FL966 Modulator Valve Corrosion May Cause Brake Pull – 2017-2023 Freightliner Cascadia, 2022-2023 Western Star 47X, Western Star 49X, & 2022 Freightliner 114SD

SEOCONTENT-START

Defect Information Report
(Section 573.6)
FL966
Date of Submission: February 16, 2023 Manufacturer: Daimler Truck North America LLC
P.O. BOX 3849
Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2017 Model Yr. End: 2023
Make: Freightliner
Model: Cascadia
Production Dates: Begin: 06/28/2016 End: 03/29/2022 Model Yr. Start: 2022 Model Yr. End: 2023
Make: Western Star
Model: 47X
Production Dates: Begin: 01/14/2022 End: 03/28/2022 Model Yr. Start: 2022 Model Yr. End: 2023
Make: Freightliner, Western Star
Model: 49X
Production Dates: Begin: 01/19/2022 End: 03/29/2022 Model Yr. Start: 2022 Model Yr. End: 2022
Make: Freightliner
Model: 114SD
Production Dates: Begin: 11/9/2021 End: 11/10/2021
Type: Truck/Tractor Descriptive Information:
Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Number potentially involved: 69,246 Estimated percentage of involve with defect: 0.1% Defect Description
Describe the defect:
On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver-initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
If a noncompliance, provide the applicable FMVSS: N/A
Describe the safety risk:
A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. If applicable, identify the manufacture of the defective or noncompliant component: Involved Components
Component Name: Single ABS Modulator Valve
Component Description: Quick Release Pneumatic Valve
Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group
12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton
Director, Regulatory Legal Counsel Mobile: 612/227-9864 scott.paxton@zf.com Component Manufacturer: ZF Group Chronology of Noncompliance Determination
Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision.
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC- equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake
pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population. Identify the Remedy
Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement.
Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule
Describe the recall schedule for notifications:
Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 04/10/2023 Planned Dealer Notification End Date: 04/10/2023 Planned Owner Notification Begin Date: 04/10/2023 Planned Owner Notification End Date: 04/10/2023 Manufacture’s identification code for this recall (if applicable): FL966 DTNA Representative;
Tiffani Torgeson
Manager, Compliance and Regulatory Affairs

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Defect Information Report
(Section 573.6)
FL966
Date of Submission: February 15,2023 Manufacturer: Daimler Truck North America LLC
P.O. BOX 3849
Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2017 Model Yr. End: 2023
Make: Freightliner, Western Star
Model: Cascadia, 49X, 47X, 114SD
Production Dates: Begin: 06/28/2016 End: 03/29/2022
Type: Truck/Tractor Descriptive Information:
Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Number potentially involved: 70,375 Estimated percentage of involve with defect:
0.1% Defect Description Describe the defect:
On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver-initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk:
A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. If applicable, identify the manufacture of the defective or noncompliant component: Brake Modulator System Involved Components
Component Name: Single ABS Modulator Valve
Component Description: Quick Release Pneumatic Valve
Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group
12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton
Director, Regulatory Legal Counsel Mobile: 612/227-9864 scott.paxton@zf.com Component Manufacturer: ZF Group Chronology of Noncompliance Determination
Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision.
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC- equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake
pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
Identify the Remedy
Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement.
Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule
Describe the recall schedule for notifications:
Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 04/10/2023 Planned Dealer Notification End Date: 04/10/2023 Planned Owner Notification Begin Date: 04/10/2023 Planned Owner Notification End Date: 04/10/2023 Manufacture’s identification code for this recall (if applicable): FL966 DTNA Representative;
Tiffani Torgeson
Manager, Compliance and Regulatory Affairs

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Defect Information Report
(Section 573.6)
FL966
Date of Submission: March 21, 2023 Manufacturer: Daimler Truck North America LLC
P.O. BOX 3849
Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2017 Model Yr. End: 2023
Make: Freightliner
Model: Cascadia
Production Dates: Begin: 06/28/2016 End: 03/28/2022 Model Yr. Start: 2022 Model Yr. End: 2022
Make: Freightliner
Model: 114SD
Production Dates: Begin: 11/9/2021 End: 11/10/2021 Model Yr. Start: 2021 Model Yr. End: 2023
Make: Western Star
Model: 47X
Production Dates: Begin: 07/08/2020 End: 03/26/2022 Model Yr. Start: 2020 Model Yr. End: 2023
Make: Freightliner, Western Star
Model: 49X
Production Dates: Begin: 03/19/2019 End: 03/29/2022
Type: Truck/Tractor Descriptive Information:
Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull. Number potentially involved: 70,167 Estimated percentage of involve with defect: 0.1% Defect Description Describe the defect:
On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver-initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force.
If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk:
A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. If applicable, identify the manufacture of the defective or noncompliant component: Involved Components
Component Name: Single ABS Modulator Valve
Component Description: Quick Release Pneumatic Valve
Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group
12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton
Director, Regulatory Legal Counsel Mobile: 612/227-9864 scott.paxton@zf.com Component Manufacturer: ZF Group Chronology of Noncompliance Determination
Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision.
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC- equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake
pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 20, 2023, DTNA reviewed records and amended the population. On March 21, 2023 amended manufacturing dates to match model and owner letter table.
Identify the Remedy
Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement.
Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the
reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule
Describe the recall schedule for notifications:
Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 04/10/2023 Planned Dealer Notification End Date: 04/10/2023 Planned Owner Notification Begin Date: 04/10/2023 Planned Owner Notification End Date: 04/10/2023 Manufacture’s identification code for this recall (if applicable): FL966 DTNA Representative;
Tiffani Torgeson
Manager, Compliance and Regulatory Affairs

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Amended Defect Information Report
(Section 573.6)
FL966
Date of Submission: February 21, 2023 (February 10, 2023) Manufacturer: Daimler Truck North America LLC
P.O. BOX 3849
Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2017 Model Yr. End: 2023
Make: Freightliner
Model: Cascadia
Production Dates: Begin: 06/28/2016 End: 03/28/2022 Model Yr. Start: 2022 Model Yr. End: 2022
Make: Freightliner
Model: 114SD
Production Dates: Begin: 11/09/2021 End: 11/10/2021 Model Yr. Start: 2021 Model Yr. End: 2023
Make: Western Star
Model: 47X
Production Dates: Begin: 05/26/2021 End: 03/26/2022 Model Yr. Start: 2020 Model Yr. End: 2023
Make: Western Star
Model: 49X
Production Dates: Begin: 09/22/2020 End: 03/29/2022 Type: Truck/Tractor Descriptive Information:
Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Number potentially involved: 70,167 Estimated percentage of involve with defect:
0.1% Defect Description Describe the defect:
On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or other system- initiated braking, but not including driver-initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk:
A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. If applicable, identify the manufacture of the defective or noncompliant component: Brake Modulator System Involved Components
Component Name: Single ABS Modulator Valve
Component Description: Quick Release Pneumatic Valve
Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group
12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton
Director, Regulatory Legal Counsel Mobile: 612/227-9864 scott.paxton@zf.com Component Manufacturer: ZF Group Chronology of Noncompliance Determination
Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision.
In late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA promptly began an investigation, including investigating drivers and running tests.
On February 6 2023, DTNA received the first indication, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events and the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC. On February 16, 2023, DTNA reviewed records and amended the population. On February 21, 2023, DTNA reviewed records, and finalized the population based on the best-known domicile country information. Identify the Remedy
Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement.
Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the
reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule
Describe the recall schedule for notifications:
Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected. Planned Dealer Notification Begin Date: 04/10/2023 Planned Dealer Notification End Date: 04/10/2023 Planned Owner Notification Begin Date: 04/10/2023 Planned Owner Notification End Date: 04/10/2023 Manufacture’s identification code for this recall (if applicable): FL966 DTNA Representative;
Tiffani Torgeson
Manager, Compliance and Regulatory Affairs

