Daimler Truck

North America LLC

D25M3

Creation Date: 7/22/2025
Revision Date: 12/15/2025

Subject: 2025 HDEP MCM Software Reprogramming

Field Service Campaign

Models Affected
Model Model Prod. Prod.
Make Model Yr. Start | Yr. End | Start Date | End Date
Detroit Diesel January February
Corporation 472.912 2021 2025 | 45,2020 | 21, 2025
Identifying Feature 2021 to 2025 Gen5 DD15 Engines

General Information

On behalf of the DETROIT™ Powertrain Division listed below, Daimler Truck North America LLC (DTNA) has decided that
a defect that relates to emissions exists and is initiating an Field Service Campaign to modify affected vehicles.
«= Detroit Diesel Corporation
« Freightliner Trucks Division
» _ Wholly owned subsidiary/subsidiaries Freightliner Custom Chassis Corporation, Sterling Truck Corporation, Thomas
Built Buses, Western Star Truck Sales, Inc.

PROBLEM: DETROIT™ has found Diesel Particulate Filter failures due to excessive temperatures occurring from
faster than expected particulate matter buildup.
SOLUTION: Updated programming of the Motor Control Module (MCM) will correct this issue.

There are approximately 194,180 vehicles involved.

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.

Please contact Warranty Campaigns for consideration of additional charges prior to performing the repair.

Work Instructions

Please refer to the attached work instructions. Prior to performing this field service campaign, check the vehicle for a gray
completion sticker (Form WAR261).

Replacement Parts

If our records show your dealership has ordered any vehicle(s) involved in field service campaign number D25M3, a list of
the customers and vehicle identification numbers will be available on DTNA Portal. Please refer to this list when ordering
parts for this field service campaign.

No parts are required for this repair.

Page 1
Daimler Truck

North America LLC Field Service Campaign
D25M3

Creation Date: 7/22/2025

Revision Date: 12/15/2025

IMPORTANT - After Repair is Complete:
Attach a gray completion sticker (WAR261) to the base label (WAR259).

If the vehicle does not have a base label, clean a spot on the appropriate location, and attach a base label, prior to
attaching the completion sticker.

If a campaign kit is not required, write the campaign number on a blank sticker and attach it to the base label.
(Failure to install a completion sticker may result in a chargeback of the campaign claim.)

Claim Reimbursement - Labor Allowance

IMPORTANT: OWL must be viewed prior to performing the field service campaign to ensure the vehicle is involved and
the campaign has not been previously completed. Also, check for a completion sticker prior to beginning work.

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.

e In OWL, use the ‘Retrieve’ function and select the appropriate procedure. This will auto-populate the PFP
component code, replacement parts, cause, corrective action and SRT code in OWL.

Table 1 - Claim Reimbursement Table

Claim Type Field Service Campaign
Campaign D25M3
VMRS
Component | 044-003-286
Code
Cause Code | A1-— Campaign
Primary
Failed Part DDC REPROGRAM1
Time
Procedure Allowed SRT Codes Corrective Action
(hours)
INSPECTION ONLY (D25M3) 0.1 996-F241A 06-Inspect
REPROGRAM ONE MODULE (D25M3) 03 996-F241B 12-Repair Recall/Campaign
REPROGRAM TWO MODULES (D25M3) 0.4 996-F241C 12-Repair Recall/Campaign
REPROGRAM THREE MODULES (D25M3) | 0.6 996-F241D 12-Repair Recall/Campaign
REPROGRAM FOUR MODULES (D25M3) ‘| 0.7 996-F241E 12-Repair Recall/Campaign

Page 2
Daimler Truck

North America LLC Field Service Campaign
D25M3

Creation Date: 7/22/2025

Revision Date: 12/15/2025

Claim type is Field Service Campaign.

e — Inthe ‘Campaign’ field, enter the campaign number and appropriate condition code (D25M3).
e — Inthe ‘Primary Failed Part’ field, enter “DDC Reprogram’1”.

e — Inthe ‘Labor’ section, enter the appropriate SRT from the ‘Labor Allowance’ table. Administrative time will be
included automatically using SRT 939-6010A, for 0.4 hours (for RVs) 0.3 hours (for all other vehicles).

