FL907 Power Stud May Electrically Arc to Bulkhead – 2017-2019 Western Star 4700, 4900, 5700, & 6900 Trucks

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Amended Defect Information Report (Section 573.6) FL-907 Date of Submission: November 12, 2021 (amended January 18, 2022) Manufacturer: Daimler Trucks 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: 2019 Make: Western Star Model: 4700, 4900, 5700 & 6900 Production Dates: Begin: 10/18/2016 End: 02/06/2018 Descriptive Information: Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Number potentially involved: 6,100 Estimated percentage of involve with defect: 1% Defect / Noncompliance Description For this Defect/Noncompliance: Describe the defect or noncompliance: This submission amends the recall remedy in prior DTNA Recall No. FL766 / NHTSA Recall No. 18V-191, moving from an inspect and replace remedy, to replacing the appropriate component in the subject recall population. On certain Western Star vehicles built with a pass through power stud and attached foam gasket seal mounted through the bulkhead, in certain instances a potential exists for contact between the power stud and bulkhead resulting in potential arcing. Describe the safety risk: Arching of a power cable between the stud and bulkhead could increase the risk of a fire. Identify any warning which can precede or occur: N/A If applicable, identify the manufacture of the defective or noncompliant component.: N/A Involved Components Component Name: Pass-Thru Stud Component Description: STUD – PASS-THRU, ELECTRICAL Component Part Number: A23-14242-000, A23-14242-001, A23-14242-002, A23-14242-003 Chronology of Defect / Noncompliance Determination Provide the chronology of events leading up to the defect decision or test data for the noncompliance decision: In or about March 2018, DTNA recalled certain Western Star vehicles (DTNA Recall No. FL766, NHTSA Recall No. 18V-191). The recall remedy involved, among other things, an inspection of the pass through power stud for clearance to the bulkhead, and if required, replacement of the appropriate component. Throughout 2018 and 2019, DTNA met with NHTSA’s Office of Defects Investigation (ODI) in monthly, voluntary SEL meetings where, among other things, DTNA discussed with ODI data and analysis regarding post-recall incidents in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, and the adequacy of the inspect and replace approach was discussed. DTNA continued in good faith to believe the remedy adequate and otherwise did not present further unreasonable risk to safety, and ODI concurred. Later, in or about April 2021, DTNA decided to reconsider the inspect and replace remedy approach given certain new data (identified below), opened an investigation, and added that new investigation to the ODI SEL spreadsheet for discussion with ODI during continued monthly SEL discussions with the agency, as required by the agency’s December 2020 consent order. In or about April to late September 2021, DTNA analyzed plant quality data, field service information, warranty data, and inspected exemplar vehicles. DTNA’s analysis identified the potential that field operator routine maintenance/cleaning using high pressure power-washing equipment could be introducing additional water intrusion risk that was not reasonably foreseen in prior analysis in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, or in discussions with NHTSA ODI, as well as the possibility that field technicians were encountering inspection challenges that were, likewise not reasonably foreseen. DTNA’s analysis continued and, in or about late September 2021, DTNA received a report of an additional thermal event that occurred on a vehicle in March 2021, where it appeared that, the thermal event occurred shortly after the vehicle had been high pressure power washed. DTNA’s analysis further continued, and in early November 2021, DTNA received inspection results on three additional exemplar vehicles, one of which showed a pass though stud that, in DTNA’s judgement, should have been replaced by the field technician, but was not. On Thursday, November 4, 2021, DTNA decided to amend the recall remedy in prior DTNA Recall No. FL766/NHTSA Recall No. 18V-191, moving from an inspect and replace remedy, to replacing the appropriate component in the subject recall population. At all relevant times, as the agency knows from its discussions with the company to date, DTNA in good faith believed the remedy to be adequate and otherwise did not present further unreasonable risk to safety. Identify the Remedy Describe the defect/noncompliance remedy program, including the manufacture’s plan for reimbursement. The pass through power studs will be replaced in the subject population. Repairs will be performed by Daimler Trucks North America authorized service facilities. Details of the reimbursement plan will be included in the owner’s notification letter. 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: 01/09/2022 Planned Dealer Notification End Date: 01/09/2022 Planned Owner Notification Begin Date: 01/09/2022 Planned Owner Notification End Date: 01/09/2022 Manufacture’s identification code for this recall (if applicable): FL-907 DTNA Representative; Tiffani Torgeson Manager Compliance and Regulatory Affairs