**************************************************************************************************************

Defect Information Report
(Section 573.6)
FL966
Date of Submission: February 10,2023 Manufacturer: Daimler Truck North America LLC
P.O. BOX 3849
Portland, Oregon 97208 Type of Report: X Safety Defect Non-Compliance Vehicle Information Model Yr. Start: 2017 Model Yr. End: 2023
Make: Freightliner, Western Star
Model: Cascadia, 49X, 47X, 114SD
Production Dates: Begin: 06/28/2016 End: 03/29/2022
Type: Truck/Tractor Descriptive Information:
Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Number potentially involved: 70,375 Estimated percentage of involve with defect:
0.1% Defect Description Describe the defect:
On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or other system- initiated braking, but not including driver-initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
If a noncompliance, provide the applicable FMVSS: N/A Describe the safety risk:
A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash. Identify any warning, which can precede or occur: Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. If applicable, identify the manufacture of the defective or noncompliant component: Brake Modulator System Involved Components
Component Name: Single ABS Modulator Valve
Component Description: Quick Release Pneumatic Valve
Component Part Number: WAB472 196 037 0, WAB472 196 025 0 Supplier Identification: ZF Group
12001 Tech Center Drive Livonia, MI, 48150 USA Scott Paxton
Director, Regulatory Legal Counsel Mobile: 612/227-9864 scott.paxton@zf.com Component Manufacturer: ZF Group Chronology of Noncompliance Determination
Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision.
In late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA promptly began an investigation, including investigating drivers and running tests.
On February 6 2023, DTNA received the first indication, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment,
speed, driving conditions, and level of valve blockage. Despite the fact that DTNA has no evidence of field events and the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC. Identify the Remedy
Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement.
Affected vehicles will receive two front anodized modulator valves (one each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the
reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. Identify the Recall Schedule
Describe the recall schedule for notifications:
Customer notification will be made by first class mail using Daimler Trucks North America records to determine the customers affected.
Planned Dealer Notification Begin Date: 04/10/2023 Planned Dealer Notification End Date: 04/10/2023 Planned Owner Notification Begin Date: 04/10/2023 Planned Owner Notification End Date: 04/10/2023 Manufacture’s identification code for this recall (if applicable): FL966 DTNA Representative; Tiffani Torgeson
Manager, Compliance and Regulatory Affairs

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Daimler Truck
North America LLC
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see enclosed VIN list.
March 2023
FL966
NHTSA #23V-073
Interim Notice
Subject: Brake Modulator Valves
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through March 29, 2022. See below for additional detail on vehicle applicability:
Make
Model
Model Yr. Start
Model Yr. End
Prod. Start Date
Prod. End Date
Freightliner
114 SD
2022
2022
November 9, 2021
November 10, 2021
Freightliner
Cascadia
2017
2023
June 28, 2016
March 28, 2022
Western Star
47X
2021
2023
July 8, 2020
March 26, 2022
Western Star
49X
2020
2023
March 19, 2019
March 29, 2022
On certain vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently validating the final repair and securing parts. There is no action for you to take at this time.
A second notice will inform you when the final, free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the repair for your vehicle.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days.
If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address DTNA.Warranty.Campaigns@Daimlertruck.com. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety.
WARRANTY CAMPAIGNS DEPARTMENT
Enclosure
Daimler Truck North America LLC
Warranty Campaigns Department
P.O. Box 4090
Portland, OR 97208-4090
800.547.0712 Phone

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Daimler Truck
North America LLC
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see enclosed VIN list.
October 2023
FL966
NHTSA #23V-073
Subject: Brake Modulator Valves
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, Cascadia, and Western Star 47X, and 49X vehicles. See below for additional detail on vehicle applicability:
Make
Model
Model Yr. Start
Model Yr. End
Prod. Start Date
Prod. End Date
Freightliner
114 SD
2022
2022
November 9, 2021
November 10, 2021
Freightliner
Cascadia Diesel
2017
2023
June 28, 2016
March 28, 2022
Freightliner
Cascadia Natural Gas
2019
2023
July 19, 2018
March 14, 2022
Western Star
47X
2021
2023
July 8, 2020
March 26, 2022
Western Star
49X
2020
2023
March 19, 2019
March 29, 2022
On the affected vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
A Daimler Truck North America authorized service facility will inspect and replace brake modulator valves as required. The Recall will take approximately 2 hours and will be performed free of charge.
Please contact an authorized Daimler Truck North America dealer to arrange to have the Recall performed and to ensure that parts are available at the dealership. To locate an authorized dealer, search online at https://northamerica.daimlertruck.com/contact-us. Scroll down to “Locate a Dealer” and select the appropriate brand.
You may also confirm your vehicle’s involvement in this recall at the following URL: https://dtna-dlrinfo.prd.freightliner.com:48518/VinLookup/vin-module/getVinLookupPage.
You may be liable for any progressive damage that results from your failure to complete the Recall within a reasonable time after receiving notification.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have paid to have this recall condition corrected prior to this notice, you may be eligible to receive reimbursement. Please see the reverse side of this notice for details.
If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address DTNA.Warranty.Campaigns@Daimlertruck.com. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety
WARRANTY CAMPAIGNS DEPARTMENT
Enclosure
Daimler Truck North America LLC
Warranty Campaigns Department
P.O. Box 4090
Portland, OR 97208-4090
800.547.0712 Phone
Daimler Truck
North America LLC
Reimbursement to Customers for Repairs Performed Prior to Recall
If you have already paid to have this recall condition corrected you may be eligible to receive reimbursement.
Requests for reimbursement may include parts and labor. Reimbursement may be limited to the amount the repair would have cost if completed by an authorized Daimler Truck North America LLC dealer. The following documentation must be presented to your dealer for consideration for reimbursement.
Please provide original or clear copies of all receipts, invoices, and repair orders that show
• The name and address of the person who paid for the repair
• The Vehicle Identification Number (VIN) of the vehicle that was repaired
• What problem occurred, what repair was done, when the repair was done
• Who repaired the vehicle
• The total cost of the repair expense that is being claimed
• Proof of payment for the repair (such as the front and back of a cancelled check or a credit card receipt)
Reimbursement will be made by check from your Daimler Truck North America LLC dealer.
Please speak with your Daimler Truck North America LLC authorized dealer concerning this matter.
Daimler Truck North America LLC
Warranty Campaigns Department
P.O. Box 4090
Portland, OR 97208-4090
800.547.0712 Phone

**************************************************************************************************************

DTNA Aftermarket Parts Pricing FL958 FL966 Update effectiveOctober 11th 2023
10/13/2023 • Pricing
Daimler Trucks North America (DTNA) has released Phase I of the FL958 and FL966 SMV recalls; the supporti ng campaignkit is:
Part Number: 25-FL958-000
Descripti on: KIT,FL958,ANODIZED SMV
DTNA is noti fying the network of an adjustment made to the released kit pricing.
At issue:
The FL958 and FL966 kits were priced incorrectly and have had a part price adjustment on 10/11/2023, whichwill aff ect the system price refl ected in Paragon and the Online Warranty Link (OWL). The price refl ected in Paragon andOWL will show less than the price paid for any orders before 10/11/2023, which were approximately 40 kits.
Eff ecti ve 10/11/23 Pricing has been adjusted. Please update your business systems to refl ect this change.
Dealer Net
Wholesale
Fleet
List
US
$59.60
$94.99
$106.99
$130.99
Canada
$79.98
$127.48
$143.58
$175.79
Soluti on
: For full recovery Dealers are instructed to fi le a
recall campaign preapproval claim
and adjust the claimed priceto the amount paid; please also att ach a copy of the PDC invoice.
Please direct inquiries via APC or email AM-STRAT-PR@daimlertruck.com.
Kelley Marti n
Director, Strategic Pricing & Operati ons
803-810-7331
Kelley.Marti n@DaimlerTruck.com
Tamara Steinberger
Strategic Pricing Manager
803-280-5117
Tamara.Steinberger@DaimlerTruck.com
Matt hew Hugenschmidt
Strategic Pricing Manager
803-578-3140
Matt hew.Hugenschmidt@DaimlerTruck.com