e The VMRS Component Code is 044-003-286 and the Cause Code is A1 - Campaign.

e U.S. and Canada — Reimbursement for Prior Repairs. When a customer asks about reimbursement, please do the
following:

e Accept the documentation of the previous repair.

e 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.)

e Submit an OWL Recall Pre-Approval Request for a decision.

e Include the approved amount on your OWL claim in the ‘Other Charges’ section.
e Attach the documentation to the pre-approval request.

e lf approved, submit a ‘based on claim’ for the pre-approval.

e The Dealer is required to reimburse the customer the appropriate amount.

This Field Service Campaign will expire on December 15, 2026. Dealers will be notified of any changes.

IMPORTANT: OWL must be viewed prior to performing the field service campaign to ensure the vehicle is involved and
the campaign has not been previously completed. Also, check for a completion sticker prior to beginning work.

All claims must be submitted within 30 days of the repair and within 30 days of the expiration date of the field service
campaign.

U.S. and Canadian dealers, contact the Warranty Campaigns Department via Web inquiry at DTNAPortal.com/WSC, if
you have any questions or need additional information. Export distributors, submit a Web inquiry or contact your
International Service Manager.

The letter notifying U.S. and Canadian vehicle owners is included for your reference.

Page 3
Daimler Truck
North America LLC

D25M3

Creation Date:
Revision Date:

Field Service Campaign

7122/2025
12/15/2025

Copy of Notice to Owners

Subject: DD15 HDEP MCM Software Reprogramming

Daimler Trucks North America LLC, on behalf of its DETROIT™ Powertrain Division, is initiating a Field Service Campaign
D25M3 to modify engine model powered vehicles manufactured between 2021 and 2025. The campaign will be
performed at the expense of the manufacturer.

Note that trucks already reprogrammed will be excluded from this campaign. Records indicate that your vehicle has one of
the engines affected. Instructions for this Field Service Campaign have been sent to your local Daimler Truck Authorized
Repair Facility, and the labor time required to perform this campaign is approximately 0.7 hours.

Units with a functioning CTP and an active Detroit Connect Portal Subscription may be able to perform this campaign
using over-the-air functionality. Please review your Detroit Connect Portal for assistance with eligible vehicles. Any
additional questions on over-the-air functionality can be submitted to [email protected].

See below for additional details on vehicle applicability:

Models Affected
Model Model Prod. Prod.
aoe EE Yr. Start | Yr. End | Start Date | End Date
Detroit Diesel January | February
Corporation 472.912 2021 2025 | 45,2020 | 21, 2025
Identifying Feature 2021 to 2025 Gen5 DD15 Engines

Please contact a Daimler Truck Authorized Repair Facility and arrange to have the Field Service Campaign performed. To
locate an authorized facility, search online at https://demanddetroit.com/find-a-dealer/

To reduce downtime and ensure the repair facility is prepared to complete the repair upon your arrival, please make an
appointment in advance. Having an appointment enables the repair facility to order and receive the parts required for the
Field Service Campaign.

Progressive damage could result from delayed completion of this campaign. To ensure vehicle functionality and optimal
performance are not compromised, DTNA highly recommends having the campaign completed as soon as possible. To
avoid incurring additional downtime and expenses from progressive damage please complete the campaign in a timely
manner.

This service will be completed for you at no charge, prior to December 15, 2026 under the provisions of this notice.
We have taken this action in the interest of your continued satisfaction with our products.

WARRANTY CAMPAIGNS DEPARTMENT
Enclosure

Page 4
Daimler Truck
North America LLC

D25M3

Creation Date:
Revision Date:

7122/2025
12/15/2025

Subject: 2025 HDEP MCM Software Reprogramming

Field Service Campaign

Models Affected
Model Model Prod. Prod.
Make Model Yr. Start | Yr. End | Start Date | End Date
Detroit Diesel January February
Corporation 472.912 2021 | 2025 | 45,2020 | 21, 2025
Identifying Feature 2021 to 2025 Gen5 DD15 Engines

Work Instructions