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Daimler Trucks North America LLC January 2022 FL907AB NHTSA #21V-882 IMPORTANT SAFETY RECALL See enclosed VIN list Subject: Western Star Power Cable Studs This notice is sent to you in accordance with the requirements of the National Traffic and Motor Vehicle Safety Act. Daimler Trucks North America LLC (DTNA), on behalf of its wholly owned subsidiary, Western Star Truck Sales, Inc., has decided that a defect which relates to motor vehicle safety exists on specific model year 2017-2019 Western Star 4700, 4900, 5700, and 6900 model vehicles manufactured September 12, 2016, through February 6, 2018. On certain vehicles, the bulkhead pass through power cable studs with an attached gasket seal may not protrude through the bulkhead adequately. If improperly installed, the power cable studs may contact the bulkhead, resulting in potential arcing, which may increase the risk of a fire. The bulkhead pass through power cable studs will be replaced. Repairs will be performed by DTNA authorized service facilities. Please contact an authorized DTNA dealer to arrange to have the Recall performed and to ensure that parts are available at the dealership. The Recall will take approximately three hours and will be performed at no charge to you. To locate an authorized dealer, search online at Daimler-TrucksNorthAmerica.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@Daimler.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 Trucks North America LLC Warranty Campaigns Department P.O. Box 4090 Portland, OR 97208-4090 800.547.0712 Phone Daimler Trucks 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 Trucks 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 Trucks North America LLC dealer. Please speak with your Daimler Trucks North America LLC authorized dealer concerning this matter Daimler Trucks North America LLC Warranty Campaigns Department P.O. Box 4090 Portland, OR 97208-4090 800.547.0712 Phone

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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 1 Daimler Trucks North America LLC REF #: ICI22-003 Effective: 01/07/22 Release: 01/07/22 SUBJECT: FL766 – Campaign Replaced by FL907 This letter is to inform you that recall FL766, Western Star Power Cable Studs, was terminated on January 7, 2022. You will now see FL766 marked as “Terminated” in OWL. Recall FL766, which has an “inspect and replace if needed” repair, has been replaced by FL907, Western Star Power Cable Studs, which has a “replace all” repair. Recall FL907 released January 8, 2022, and the bulletin is now visible to dealers on DTNAConnect. Last Repair Date for FL766 Repairs: 01/07/22 First Repair Date for FL907 Repairs: 01/08/22 If you have questions or need further information, contact the Warranty Campaigns Department by submitting an inquiry through the WSC Link on DTNAConnect. 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 I M P O R T A N T C A M P A I G N I N F O R M A T I O N If you have questions about this Letter, please submit your inquiry on the Web using the WSC Link on DTNAConnect

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Subject: Western Star Power Cable Studs Models Affected: Specific model years 2017-2019 Western Star 4700, 4900, 5700, and 6900 model vehicles manufactured September 12, 2016, through February 6, 2018. General Information Daimler Trucks North America LLC (DTNA), on behalf of its wholly owned subsidiary, Western Star Truck Sales, has decided that a defect that relates to motor vehicle safety exists on the vehicles mentioned above. On certain vehicles, the bulkhead pass through power cable studs with an attached gasket seal may not protrude through the bulkhead adequately. If improperly installed, the power cable studs may contact the bulkhead, resulting in potential arcing, which may increase the risk of a fire. The bulkhead pass through power cable studs will be replaced. There are approximately 9,293 vehicles involved in this campaign. 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. If our records show your dealership has ordered any vehicle(s) involved in campaign number FL907, a list of the customers and vehicle identification numbers will be available on DTNAConnect. Please refer to this list when ordering parts for this recall. Table 1 – Replacement Parts for FL907 Campaign Number Kit Number Part Description Part Number Qty. FL907A N/A (1/4) STUD-ASSY,GASKET,JEI28SP0797R A23-14242-006 2 ea (1/4) STUD-ASSY,GASKET,JEI28SP0797B A23-14242-007 1 ea NUT MOUNT,3/4-16UNF,NYLON,RED 23-13770-000 2 ea NUT MOUNT,3/4-16UNF,NYLON,BLK 23-13770-001 1 ea BLANK COMPLETION STICKER WAR260 1 ea FL907B N/A (3/8) STUD-ASSY,GASKET,JEI28SP0339 A23-14242-004 2 ea (3/8) STUD-ASSY,GASKET,JEI28SP0338 A23-14242-005 1 ea NUT MOUNT,3/4-16UNF,NYLON,RED 23-13770-000 2 ea NUT MOUNT,3/4-16UNF,NYLON,BLK 23-13770-001 1 ea BLANK COMPLETION STICKER WAR260 1 ea Table 1 Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 1 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 Procedure Time Allowed (hours) SRT Code Corrective Action FL907AB Replace bulkhead pass through power cable st uds 3.0 996-R130A 12-Repair Recall/Campaign 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 (FL907-A or FL907-B). • In the Primary Failed Part Number field, enter 25-FL907-000. • 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 reimbursement. (See the “Copy of Owner Letter” section of this bulletin for reimbursement guidelines.) • 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. Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 2 U.S. and Canadian dealers, contact the Warranty Campaigns Department via Web inquiry at DTNAConnect.com/WSC, if you have any questions or need additional information. Export distributors, submit a Web inquiry 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. Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 3 Copy of Notice to Owners Subject: Western Star Power Cable Studs For the Notice to U.S. Customers: This notice is sent to you in accordance with the National Traffic and Motor Vehicle Safety Act. For the Notice to Canadian Customers: 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 Trucks North America LLC (DTNA), on behalf of its wholly owned subsidiary, Western Star Truck Sales, has decided that a defect that relates to motor vehicle safety exists on specific model years 2017-2019 Western Star 4700, 4900, 5700, and 6900 model vehicles manufactured September 12, 2016, through February 6, 2018. On certain vehicles, the bulkhead pass through power cable studs with an attached gasket seal may not protude through the bulkhead adequately. If improperly installed, the power cable studs may contact the bulkhead, resulting in potential arcing, which may increase the risk of a fire. The bulkhead pass through power cable studs will be replaced. Repairs will be performed by DTNA authorized service facilities. Please contact an authorized DTNA dealer to arrange to have the Recall performed and to ensure that parts are available at the dealership. The Recall will take approximately three hours and will be performed at no charge to you. To locate an authorized dealer, search online at Daimler-TrucskNorthAmerical.com/contact-us/. Scroll down to “Locate a Dealer,” and select the appropriate brand. You may also confirm you vehicle ‘s involvement ’ in this recall at this 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@Daimler.com. For the Notice to U.S. Customers: 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 to https://www.nhtsa.gov. For the Notice to Canadian Customers: 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 Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 4 ’ 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 Trucks 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 Trucks North America LLC dealer. Please speak with your Daimler Trucks North America LLC authorized dealer concerning this matter. Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 5 Work Instructions Subject: Wester Star Power Cable Studs Models Affected: Specific model years 2017-2019 Western Star 4700, 4900, 5700, and 6900 model vehicles manufactured September 12, 2016, through February 6, 2018. Power Cable Stud Replacement 1. Check the base label (Form WAR259) for a completion sticker for FL907 (Form WAR261) indicating this work has been done. The base label is usually located on the passenger door about 12 inches (30 cm) below the door latch. If a sticker is present, no work is needed. If there is no sticker, proceed with the next step. 2. Park the vehicle on a level surface, shut down the engine, and set the parking brake. Chock the tires. 3. Disconnect the batteries. 4. Open the hood. 5. Locate the power cable stud connectors on the frontwall. Pull back the cover on the power cable stud connector. See Fig. 1. 6. Loosen the dash, then move it back enough to access the frontwall power terminals. For instructions, refer to Group 60 of the Western Star Workshop Manual. Fig. 1, Power Cable Stud Connector Location Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 6 8. Disconnect the cables from the terminals on the outside of the frontwall. 9. Remove the plastic nuts and the studs. 10. Remove the old power cable studs, then replace them with the new power cable studs. IMPORTANT: Replacement studs must be installed with the plastic nut on the inside of the frontwall, regardless of how they were installed prior to this repair. 