**************************************************************************************************************

Subject: Brake Modulator Valves
Models Affected: Specific model years 2017-2022 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through April 8, 2022.
General Information
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect that relates to motor vehicle safety exists on the vehicles mentioned above.
On the affected vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC), may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
A Daimler Truck North America authorized service facility will inspect and replace the brake modulator valves as required.
There are approximately 90,000 vehicles involved in this campaign.
REVISION: The work instruction has been updated to include additional information about the special tool needed for repair.
Additional Repairs
Dealers must complete all outstanding recall and field service campaigns prior to the sale or delivery of a vehicle. A dealer will be liable for any progressive damage that results from its failure to complete campaigns before sale or delivery of a vehicle.
Owners may be liable for any progressive damage that results from failure to complete campaigns within a reasonable time after receiving notification.
Work Instructions
Please refer to the attached work instructions. Prior to performing the campaign, check the vehicle for a completion sticker (Form WAR260).
Replacement Parts
Replacement parts are now available and can be obtained by ordering the kit and/or part number(s) listed below from your facing Parts Distribution Center (PDC).
If our records show your dealership has ordered any vehicle(s) involved in campaign number FL966, a list of the customers and vehicle identification numbers will be available on the DTNA Portal. Please refer to this list when ordering parts for this recall.
Table 1 – Replacement Parts for FL966 Part Description
SOLENOID,ABS MODULATOR WASHER-FLAT,STEEL,HARDENED,3/8
SPACER-AL,.375 ID.75 O SCREW-HEX FLANGE,M8X1.25X90
NUT Number
25-FL958-001
23-09114-002
23-12240-025
23-14064-090
N913023 008003
Daimler Truck North America LLC
Recall Campaign
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Table 1 continued Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign Campaign Number
FL966C FL966D FL966E FL966F FL958A-F Kit Number Part Description
NUT-HEX,FLANGE,LOCK,5/16-18,ZINC SCREW
SCREW SCREW
NUT-HEXFLGH,PILOTED,M8X1.25 SPACER-AL,.406IDX1 ODX BLANK COMPLETION STICKER
Table 1 continued from pg. 1 Part Number
23-13861-105
N910105 008042
N910105 008042
23-12489-095
23-14525-000
23-11427-075
WAR260 Qty.
4 ea
4 ea
4 ea 4 ea 1 ea Removed Parts
U.S. and Canadian Dealers, please follow Warranty Failed Parts Tracking shipping instructions for the disposition of all removed parts. Export distributors, please destroy removed parts unless otherwise advised.
Labor Allowance
Table 2 – Labor Allowance Campaign Number
FL966A-F FL966B Procedure
Inspect and replace brake modulator valves Inspect brake modulator valves Time Allowed (hours)
1.0
0.1 SRT Code
996-R215B
996-R215A Corrective Action
12-Repair Recall/Campaign 06-Inspect Table 2
IMPORTANT: When the recall has been completed, locate the base completion label in the appropriate location on the vehicle, and attach the red completion sticker provided in the recall kit (Form WAR260). If the vehicle does not have a base completion label, clean a spot on the appropriate location of the vehicle and first attach the base completion label (Form WAR259). If a recall kit is not required or there is no completion sticker in the kit, write the recall number on a blank sticker and attach it to the base completion label.
Claims for Credit
You will be reimbursed for your parts, labor, and handling (landed cost for Export Distributors) by submitting your claim through the warranty system within 30 days of completing this campaign. Please reference the following information in OWL:
• Claim type is Recall Campaign.
• In the Campaign field, enter the campaign number and appropriate condition code (e.g. FL966-A, FL966-B, etc.).
• In the Primary Failed Part Number field, enter 25-FL966-000.
• In the Parts field, enter the appropriate kit or part number(s) as shown in the Replacement Parts table.
• In the Labor field, first enter the appropriate SRT from the Labor Allowance table. Administrative time will be included automatically as SRT 939-6010A for 0.3 hours;.
• The VMRS Component Code is F99-999-005 and the Cause Code is A1 – Campaign.
• U.S. and Canada — Reimbursement for Prior Repairs. When a customer asks about reimbursement, please do the following:
• Accept the documentation of the previous repair.
• Make a brief check of the customer’s paperwork to see if the repair may be eligible for reimburse- ment. (See the “Copy of Owner Letter” section of this bulletin for reimbursement guidelines.) Page 2 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign • Submit an OWL Recall Pre-Approval request for a decision.
• Include the approved amount on your claim in the Other Charges section.
• Attach the documentation to the pre-approval request.
• If approved, submit a based-on claim for the pre-approval.
• Reimburse the customer the appropriate amount.
IMPORTANT: OWL must be viewed prior to performing the recall to ensure the vehicle is involved and the campaign has not been previously completed. Also, check for a completion sticker prior to beginning work.
U.S. and Canadian dealers, if you need additional information, contact the Warranty Campaigns Department using the WSC (Warranty Support Center) app on the DTNA Portal. Export distributors, submit a WSC ticket or contact your International Service Manager.
U.S. and Canadian Dealers: To return excess kit inventory related to this campaign, U.S. dealers must submit a Parts Authorization Return (PAR) to the Memphis PDC. Canadian dealers must submit a PAR to their facing PDC. All kits must be in resalable condition. PAR requests must include the original purchase invoice number. Export Distributors: Excess inventory is not returnable.
The letter notifying U.S. and Canadian vehicle owners is included for your reference.
Please note that the National Traffic and Motor Vehicle Safety Act, as amended (Title 49, United States Code, Chapter 301), requires the owner’s vehicle(s) be corrected within a reasonable time after parts are available to you. The Act states that failure to repair a vehicle within 60 days after tender for repair shall be prima facie evidence of an unreasonable time. However, circumstances of a particular situation may reduce the 60 day period. Failure to repair a vehicle within a reasonable time can result in either the obligation to (a) replace the vehicle with an identical or reasonably equivalent vehicle, without charge, or (b) refund the purchase price in full, less a reasonable allowance for depreciation. The Act further prohibits dealers from selling a vehicle unless all outstanding recalls are performed. Any lessor is required to send a copy of the recall notification to the lessee within 10 days. Any subsequent stage manufacturer is required to forward this notice to its distributors and retail outlets within five working days. Page 3 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign Copy of Notice to Owners
Subject: Brake Modulator Valves This notice is sent to you in accordance with the requirements of the Motor Vehicle Safety Act. This is to inform you that your vehicle may contain a defect that could affect the safety of a person.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured September 15, 2016, through April 8, 2022.
On the affected vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC), may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
A Daimler Truck North America authorized service facility will inspect and replace brake modulator valves as required. The Recall will take approximately 2 hours and will be performed free of charge.
Please contact an authorized Daimler Truck North America dealer to arrange to have the Recall performed and to ensure that parts are available at the dealership. To locate an authorized dealer, search online at https://northamerica.daimlertruck.com/contact-us. Scroll down to “Locate a Dealer” and select the appropriate brand. You may also confirm your vehicle’s involvement in this recall at the following URL:
https://dtna-dlrinfo.prd.freightliner.com:48518/VinLookup/vin-module/getVinLookupPage.
You may be liable for any progressive damage that results from your failure to complete the recall within a reasonable time after receiving notification.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the recall notification, please return the notification to the Warranty Campaigns Department in the postage-paid envelope with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have paid to have this recall condition corrected prior to this notice, you may be eligible to receive reimbursement. Please see the reverse side of this notice for details.
If you have questions about this recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address dtna.warranty.campaigns@daimlertruck.com. If you wish to submit a complaint about this recall, you can contact Transport Canada – Road Safety, 80 Rue Noel, Gatineau, Quebec J8Z 0A1, or call (800) 333-0510.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety. WARRANTY CAMPAIGNS DEPARTMENT
Enclosure Page 4 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign Copy of Notice to Owners
Subject: Brake Modulator Valves This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through March 29, 2022.
On the affected vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC), may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
A Daimler Truck North America authorized service facility will inspect and replace brake modulator valves as required. The Recall will take approximately 2 hours and will be performed free of charge.
