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Service bulletin CBR 2503 092025

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id11023456
Published by NHTSA2025-10-01
Manufacturer's numberCBR 2503 092025
Manufacturer's date2025-09-19
NHTSA componentSERVICE BRAKES

NHTSA's summary

The purpose of this CBR is to outline the steps for adjusting brake pedal freeplay following Foot Brake Modulator (FBM) replacement or when diagnostic code C10C3-77is present.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Brakes

Trouble codes named

C10C3

Vehicles listed
MACK ANTHEM AN (4)2026 (the catalog's model; the bulletin names a series or trim of it)
MACK PIONEER PR (4)2025, 2026 (the catalog's model; the bulletin names a series or trim of it)

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
26V6200002026-09-28. SERVICE BRAKES, ELECTRIC:SOFTWARE/PROGRAMMING
20262042026-04-23. Brakes
26V2610002026-04-23. SERVICE BRAKES, AIR:ANTILOCK:CONTROL UNIT/MODULE
25V0260002025-01-21. SERVICE BRAKES, AIR:SUPPLY:RESERVOIR/TANK
24V7920002024-10-23. ELECTRICAL SYSTEM:SOFTWARE; SERVICE BRAKES, HYDRAULIC:ANTILOCK/TRACTION CONTROL/ELECTRONIC LIMITED SLIP:CONTROL UNIT/MODULE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
CBR 2599 2026082026-09-01. Service bulletin. The purpose of this CBR is to provide support for complaints of trailer braking aggressively.
TSB M-590-001 0720262026-08-03. Service bulletin. TSB - Wheel Speed Sensor Fitting And Cable Clamping.
CBR 2585-1 2026052026-06-02. Service bulletin. CBR to provide support for fault codes C106718 and/or C106818.
CBR 2569-3 2026042026-05-05. Service bulletin. CBR - Brake Pad Wear Indicator DTC C107E68.
CBR 2570-1 0320262026-04-02. Service bulletin. CBR - EBS - Electro-Pneumatic Module - Signal Compare Failure DTC C109562 - AN (4) - PR.
CBR 2443-3 2026012026-02-03. Service bulletin. CBR - Trailer Tandem Adjustment Procedure - PR (4) - AN (4).
CBR 407 0720252025-08-04. Service bulletin. CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
CBR 2443 0720252025-08-04. Service bulletin. CBR - The truck’s trailer detection system uses a brief pulse of compressed air through the red trailer supply line to detect a connected trailer, but this pulse can inadvertently re-lock air-actuated tandem slide systems; this procedure outlines a method to mitigate the issue while sliding the trailer tandems.
CBR 2408 0720252025-08-04. Service bulletin. CBR - This document provides guidance for addressing the Air Production􀁡Modulator (APM) DTC C10129B fault, "High/Excessive Flow" This fault was introduced by a previous APM software package and requires specific containment actions.
CBR-407 2024092024-10-03. Service bulletin. CBR: To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP fi le will need to be downloaded.