11. Fully seat each stud in the square hole. A. Disconnect the cables from the terminals inside the cab. Fig. 2, Location of Frontwall Power Terminals (inside the cab) Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 7 7. Disconnect the cables from the terminals inside the cab. See Fig. 2. NOTE: It is not necessary to disconnect wiring or air lines to access the terminals. When moving the dash, be careful not to over-stretch the wire harnesses and/or the air lines. A. Correct Installation B. Incorrect Installation Fig. 3, Installation Inspection Make sure at least one thread protrudes past the plastic nut. Fig. 4, Correctly Installed Pass-Through Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 8 12. Tighten the plastic nuts 80 to 98 lbf·in (904 to 1107 N·cm). Make sure at least one thread is exposed past the plastic nut. See Fig. 3 and Fig. 4. 14. Connect the cables to the terminals inside the cab, then install the nuts. • For 1/4-inch studs, tighten the nuts 48 to 58 lbf·in (542 to 655 N·cm). • For 3/8-inch studs, tighten the nuts 96 to 118 lbf·in (1085 to 1333 N·cm). 15. Install the dash. For instructions, refer to Group 60 of the Western Star Workshop Manual. 16. Clean a spot on the base label (Form WAR259), write the recall number, FL907, on a blank red completion sticker (Form WAR260), and attach it to the base label, indicating this work has been completed. Daimler Trucks North America LLC Recall Campaign January 2022 FL907AB NHTSA #21V-882 Transport Canada #2021-697 Page 9 13. Connect the cables to the terminals on the outside of the frontwall, then install the nuts. • For 1/4-inch studs, tighten the nuts 48 to 58 lbf·in (542 to 655 N·cm). • For 3/8-inch studs, tighten the nuts 96 to 118 lbf·in (1085 to 1333 N·cm).

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-882 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : NOV 12, 2021 NHTSA Recall No. : 21V-882 Manufacturer Recall No. : FL-907 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 : 7,128 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2019 Western Star 4900 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2017-2019 Western Star 4700 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2017-2019 Western Star 5700 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 21V-882 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2017-2019 Western Star 6900 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : This submission amends the recall remedy in prior DTNA Recall No. FL766 / NHTSA Recall No. 18V-191, moving from an inspect and replace remedy, to replacing the appropriate component in the subject recall population. On certain Western Star vehicles built with a pass through power stud and attached foam gasket seal mounted through the bulkhead, in certain instances a potential exists for contact between the power stud and bulkhead resulting in potential arcing. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Arching of a power cable between the stud and bulkhead could increase the risk of a fire. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-000 Component Name 2 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-001 Part 573 Safety Recall Report 21V-882 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-002 Component Name 4 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-003 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In or about March 2018, DTNA recalled certain Western Star vehicles (DTNA Recall No. FL766, NHTSA Recall No. 18V-191). The recall remedy involved, among other things, an inspection of the pass through power stud for clearance to the bulkhead, and if required, replacement of the appropriate component. Throughout 2018 and 2019, DTNA met with NHTSA’s Office of Defects Investigation (ODI) in monthly, voluntary SEL meetings where, among other things, DTNA discussed with ODI data and analysis regarding post-recall incidents in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, and the adequacy of the inspect and replace approach was discussed. DTNA continued in good faith to believe the remedy adequate and otherwise did not present further unreasonable risk to safety, and ODI concurred. Later, in or about April 2021, DTNA decided to reconsider the inspect and replace remedy approach given certain new data (identified below), opened an investigation, and added that new investigation to the ODI SEL spreadsheet for discussion with ODI during continued monthly SEL discussions with the agency, as required by the agency’s December 2020 consent order. In or about April to late September 2021, DTNA analyzed plant quality data, field service information, warranty data, and inspected exemplar vehicles. DTNA’s analysis identified the potential that field operator routine maintenance/cleaning using high pressure power-washing equipment could be introducing additional water intrusion risk that was not reasonably foreseen in prior analysis in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, or in discussions with NHTSA ODI, as well as the possibility that field technicians were encountering inspection challenges that were, likewise not reasonably foreseen. Part 573 Safety Recall Report 21V-882 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Chronology continued on PDF copy Description of Remedy : Description of Remedy Program : The pass through power studs will be replaced in the subject population. Repairs will be performed by Daimler Trucks North America authorized service facilities. Details of the reimbursement plan will be included in the owner’s notification letter. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR 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 : JAN 09, 2022 – JAN 09, 2022 Planned Owner Notification Date : JAN 09, 2022 – JAN 09, 2022 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 21V-882 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Daimler Trucks North America, LLC Submission Date : JAN 18, 2022 NHTSA Recall No. : 21V-882 Manufacturer Recall No. : FL-907 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 : 6,100 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2017-2019 Western Star 4700 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2017-2019 Western Star 4900 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2017-2019 Western Star 5700 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 21V-882 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2017-2019 Western Star 6900 Vehicle Type : BUSES, MEDIUM & HEAVY VEHICLES Body Style : Power Train : NR Descriptive Information : Certain Western Star vehicles built with a pass through power stud that were within the population of FL766. Production Dates : OCT 18, 2016 – FEB 06, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : This submission amends the recall remedy in prior DTNA Recall No. FL766 / NHTSA Recall No. 18V-191, moving from an inspect and replace remedy, to replacing the appropriate component in the subject recall population. On certain Western Star vehicles built with a pass through power stud and attached foam gasket seal mounted through the bulkhead, in certain instances a potential exists for contact between the power stud and bulkhead resulting in potential arcing. FMVSS 1 : NR FMVSS 2 : NR Description of the Safety Risk : Arching of a power cable between the stud and bulkhead could increase the risk of a fire. Description of the Cause : NR Identification of Any Warning that can Occur : NR Involved Components : Component Name 1 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-000 Component Name 2 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-001 Part 573 Safety Recall Report 21V-882 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 Component Name 3 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-002 Component Name 4 : Pass-Thru Stud Component Description : STUD – PASS-THRU, ELECTRICAL Component Part Number : A23-14242-003 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : In or about March 2018, DTNA recalled certain Western Star vehicles (DTNA Recall No. FL766, NHTSA Recall No. 18V-191). The recall remedy involved, among other things, an inspection of the pass through power stud for clearance to the bulkhead, and if required, replacement of the appropriate component. Throughout 2018 and 2019, DTNA met with NHTSA’s Office of Defects Investigation (ODI) in monthly, voluntary SEL meetings where, among other things, DTNA discussed with ODI data and analysis regarding post-recall incidents in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, and the adequacy of the inspect and replace approach was discussed. DTNA continued in good faith to believe the remedy adequate and otherwise did not present further unreasonable risk to safety, and ODI concurred. Later, in or about April 2021, DTNA decided to reconsider the inspect and replace remedy approach given certain new data (identified below), opened an investigation, and added that new investigation to the ODI SEL spreadsheet for discussion with ODI during continued monthly SEL discussions with the agency, as required by the agency’s December 2020 consent order. In or about April to late September 2021, DTNA analyzed plant quality data, field service information, warranty data, and inspected exemplar vehicles. DTNA’s analysis identified the potential that field operator routine maintenance/cleaning using high pressure power-washing equipment could be introducing additional water intrusion risk that was not reasonably foreseen in prior analysis in DTNA Recall No. FL766/NHTSA Recall No. 18V-191, or in discussions with NHTSA ODI, as well as the possibility that field technicians were encountering inspection challenges that were, likewise not reasonably foreseen. Part 573 Safety Recall Report 21V-882 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 Chronology continued on PDF copy Description of Remedy : Description of Remedy Program : The pass through power studs will be replaced in the subject population. Repairs will be performed by Daimler Trucks North America authorized service facilities. Details of the reimbursement plan will be included in the owner’s notification letter. How Remedy Component Differs from Recalled Component : NR Identify How/When Recall Condition was Corrected in Production : NR 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 : JAN 09, 2022 – JAN 09, 2022 Planned Owner Notification Date : JAN 09, 2022 – JAN 09, 2022 * NR – Not Reported

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