Please contact an authorized Daimler Truck North America dealer to arrange to have the Recall performed and to ensure that parts are available at the dealership. To locate an authorized dealer, search online at https://northamerica.daimlertruck.com/contact-us. Scroll down to “Locate a Dealer” and select the appropriate brand. You may also confirm your vehicle’s involvement in this recall at the following URL:
https://dtna-dlrinfo.prd.freightliner.com:48518/VinLookup/vin-module/getVinLookupPage.
You may be liable for any progressive damage that results from your failure to complete the recall within a reasonable time after receiving notification.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the recall notification, please return the notification to the Warranty Campaigns Department in the postage-paid envelope with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, federal law requires that you forward this notice to your distributors and retail outlets within five working days. If you have paid to have this recall condition corrected prior to this notice, you may be eligible to receive reimbursement. Please see the reverse side of this notice for details.
If you have questions about this recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address dtna.warranty.campaigns@daimlertruck.com. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue, SE., Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety. WARRANTY CAMPAIGNS DEPARTMENT
Enclosure Page 5 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign Reimbursement to Customers for Repairs Performed Prior to Recall
If you have already paid to have this recall condition corrected you may be eligible to receive reimbursement.
Requests for reimbursement may include parts and labor. Reimbursement may be limited to the amount the repair would have cost if completed by an authorized Daimler Truck North America LLC dealer. The following documentation must be presented to your dealer for consideration for reimbursement.
Please provide original or clear copies of all receipts, invoices, and repair orders that show:
• The name and address of the person who paid for the repair
• The Vehicle Identification Number (VIN) of the vehicle that was repaired
• What problem occurred, what repair was done, when the repair was done
• Who repaired the vehicle
• The total cost of the repair expense that is being claimed
• Proof of payment for the repair (such as the front and back of a cancelled check or a credit card receipt) Reimbursement will be made by check from your Daimler Truck North America LLC dealer.
Please speak with your Daimler Truck North America LLC authorized dealer concerning this matter. Page 6 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign Work Instructions Subject: Inspect and Replace Brake Modulator Valves
Models Affected:Specific model years 2017-2022 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through April 8, 2022.
REVISION: The work instruction has been updated to include additional information about the special tool needed for repair.
IMPORTANT: Due to parts unavailability, this campaign will be released in phases. The phase will be deter- mined based on corrosion factors. You must confirm a vehicle displays FL966 on the OWL coverage information screen before proceeding.
PLEASE DO NOT OVERSTOCK THE KITS, AND DO NOT PERFORM ON THE VEHICLES THAT ARE NOT ACTIVE IN OWL.
FL966B – Front Modulator Valve Inspection
1. Check the base label (Form WAR259) for a completion sticker for FL966 (Form WAR260), indicating this work has been done. The base label is usually located on the passenger-side door, about 12 inches
(30 cm)below the door latch. If a completion sticker is present, no work is needed. If a completion sticker is not present, proceed to the next step.
2. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires.
3. Open the hood.
NOTE: Both the left- and right-hand modulator valves must be inspected. If either one of the modulator valves is bad, replace both modulator valves.
4. Remove the connector from the valve, and inspect the part number underneath the connector. See Fig. 1. Good part numbers → 472 196 046 0 and 472 196 051 0
Bad part numbers → 472 196 025 0 and 472 196 037 0
• If the part numbers are good, install the connector. Clean a spot on the base label (Form WAR259), and attach a campaign completion sticker for FL966 (Form WAR260), indicating this work has been completed.
• If at least one of the part numbers is bad, go to the replacement procedure for the specified group, and replace both the modulator valves. Page 7 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign 1 09/26/2023
1. Part Number Fig. 1, Modulator Valve f422932 FL966A, B – Front Modulator Valve Replacement
NOTE: Both the left- and right-hand modulator valves must be replaced.
1. Locate the modulator valve on the front-left frame rail, behind the wheel. See Fig. 2.
2. Use the flat end of a screwdriver to disconnect the modulator valve electrical connector located on the front side of the frame rail, above the front axle. See Fig. 3. 1 08/03/2020 f422737 07/08/2020 f422722 1. Modulator Valve
Fig. 2, Location of the Modulator Valve Fig. 3, Location of the Electrical Connector Page 8 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign 3. Remove the antilock braking system (ABS) zip tie from the modulator mounting bolt. See Fig. 4 1 07/06/2020
1. Zip Tie Fig. 4, ABS Zip Tie f422723 4. Use special tool (NQ307001-1) supplied in special tool kit NQ307001, referenced in Tool Letter 18 TL-15, to disconnect the plastic air line from the modulator valve. See Fig. 5 and Fig. 6. 08/03/2020 f422738 08/03/2020 f422739 Fig. 5, Special Tool (NQ307001-1) Fig. 6, Disconnecting the Plastic Air Line Page 9 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign 5. Use a 7/8-inch wrench to remove the quick-connect fitting from the modulator. See Fig. 7.
6. Use a 7/8-inch wrench to remove the threaded air line that connects the modulator to the brake chamber. See Fig. 8. A 07/08/2020 f422725 07/08/2020 f422726 Fig. 7, Disconnecting the Quick-Connect Fitting A. Remove the threaded air line that connects the modulator valve to the brake chamber.
Fig. 8, Removing the Threaded Air Line 7. Use a 23-mm wrench to loosen the brake chamber air line fitting on the modulator valve. See Fig. 9. 1 07/06/2020
1. Air Line Fitting f422727 Fig. 9, Loosening the Brake Chamber Air Line Fitting
8. Use a 1/2-inch socket wrench to remove the two modulator valve mounting bolts, then remove the modula- tor valves from the vehicle.
9. Use a 23-mm wrench to remove the brake chamber air line fitting from the modulator valve. Page 10 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign IMPORTANT: The quick connect fittings come with pre-applied dry sealant (Vibra-Seal) which can be reused up to five times. Replace the fitting with a new one if the thread sealant is no longer usable.
10. Use a 23-mm wrench to install the brake chamber air line fitting on the new modulator valve.
11. Use a 1/2-inch socket wrench along with the new bolts, spacers, and washers (supplied in the kit) to install the modulator on the vehicle. Tighten the bolts 11 lbf·ft (15 N·m). See Fig. 10, Fig. 11, Fig. 12, and Fig. 13. 4 3 3 1 2 2 1 08/28/2020
1. Nuts
2. Spacers
3. Washers
4. Bolts
Fig. 10, 25-FL958-000 Kit Components f422741 3 08/31/2020
1. Modulator Valve
2. Spacers
3. Hose f422744 Fig. 11, Installing the Spacers Page 11 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign 1 1 09/01/2020
1. Nuts and Washers f422746 09/01/2020
1. Mounting Bolts and Washers f422745 Fig. 13, Modulator Valve Fasteners, Outside Frame Rail View Fig. 12, Modulator Valve Fasteners, Inside Frame Rail View
12. Use a 7/8-inch wrench to install the threaded air line that connects the modulator valve to the brake chamber.
IMPORTANT: The quick connect fittings come with pre-applied dry sealant (Vibra-Seal) which can be reused up to five times. Replace the fitting with a new one if the thread sealant is no longer usable.
13. Use a 7/8-inch wrench to install the quick-connect fitting on the modulator valve.
14. Attach the plastic air line to the modulator.
15. Install the ABS zip tie on the modulator mounting bolt (to prevent chafing).
16. Connect the modulator valve electrical connector.
17. Repeat the procedure for the modulator valve on the other side of the vehicle.
18. Close the hood.
19. Build air pressure to check for leaks and perform six full brake applications in the parking lot to verify proper brake performance.
20. Clean a spot on the base label (Form WAR259), and attach a campaign completion sticker for FL966 (Form WAR260), indicating this work has been completed. Page 12 Daimler Truck North America LLC
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN Recall Campaign FL966C – Front Modulator Valve Replacement
For vehicles belonging to group C, the replacement procedure is the same as groups A and B, but the location of the valves is different. Location of the modulator valve is shown in Fig. 14 and Fig. 15. 09/14/2023 f422927 Fig. 15, Modulator Valve Mounting Location 09/14/2023 f422926 Fig. 14, Modulator Valve Mounting under the Cross Member
FL966F – Front Modulator Valve Replacement
For vehicles belonging to group F, the replacement procedure is the same as groups A and B, but the location of the valves is different. Location of the modulator valve is shown in Fig. 16. 09/14/2023 f422931 Fig. 16, Modulator Valve Mounting Inside the Frame Rails Page 13 FL966E – Front Modulator Valve Replacement
For vehicles belonging to group E, the replacement procedure is the same as groups A and B, but the location of the valves is different. Location of the modulator valve is shown in Fig. 19.
09/14/2023
f422929 Fig. 17, Modulator Valve Mounting Inside the Frame Rails
09/14/2023
f422930
Fig. 18, Modulator Valve Mounting location
09/14/2023 f422928 Fig. 19, Modulator Valve Mounting Inside the Frame Rails
Daimler Truck North America LLC
Recall Campaign
October 2023 FL966A-F NHTSA #23V-073
Transport Canada #2023-051 REVISED BULLETIN
Page 14
FL966D – Front Modulator Valve Replacement
For vehicles belonging to group D, the replacement procedure is the same as groups A and B, but the location
of the valves is different. Location of the modulator valve is shown in Fig. 17 and Fig. 18.

**************************************************************************************************************

The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 1 of 1
Daimler Truck North America LLC
REF #:
ICI23-012
Effective:
04/10/2023
Release:
04/10/2023
SUBJECT:
FL966 – Interim Recall Notice
This letter is to inform you that an interim recall notice is being sent to affected customers for recall FL966~The Brake Modulator Valves. The interim notices will be mailed on 04/10/2023. A copy follows for your reference. This notice is for your information only. There is no action for customers or dealers to take. If customers inquire, please refer them to the interim notice. If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry through the WSC Link on DTNAPortal.
REF #: ICI23-012 En vigueur: 10/04/2023
Date de sortie:
10/04/2023
OBJET:
FL966 – Avis de Rappel Provisoire
Cette lettre a pour but de vous informer qu’un avis de rappel provisoire est envoyé aux clients concernés pour le rappel FL966~The Brake Modulator Valves. Les avis intermédiaires seront postés le 10/04/2023. Une copie suit pour votre référence.
Cet avis est pour votre information seulement. Les clients ou les revendeurs n’ont aucune action à entreprendre. Si les clients demandent, veuillez les renvoyer à l’avis provisoire.
Si vous avez des questions ou avez besoin de plus amples informations, contactez le service des campagnes de garantie en soumettant une demande via le lien WSC sur DTNAPortal.
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Direct Warranty Customers – U.S. and Canada
If you have questions about this Letter, please submit your inquiry on the Web using the WSC Link on DTNAConnect
Daimler Truck
North America LLC
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see enclosed VIN list.
March 2023
FL966
NHTSA #23V-073
Interim Notice
Subject: Brake Modulator Valves
This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through March 29, 2022. See below for additional detail on vehicle applicability:
Make
Model
Model Yr. Start
Model Yr. End
Prod. Start Date
Prod. End Date
Freightliner
114 SD
2022
2022
November 9, 2021
November 10, 2021
Freightliner
Cascadia
2017
2023
June 28, 2016
March 28, 2022
Western Star
47X
2021
2023
July 8, 2020
March 26, 2022
Western Star
49X
2020
2023
March 19, 2019
March 29, 2022
On certain vehicles, the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently validating the final repair and securing parts. There is no action for you to take at this time.
A second notice will inform you when the final, free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the repair for your vehicle.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days.
If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712, 7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address DTNA.Warranty.Campaigns@Daimlertruck.com. For other concerns, you may contact the Customer Assistance Center at (800) 385-4357. If you are not able to have the defect remedied without charge and within a reasonable time, you may wish to submit a complaint to the Administrator, National Highway Traffic Safety Administration, 1200 New Jersey Avenue SE, Washington, DC 20590; or call the Vehicle Safety Hotline at (888) 327-4236 (TTY: 800-424-9153); or go to http://www.nhtsa.gov.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety.
WARRANTY CAMPAIGNS DEPARTMENT
Enclosure
Daimler Truck North America LLC
Warranty Campaigns Department
P.O. Box 4090
Portland, OR 97208-4090
800.547.0712 Phone
Daimler Truck
North America LLC
IMPORTANT SAFETY RECALL
This notice applies to your vehicle(s), see enclosed VIN list.
March 2023
FL966
Transport Canada #2023-051
Interim Notice
Subject: Brake Modulator Valves
This notice is sent to you in accordance with the requirements of the Motor Vehicle Safety Act. This is to inform
you that your vehicle may contain a defect that could affect the safety of a person.
Daimler Truck North America LLC (DTNA), on behalf of its Freightliner Trucks Division, and wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect, which relates to motor vehicle safety, exists in certain 2017-2023 Freightliner 114SD, and Cascadia; and Western Star 47X, and 49X vehicles manufactured June 28, 2016, through March 29, 2022. See below for additional detail on vehicle applicability:
Make
Model
Model Yr. Start
Model Yr. End
Prod. Start Date
Prod. End Date
Freightliner
Cascadia
2017
2023
September 15, 2016
March 31, 2022
Western Star
47X
2021
2023
September 14, 2021
April 8, 2022
Western Star
49X
2023
2023
June 29, 2020
March 26, 2022
On the affected vehicles the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
This is the first of two notices you will receive regarding this subject. This letter is to inform you of an upcoming Recall to correct the issue noted above. Daimler Truck is currently validating the final repair and securing replacement parts. There is no action for you to take at this time.
A second notice will inform you when the final, free remedy is available. When you receive the second notice, please contact your authorized Daimler Truck North America dealer to schedule the repair for your vehicle.
If you do not own the vehicle that corresponds to the identification number(s) which appears on the Recall Notification, please return the notification to the Warranty Campaigns Department with any information you can furnish that will assist us in locating the present owner. If you have leased this vehicle, Federal law requires that you forward this notice to the lessee within 10 days. If you are a subsequent stage manufacturer, Federal law requires that you forward this notice to your distributors and retail outlets within five working days.
If you have questions about this Recall, please contact the Warranty Campaigns Department at (800) 547-0712,
7:00 a.m. to 4:00 p.m. Pacific Time, Monday through Friday, e-mail address
DTNA.Warranty.Campaigns@Daimlertruck.com. For other concerns, you may contact the Customer Assistance
Center at (800) 385-4357. If you have a safety concern relating to this Recall, you may wish to contact
Transport Canada – Motor Vehicle Safety at, 80 rue Noel, Gatineau, Quebec J8Z 0A1 or phone (800) 333-0510.
We regret any inconvenience this action may cause but feel certain you understand our interest in motor vehicle safety.
WARRANTY CAMPAIGNS DEPARTMENT
Enclosure
Daimler Truck North America LLC
Warranty Campaigns Department
P.O. Box 4090
Portland, OR 97208-4090
800.547.0712 Phone
Daimler Truck
North America LLC
Rappel de sécurité important
Le présent avis s’applique à votre (vos) véhicule (s), voir la liste des NIV ci-jointe.
Mars 2023
FL966
Transports Canada #2023-051
Avis provisoire
Objet: Valves de modulateur de frein
Le présent avis vous est envoyé conformément aux exigences de la Loi sur la sécurité automobile. La présente a pour but de vous informer que votre véhicule est susceptible d’avoir un défaut qui pourrait porter atteinte à la sécurité humaine.
Daimler Truck North America LLC (DTNA), au nom de sa Freightliner Trucks Division et filiale en propriété exclusive, Western Star Truck Sales, Inc., a décidé qu’il existe un défaut relatif à la sécurité des véhicules automobiles dans certains véhicules 2017-2023 Freightliner 114SD et Cascadia; et Western Star 47X et 49X fabriqués du 28 juin 2016 au 29 mars 2022. Voir ci-dessous pour plus de détails sur l’applicabilité des véhicules:
Faire
Modèle
Début de l’année de modèle
Fin de l’année modèle
Date de début de la production
Date de fin de production
Freightliner
Cascadia
2017
2023
Le 15 septembre 2016
Le 31 mars 2022
Étoile de l’Ouest
47X
2021
2023
14 septembre 2021
Le 8 avril 2022
Étoile de l’Ouest
49X
2023
2023
29 juin 2020
Le 26 mars 2022
Sur les véhicules touchés, les soupapes du modulateur de frein de l’essieu avant peuvent se corroder, ce qui, lors d’un freinage déclenché par le contrôle électronique de la stabilité (ESC) ou le contrôle de la stabilité en roulis (RSC), peut entraîner une pression complète du système appliquée à l’extrémité de la roue avant, ce qui entraîne un différentiel de traction des freins dans la force de freinage. Une pression complète du système appliquée à une extrémité de roue avant pourrait entraîner une traction des freins, ce qui entraînerait un changement soudain de direction du véhicule en raison d’un freinage inégal sur l’essieu avant, ce qui accroît le risque d’accident.
Il s’agit du premier de deux avis que vous recevrez à ce sujet. La présente vise à vous informer d’un rappel à venir pour corriger le problème susmentionné. Daimler Truck est en train de valider la réparation finale et de sécuriser les pièces de rechange. Il n’y a aucune mesure à prendre pour le moment.
Un deuxième avis vous informera de la disponibilité du recours définitif et gratuit. Lorsque vous recevez le deuxième avis, veuillez communiquer avec votre concessionnaire autorisé Daimler Truck North America pour planifier la réparation de votre véhicule.
Si vous n’êtes pas propriétaire du véhicule correspondant au (x) numéro (s) d’identification figurant sur l’avis de rappel, veuillez retourner l’avis à la garantie Campagnes Department avec tous les renseignements que vous pouvez fournir qui nous aideront à localiser le propriétaire actuel. Si vous avez loué ce véhicule, la loi fédérale exige que vous transmettiez cet avis au locataire dans les 10 jours. Si vous êtes un fabricant subséquent, la loi fédérale exige que vous transmettiez cet avis à vos distributeurs et points de vente au détail dans un délai de cinq jours ouvrables.
Si vous avez des questions au sujet de ce rappel, veuillez communiquer avec le Service des campagnes de garantie au (800) 547-0712, de 7 h à 16 h, heure du Pacifique, du lundi au vendredi, à l’adresse courriel suivante : DTNA.Warranty.Campaigns@Daimlertruck.com. Pour toute autre question, vous pouvez communiquer avec le Centre d’assistance à la clientèle au (800) 385-4357. Si vous avez des préoccupations en matière de sécurité relativement à ce rappel, vous pouvez communiquer avec Transports Canada — Sécurité des véhicules automobiles au 80, rue Noel, Gatineau (Québec) J8Z 0A1 ou téléphoner au (800) 333-0510.
Nous regrettons tout inconvénient que cette mesure pourrait causer, mais nous sommes certains que vous comprenez notre intérêt pour la sécurité des véhicules automobiles.
SERVICE DES CAMPAGNES DE GARANTIE
Enceinte
Daimler Truck North America LLC
Service des campagnes de garantie
C.P. 4090
Portland, OR 97208-4090
800.547.0712 Phun

**************************************************************************************************************

The information contained in this letter supersedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 1 of 2
Daimler Truck North America LLC
REF #:
ICI21-016R
Effective:
07/02/21
Release:
07/05/21 (Revised: 12/07/2023)
SUBJECT:
Revised: CPWA Recall Program
Revisions are in blue font.
On a limited basis, DTNA allows the Customer Performed Warranty Agreement (CPWA) Program to support select Recall Campaigns.
Recall Campaigns address urgent safety and emission compliance issues. DTNA complies with U.S. and Canadian federal regulations and adheres to all requirements for recall campaign documentation, repair completion, reporting to federal agencies, etc. In adding recall repairs to the CPWA Program, regulatory compliance by sponsoring locations and customers is also required.
With approval from sponsoring locations, select customers are allowed to perform certain safety and emission Recall Campaign repairs. Customers may only do this work if their CPWA has been adjusted and is on file with DTNA. Sponsoring locations are responsible for the management of this program (i.e., determining whether customer facilities are suitable and identifying the specific, DTNA-approved recalls that a customer can complete).
The following recalls are approved for CPWA activity, pending sponsoring-dealer approval:
RECALL NUMBER
RECALL NAME
START DATE
VEHICLE POPULATION
D18R3
SOFTWARE REPROGRAMMING FOR CALIFORNIA INSPECTION AND MAINTENANCE
5/8/2018
3,625
D19R3
GHG17 DD PLATFORM MODEL YEARS 2019 SOFTWARE REPROGRAMMING
9/18/2019
418
D19R6
GHG17 DD13 MODEL YEAR 2019 SOFTWARE REPROGRAMMING
11/20/2019
334
D20R1
EMISSION RECALL GHG21 DETROIT DD13 MODEL YEAR 2020 SOFTWARE REPROGRAMMING
8/14/2020
1,188
D21M4
LOW PRESSURE FUEL LINE REPLACEMENT
8/2/2021
22,258
D21M7
DD16 DEACTIVATE ACCELERATION RATE MANAGEMENT
11/11/2021
1,177
D21M8
GEN5 DD15 FUEL LINE SUPPORT BRACKET BOLT REPLACEMENT
12/3/2021
8
D21R1
EMISSION RECALL GHG14 DETROIT DD13 WITH TWO-BOX AFTERTREATMENT SOFTWARE REPROGRAMMING
4/5/2021
10
D21R4
D21R4 – HDEP NOX SENSOR/COOLING SYSTEM MONITOR UPDATE
1/24/2022
8,602
D21R5
EMISSION RECALL GHG17 DETROIT DD5 NOX SENSOR AND COOLING SYSTEM MONITOR SOFTWARE REPROGRAMMING
4/8/2021
160
D22M1
GEN5 DD15 ADJUSTMENT SCREW FAILURES ICA IDLE SPEED INCREASE
1/21/2022
16,411
D22M2
HDEP GHG14 DD15 CARB SETTLEMENT MY13 – 15 472906
2/1/2022
14,199
D22R1
HDEP GHG14, MY13 DD13 1-BOX REPROGRAMMING
2/18/2022
4,286
D22R2
DD8 MY2022 CONDITIONAL CERTIFICATION RESOLUTION
9/1/2022
2,541
D22R3
GEN5 ACM3 MISSING 6N4C GROUP ACM REPROGRAMMING
8/29/2022
1,683
D22R4
DD15 GEN5 MCM DOWN-FLASHED ZGS PROGRAMMING
8/29/2022
274
D22R7
MCI DD13 SCR CLOSED LOOP FAULTS: MCM FUEL MAP UPDATE
7/25/2022
478
FL756
BRAKE LIGHT PRESSURE SWITCH
4/17/2018
503,903
FL814
FCCC MT CHASSIS BRAKE PEDAL CLEVIS PIN
8/23/2019
10,417
FL834
WESTERN STAR BAGGAGE & SLEEPER DOORS
8/14/2020
5,255
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Thomas Built Buses Dealers – U.S. and Canada
If you have questions about this Letter, please submit your inquiry on the Web using the WSC Link on the DTNA Portal
The information contained in this letter supersedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 2 of 2
FL836
WESTERN STAR VENT WINDOWS
8/14/2020
4,924
FL848
MUD FLAP REFLECTIVE TAPE
5/22/2020
64,047
FL855
BRAKING SYSTEM PLATFORM SINGLE MODULATOR VALVES
9/2/2020
148,912
FL857
KONGSBERG ADJUSTABLE BRAKE PEDAL
7/28/2020
1,720
FL859
OPTIVIEW DASH CLUSTER BRIGHTNESS
8/14/2020
1,719
FL863
FREIGHTLINER CASCADIA BRAKE LIGHT ILLUMINATION (DETROIT ENGINE)
6/9/2022
145,443
FL865
EATON CLUTCH REPLACEMENT
5/27/2020
6,516
FL872
CASCADIA BRIDGESTONE STEER TIRE FAILURES
3/17/2021
4,387
FL874
M2 TRANSMISSION OIL COOLER LINE
4/9/2021
16,673
FL893
ALUMINUM BATTERY CABLE FAILURE
2/22/2022
141,201
FL898
TBB HDX ALTERNATOR CHARGE CABLE ROUTING
10/15/2021
2,047
FL900
CASCADIA DRAG LINK TAPERED JOINT
10/29/2021
115,008
FL904
TBB ALTERNATOR CABLE LOOSE
12/17/2021
1,451
FL907
WESTERN STAR POWER CABLE STUDS
1/8/2022
9,317
FL908
WIDE BASE TIRE AND WHEEL COMBINATIONS
4/28/2022
1,256
FL912
FCCC MOTORHOME VALVE STEM STABILIZERS
1/13/2022
18736
FL917
FCCC CHASSIS REAR PDM
3/24/2022
25185
FL922
FREIGHTLINER CASCADIA AND WESTERN STAR 49X EXHAUST SUPPORT BRACKET (EMISSIONS)
5/17/2022
52,565
FL958
BRAKE MODULATOR VALVES
10/5/2023
64,942
FL966
BRAKE MODULATOR VALVES
10/5/2023
90,675
FL969
WINDSHIELD WIPER ARMS
05/30/2023
68,789
If you have questions or need further information:
• Contact the Warranty Campaigns Department by submitting an inquiry through the WSC Link on DTNA Portal
• Review the Special Warranty Programs > CPWA Program section of the DTNA Warranty Manual
• Review current customer agreements on file

**************************************************************************************************************

The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 1 of 2
Daimler Truck North America LLC
REF #:
ICI23-018
Effective:
06/01/2023
Release:
05/23/2023
(Revision: 01/23/2024)
SUBJECT:
(Revised) Love’s Travel Stops Authorized Campaign Program
This letter is to inform you that, per the 05/24/2023 joint memo from DTNA and the Dealer Council, DTNA will allow Love’s service centers to perform select Recall and Field Service Campaigns
Recall campaigns address urgent safety and emission compliance issues. DTNA complies with U.S. and Canadian federal regulations and adheres to all requirements for Recall campaign documentation, repair completion, reporting to federal agencies, etc. By adding recall repairs to the Love’s service agreement, regulatory compliance by sponsoring locations and customers is also required.
With initial approval from sponsoring locations, Love’s service centers are authorized to perform specific Freightliner campaign repairs.
Love’s sponsoring locations are responsible for the management of this program (i.e., determining whether customer facilities are suitable and identifying the specific, DTNA-approved campaigns that a Love’s service centers can perform).
The following Recall Campaigns are approved for Love Service Centers:
.
Campaign Number
Campaign Name
Start Date
Open Vehicle Population
FL756
Brake Light Pressure Switch
4/7/2018
101,677
FL791
Freightliner Steering Shafts
11/14/2018
4,832
FL848
Mud Flap Reflective Tape
5/22/2020
23,686
FL863
Brake Light Illumination DETROIT ENGINE (Group A only)
8/14/2020
23,769
FL872
Cascadia Bridgestone Steer Tires
3/17/2021
572
FL874
M2 Transmission Oil Cooler Line
4/9/2021
8,057
FL900
Cascadia Drag Link Tapered Joint
11/11/2021
16,891
FL958
Brake Modulator Valves
10/05/2023
39,490
FL966
Brake Modulator Valves
10/05/2023
29,974
FL967
Drag Link Tapered Joint
4/21/2023
41,185
FL969
Windshield Wiper Arms
5/30/2023
41,474
If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry using the Warranty Support Center (WSC) app, located on the DTNA Portal.
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Thomas Built Buses Dealers – U.S. and Canada
Direct Warranty Customers – U.S. and Canada
Detroit Diesel Distributors
Export Distributors
Love’s Travel Stops
If you have questions about this letter, please submit your inquiry using the WSC app on the DTNA Portal.
The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 2 of 2

**************************************************************************************************************

The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 1 of 2
Daimler Truck North America LLC
REF #:
ICI23-018R5
Effective:
06/01/2023
Release:
05/23/2023
(Revision: 12/15/2023)
SUBJECT:
(Revised) Love’s Travel Stops Authorized Campaign Program
This letter is to inform you that, per the 05/24/2023 joint memo from DTNA and the Dealer Council, DTNA will allow Love’s service centers to perform select Recall and Field Service Campaigns
Recall campaigns address urgent safety and emission compliance issues. DTNA complies with U.S. and Canadian federal regulations and adheres to all requirements for Recall campaign documentation, repair completion, reporting to federal agencies, etc. By adding recall repairs to the Love’s service agreement, regulatory compliance by sponsoring locations and customers is also required.
With initial approval from sponsoring locations, Love’s service centers are authorized to perform specific Freightliner campaign repairs.
Love’s sponsoring locations are responsible for the management of this program (i.e., determining whether customer facilities are suitable and identifying the specific, DTNA-approved campaigns that a Love’s service centers can perform).
The following Recall Campaigns are approved for Love Service Centers:
.
Campaign Number
Campaign Name
Start Date
Open Vehicle Population
FL756
Brake Light Pressure Switch
4/7/2018
104,095
FL791
Freightliner Steering Shafts
11/14/2018
5,149
FL848
Mud Flap Reflective Tape
5/22/2020
30,371
FL855
Braking system Platform Single Mod Valves
9/2/2020
22,730
FL863
Freightliner Brake Light Illumination
8/14/2020
4,924
FL872
Cascadia Bridgestone Steer Tires
3/17/2021
4,387
FL874
M2 Transmission Oil Cooler Line
4/9/2021
8,517
FL900
Cascadia Drag Link Tapered Joint
11/11/2021
20,568
FL958
Brake Modulator Valves
10/05/2023
64,948
FL966
Brake Modulator Valves
10/05/2023
40,602
FL967
Drag Link Tapered Joint
4/21/2023
46,984
FL969
Windshield Wiper Arms
5/30/2023
68,789
If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry using the Warranty Support Center (WSC) app, located on the DTNA Portal.
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Thomas Built Buses Dealers – U.S. and Canada
Direct Warranty Customers – U.S. and Canada
Detroit Diesel Distributors
Export Distributors
Love’s Travel Stops
If you have questions about this letter, please submit your inquiry using the WSC app on the DTNA Portal.
The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 2 of 2

**************************************************************************************************************

The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Daimler Truck North America LLC
REF #:
ICI23-042
Effective:
10/12/2023
Release:
10/12/2023
SUBJECT:
FL958 and FL966 – Revised Bulletin
This letter is to inform you that a revised bulletin for Recall FL958 and FL966 Brake Modulator Valves is available on DTNAPortal. Please print and use the revised bulletin for all work under FL958 and FL966 from this point forward.
REVISION: The work instruction has been updated for clarification on the special tool needed for repair.
If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry through the WSC link on DTNAPortal.
REF #:
ICI23-042
En vigueur:
12/10/2023
Date de sortie:
12/10/2023
OBJET:
FL958 and FL966 – Bulletin révisé
Cette lettre a pour but de vous informer qu’un bulletin révisé pour le rappel des vannes de modulateur de frein FL958 et FL966 est disponible sur DTNAPortal. Veuillez imprimer et utiliser le bulletin révisé pour tous les travaux sous FL958 et FL966 à partir de maintenant..
RÉVISION: Les instructions de travail ont été mises à jour pour clarifier l’outil spécial nécessaire à la réparation.
Si vous avez des questions ou avez besoin de plus amples informations, contactez le service des campagnes de garantie en soumettant une demande via le lien WSC sur DTNAPortal.
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Thomas Built Buses Dealers – U.S. and Canada
Direct Warranty Customers – U.S. and Canada
Detroit Diesel Distributors
Export Distributors
If you have questions about this Letter, please submit your inquiry on the Web using the WSC Link on DTNA Portal

**************************************************************************************************************

FL958 & FL966 Campaign My Communication 10/04/2023
Colleagues,
DTNA Campaigns will be releasing the Single Modulator Valve (SMV) Campaigns FL958 and FL966 on 10/05/2023. These recall campaigns will replace recall FL855 Braking System Platform Single Modulator Valves and include over 330K vins. Affected vehicles will be inspected and have brake modulator valves replaced, as required.
Due to limited part availability, DTNA will release these campaigns in three separate phases. These campaigns will be released based on NHTSA-defined regional criteria, i.e., “Salt Zones”, geographic regions where road salt is regularly used in the winter.
During the initial release of FL958 and FL966, DTNA will restrict campaign kits to a maximum order quantity (MOQ). The MOQ will limit order volume on the initial campaign release as well as monitor kit orders from dealerships (Kit Part #: 25-FL958-000).
The FL958 and FL966 campaigns will be released as follows:
1. Phase One:
1. DTNA will release all Canadian registered vehicles, dual-certified registered vehicles (US and CA), and FL855 open campaign vehicles. This phase will incorporate 100K units and include the majority of the NHTSA-defined “Salt Zone” vehicles.
2. Phase One Salt Zone States are: CT, ME, MI, MN, NH, NY, PA, RI, and VT.
1. Phase Two:
1. The second phase of FL958 and FL966 is scheduled to release on 01/15/2024, with a total of 100K units.
2. This phase will release the remaining vehicles in the defined salt zone states: DE, IL, IN, IA, MD, MA, MT, ND, NJ, OH, SD, WV, and WI.
3. Phase Two will also include units outside the salt zones with FL855 repairs older than 08/15/2022.
1. Phase Three:
1. The third phase is scheduled to release on 04/01/2024 and will incorporate all remaining units in the FL958 and FL966 populations.
DTNA Campaigns expects a consistent influx of kits for the duration of the campaign, but for now, we request that kit orders only be placed if the vehicle is available for immediate repair. Limiting the number of kits in initial orders will allow for a wider distribution of recall kits to the network, which will subsequently lead to a wider distribution of repairs.
We appreciate your consideration and support in this matter.
DTNA Campaigns

**************************************************************************************************************

The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 1 of 2
Daimler Truck North America LLC
REF #:
ICI23-018R2
Effective:
06/01/2023
Release:
05/23/2023
(2nd Revision: 12/08/2023)
SUBJECT:
(Revised) Love’s Travel Stops Authorized Campaign Program
Revisions are in blue font.
This letter is to inform you that, per the 05/24/2023 joint memo from DTNA and the Dealer Council, DTNA will now allow Love Service Locations to perform select Recall and Field Service Campaigns
Recall campaigns address urgent safety and emission compliance issues. DTNA complies with U.S. and Canadian federal regulations and adheres to all requirements for recall campaign documentation, repair completion, reporting to federal agencies, etc. By adding recall repairs to the Love Service Agreement, regulatory compliance by sponsoring locations and customers is also required.
With approval from sponsoring locations, select Love Service locations are authorized to perform specific Freightliner Campaign repairs. Love Service locations may only do this work with the agreement of their sponsoring locations.
Love sponsoring locations are responsible for the management of this program (i.e., determining whether customer facilities are suitable and identifying the specific, DTNA-approved campaigns that a Love Service location can perform).
The following Recall Campaigns are approved for Love Service Centers:
.
Campaign Number
Campaign Name
Start Date
Open Vehicle Population
FL756
Brake Light Pressure Switch
4/7/2018
104,095
FL791
Freightliner Steering Shafts
11/14/2018
5,149
FL848
Mud Flap Reflective Tape
5/22/2020
30,371
FL855
Braking system Platform Single Mod Valves
9/2/2020
22,730
FL863
Freightliner Brake Light Illumination
8/14/2020
4,924
FL872
Cascadia Bridgestone Steer Tires
3/17/2021
4,387
FL874
M2 Transmission Oil Cooler Line
4/9/2021
8,517
FL900
Cascadia Drag Link Tapered Joint
11/11/2021
20,568
FL958
Brake Modulator Valves
10/05/2023
64,948
FL966
Brake Modulator Valves
10/05/2023
40,602
WARRANTY CAMPAIGNS DEPARTMENT
P.O. Box 4090
800-547-0712
Portland, Oregon 97208-4090
ATTENTION: Dealer Principal, Warranty Manager, Service Manager, Parts Manager
Freightliner Dealers – U.S. and Canada
Western Star and Sterling Dealers – U.S. and Canada
FCCC Dealers – U.S. and Canada
Thomas Built Buses Dealers – U.S. and Canada
Direct Warranty Customers – U.S. and Canada
Detroit Diesel Distributors
Export Distributors
Love’s Travel Stops
If you have questions about this letter, please submit your inquiry using the WSC app on the DTNA Portal.
The information contained in this letter supercedes and supplements any related policies and procedures in any previously
released bulletins, the Warranty Manual, and/or previously released letters. Failure to read or distribute this letter will not
exempt addressees from compliance with the information contained herein.
Page 2 of 2
FL967
Drag Link Tapered Joint
4/21/2023
46,984
FL969
Windshield Wiper Arms
5/30/2023
68,789
If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry using the Warranty Support Center (WSC) app, located on the DTNA Portal.

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DATE: 04/21/2023
TO: My Communication
SUBJECT: Stop Delivery Order: Safety Recall FL966
SAFETY RECALL NOTICE On February 10, 2023, Daimler Truck North America (“DTNA”) filed a Defect Information Report (“DIR”) with the National Highway Traffic Safety Administration (“NHTSA”) and a Defect Information Notice (“DIN”) with Transport Canada (“TC”) informing the agencies of our intent to conduct a voluntary safety recall.
Until further instructions are available, vehicles subject to this “Stop Delivery Order” must be held and not be delivered to customers.
Affected Vehicles:
Make
Model
Model Yr. Start
Model Yr. End
Prod. Start Date
Prod. End Date
Freightliner
114SD
2022
2022
November 9, 2021
November 10, 2021
Freightliner
Cascadia
2017
2023
June 28, 2016
March 31, 2022
Western Star
47X
2021
2023
July 8, 2020
April 8, 2022
Western Star
49X
2020
2023
March 19, 2019
March 29, 2022
Problem:
On the affected vehicles the brake modulator valves on the front axle may corrode, which during a braking event initiated by Electronic Stability Control (ESC) or Roll Stability Control (RSC) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. A full system pressure applied to one front wheel end could lead to a brake pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a crash.
Solution:
Daimler Truck is currently validating the final repair and securing replacement parts. Repairs
will be performed by Daimler Truck North America authorized service facilities, at no charge to the vehicle owner.
Owner Notification Mailing Schedule:
Owner letters were mailed to the affected Customers beginning 04/10/2023.
IMPORTANT NOTE:
Dealers should make their personnel aware of this safety recall. In the event that a dealer has a vehicle included in the safety recall in their inventory to be sold, the condition must be corrected before releasing it to a customer
It is a violation of Federal law for a dealer to deliver a new motor vehicle or any new or used item of motor vehicle equipment (including a tire) covered by this notification under a sale or lease until the defect or noncompliance is remedied.

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Recall FL958 and FL966 SMV Kit Pricing update
10/15/2023 • Campaigns
Colleagues,
DTNA has released Phase I of the FL958 and FL966 SMV recalls; the supporting campaign kit is:
Part Number:
25-FL958-000
Desc:
KIT, FL958, ANODIZED SMV
DTNA is notifying the network of an adjustment made to the released kit pricing.
At issue:
The FL958 and FL966 kits were priced incorrectly and have had a part price adjustment on10/11/2023, which will affect the system price reflected in the Online Warranty Link (OWL). The price reflectedin OWL will show less than the price paid for any orders before 10/11/2023, which were approximately 40 kits.
Solution
: For full recovery on these initial kits Dealerships are instructed to file a recall campaign preapprovalclaim and adjust the claimed price to the amount paid; please also attach a copy of the PDC invoice.
For additional information regarding this adjustment, please refer to:
My Communication:
Pricing (10/13/2023)
Description
: DTNA Aftermarket Parts Pricing FL958 FL966 Update is effective 10/11/2023.
If you have any questions about filing claims regarding this adjustment, please contact the Warranty CampaignsDepartment via Web inquiry at DTNAPortal.com/WSC.
Thank you,
DTNA Campaigns

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC SEP 25, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,167 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUL 08, 2020 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2020-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAR 19, 2019 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : DIESEL
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2019-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : OTHER Power Train : GAS
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUL 19, 2018 – MAR 14, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : Corroded Front Brake SMVs Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Refer attachment. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will be inspected and have brake modulator valves
replaced, as required. Repairs will be released in phases and prioritized based on geographic location, starting with vehicles currently registered in certain states where road salt is regularly used in the winter (CT, ME, MI, MN, NH, NY, PA, RI, VT). Repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized dealer. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Truck North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 16, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 69,246 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2022-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JAN 19, 2022 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JAN 14, 2022 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 10, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,375 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2023 Western Star 47X Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAY 26, 2021 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2021-2023 Western Star 49X Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 17, 2020 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2022 Freightliner 114SD Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or other system-initiated braking, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning NR
that can Occur : Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : NR Address : NR
NR
Country : NR Chronology :
In late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA promptly began an investigation, including investigating drivers and running tests.
On February 6 2023, DTNA received the first indication, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events and the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC. Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production :
Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 15, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,375 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2022 Freightliner 114SD Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2021-2023 Western Star 49X Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 17, 2020 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2023 Western Star 47X Vehicle Type :
Body Style :
Power Train : NR
Descriptive Information : Vehicles with painted front axle modulator valves, that are not equipped with Adaptive Cruise Control (ACC), are recalled for replacement of those valves due to a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAY 26, 2021 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or other system-initiated braking, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning NR
that can Occur : Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

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OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 16, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 69,246 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2022-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JAN 19, 2022 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JAN 14, 2022 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 23, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,167 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2020-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : SEP 22, 2020 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2021-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAY 26, 2021 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population.
On February 20, 2023, DTNA reviewed records, and finalized the population based on the best-known domicile country information. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC MAR 21, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,167 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2020-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAR 19, 2019 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2021-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUL 08, 2020 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population.
On February 20, 2023, DTNA reviewed records, and finalized the population based on the best-known domicile country information. On March 21, 2023 amended manufacturing dates to match model and owner letter table. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 16, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,375 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2017-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2017-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2017-2023 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC MAR 21, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,167 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2021-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUL 08, 2020 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2020-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAR 19, 2019 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population.
On February 20, 2023, DTNA reviewed records, and finalized the population based on the best-known domicile country information. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

**************************************************************************************************************

OMB Control No.: 2127-0004
Part 573 Safety Recall Report 23V-073
The information contained in this report was submitted pursuant to 49 CFR §573
Manufacturer Name : Submission Date :
Daimler Trucks North America, LLC FEB 21, 2023 NHTSA Recall No. : 23V-073 Manufacturer Recall No. : FL966 Manufacturer Information :
Manufacturer Name : Daimler Trucks North America, LLC Address : 4747 N. Channel Avenue
Portland OR 97217-3849
Company phone : 800-745-8000 Population :
Number of potentially involved : 70,167 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2023 Freightliner Cascadia Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : JUN 28, 2016 – MAR 28, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2022-2023 Western Star 47X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : MAY 26, 2021 – MAR 26, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-073 Page 2 Vehicle 3 : 2021-2023 Western Star 49X
Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : SEP 22, 2020 – MAR 29, 2022
VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 4 : 2022-2022 Freightliner 114SD Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES
Body Style :
Power Train : NR
Descriptive Information : Vehicles equipped with system-initiated brake features of Roll Stability Control and Electronic Stability Control, but not equipped with Adaptive Cruise Control (ACC) are recalled for a risk that valve corrosion could cause a sudden brake pull.
Production Dates : NOV 09, 2021 – NOV 10, 2021
VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect :
Description of the Defect : On certain vehicles, chemical corrosion could affect the functionality of the brake modulator valve, which during an external braking event (including Roll Stability Control or Electronic Stability Control, but not including driver- initiated braking) may result in full system pressure applied to one front wheel end causing a brake pull differential in braking force. Regular service brakes are unaffected.
FMVSS 1 : NR FMVSS 2 : NR
Description of the Safety Risk : A full system pressure applied to one front wheel end could lead to a brake
pull resulting in a sudden change in vehicle direction due to uneven system braking on the front axle increasing the risk of a motor vehicle crash.
Description of the Cause : NR Identification of Any Warning
that can Occur : Drivers may observe an ABS malfunction light prior to complete chemical corrosion contamination of the modulator valve. Involved Components : The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073 Page 3 Component Name 1 : Single ABS Modulator Valve Component Description : Quick Release Pneumatic Valve
Component Part Number : WAB472 196 037 0, WAB472 196 025 0 Supplier Identification : Component Manufacturer
Name : ZF Group
Address : 12001 Tech Center Drive
Livonia Michigan 48150 Country : United States Chronology :
Starting in or around September 2022, based upon information gleaned from a different population of vehicles (those equipped with ACC), DTNA investigated whether non-ACC-equipped vehicles could have similar brake pull events. Initial indications, testing, and engineering judgment were that they would not. However in late October 2022, DTNA received a first indication from a driver that a vehicle in this population of vehicles suffered a brake pull. This conflicted DTNA’s indication that this population would not be affected by brake pulls, so in late October 2022, DTNA expanded its investigation, including interviewing drivers and running further tests.
On February 6 2023, DTNA received the first corroboration, a test result under controlled conditions, indicating a possibility of a sudden unexpected brake pull during rare conditions within ESC and RSC events, depending on a number of other factors including environment, speed, driving conditions, and level of valve blockage.
Despite the fact that DTNA has no evidence of field events other than the one driver in October 2022 asserting it happened, and despite the fact that the brake pull differential was not determined to the same degree as was reported during an ACC event, on February 6, 2023, out of abundance of caution, DTNA decided to initiate a new voluntary safety recall to campaign all vehicles equipped with painted and unpainted front brake modulator valves, covering the separate population that are not equipped with ACC.
On February 16, 2023, DTNA reviewed records and amended the population.
On February 20, 2023, DTNA reviewed records, and finalized the population based on the best-known domicile country information. The information contained in this report was submitted pursuant to 49 CFR §573 Part 573 Safety Recall Report 23V-073
Page 4
The information contained in this report was submitted pursuant to 49 CFR §573
Description of Remedy :
Description of Remedy Program : Affected vehicles will receive two front anodized modulator valves (one
each for the left and right). Repairs will be released in phases based on locations of the vehicle and repairs will be performed by Daimler Trucks North America authorized service facilities. Customer notification will be done by first class mail using Daimler Trucks North America records to determine the customers affected. Daimler Truck North America shall be offering a refund for owner-paid repairs covered by this recall if the repair was performed prior to the date indicated in the reimbursement plan, which will be posted with owner’s notification letter. Owners are directed to seek reimbursement through authorized deal. How Remedy Component Differs NR from Recalled Component :
Identify How/When Recall Condition NR was Corrected in Production : Recall Schedule :
Description of Recall Schedule : Customer notification will be made by first class mail using Daimler
Trucks North America records to determine the customers affected.
Planned Dealer Notification Date : APR 10, 2023 – APR 10, 2023
Planned Owner Notification Date : APR 10, 2023 – APR 10, 2023
* NR – Not Reported

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