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Service bulletins for the 2025 Mack Anthem

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.

66 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Bulletins, newest first
TSB M-913-001 2026092026-10-02. Service bulletin. ENGINE; POWER TRAIN. Parker engine-mounted hydraulic pump service bulletin.
S4533 2026082026-09-02. Service campaign. ENGINE. Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound (TC) engine may experience TC Double Idler Gear failure due to incorrect bearing preload. TC units within this population are suspected to be affected, which could result in failure and potential engine damage. For the affected vehicle population, please follow the instructions provided below to remove the TC unit, replace the double idler gear with a new one, and reinstall the TC unit.
CBR 159 2026082026-09-01. Service bulletin. ELECTRICAL SYSTEM. Mack Trucks Equipped With A Cummins Engine - Engine Preheat Icon Does Not Illuminate In The Instrument Cluster (IC) During Engine Pre-heat (Intake Air Heater) Operation - Vehicles With 2018Instrument Cluster Update, Model Year2018 And Newer
CBR-2592-1 2026062026-06-29. Service bulletin. ENGINE. The purpose of this CBR is to provide steps on how to correct a customer complaint of DTC P107B86 accompanied With intermittent loss of throttle.
CBR 2575-1 2026042026-05-05. Service bulletin. STRUCTURE:BODY; UNKNOWN OR OTHER. CBR - Mack Chassis - Dash Panel Cracking at Mounting to BIW.
CBR 2573-1 2026042026-05-05. Service bulletin. POWER TRAIN. CBR - Mack Chassis - Through Shaft Bearing Retainer Breakage On Mack Carriers.
CBR 2362-3 2026042026-05-04. Service bulletin. POWER TRAIN. CBR - Mack Carrier Nut Adhesive Change.
CBR 2246-5 0320262026-04-02. Service bulletin. SUSPENSION. CBR - Z Spring Bracket Wear.
CBR 2218-6 0320262026-04-02. Service bulletin. POWER TRAIN. CBR - Parker F3 Hydraulic Pump Troubleshooting.
CBR 2712-7 0320262026-04-02. Service bulletin. ELECTRICAL SYSTEM; UNKNOWN OR OTHER. CBR - No Start Condition After Over the Air Programing.
S4373 0220262026-03-03. Service campaign. STRUCTURE:BODY. SC - Mack Trucks has determined that certain Mack sleeper cab assemblies were possibly manufactured with an insufficient number of welds across the rear flange of the upper header
S4342 0220262026-03-03. Service campaign. FUEL/PROPULSION SYSTEM. SC - Mack Trucks has determined that a select group of trucks were built with an AHI Module fuel pressure sensor which does not meet our specifications.
CBR 2432-2 2026012026-02-03. Service bulletin. STRUCTURE:BODY; VISIBILITY/WIPER. CBR - Mack Chassis - AN And GR Models - Door Glass Shattering.
S4270 2025122026-01-06. Service campaign. ELECTRICAL SYSTEM. SC - Electric Exhaust Heater Control Unit Update
CBR 199 2025122026-01-05. Service bulletin. ENGINE. Vehicles affected by this issue will show coolant runoff on the front rights side of the engine.
CBR 2171-11 2025112025-12-03. Service bulletin. ENGINE; ELECTRICAL SYSTEM. CBR - Mack Temperature Sensor Troubleshooting Guide
CBR 199-6 2025112025-12-03. Service bulletin. ENGINE. CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing.
S4632 1020252025-11-03. Service campaign. SEAT BELTS. SC - The vehicle’s seat belt tether may have been assembled with incorrect hardware.
CBR 2517-1 1020252025-11-03. Service bulletin. VISIBILITY/WIPER. CBR - Wiper Linkage Inspection.
CBR 2496 0920252025-10-01. Service bulletin. ELECTRICAL SYSTEM. The purpose of this CBR is outline the interim software solution for PR(4) andAN(4). Note that this document is subject to updates and currently covers Service Pack updates to B2_T2_1.2.
CBR 2172-5 0820252025-09-02. Service bulletin. ELECTRICAL SYSTEM. CBR - When an OTA (Over-The-Air) job starts to program the VECU blocks the starter relay out, if the job ends in a Critical failure, the vehicle will remain in Safe State.
S4533 0720252025-08-04. Service campaign. ENGINE. SC - Mack Trucks has determined that certain AN model trucks equipped with an MP8 Turbo Compound (TC) engine may experience TC Double Idler Gear failure due to incorrect bearing preload.
CBR 407 0720252025-08-04. Service bulletin. SERVICE BRAKES; ELECTRICAL SYSTEM. CBR - To correct the MID136 SID 66 FMI 7 fault code the latest Bendix VCP file will need to downloaded.
CBR 2488 0720252025-08-04. Service bulletin. ELECTRICAL SYSTEM. CBR - A significant GPS reporting issue is affecting fleet operations, with trucks maintaining back-office communication but failing to transmit GPS location data.
CBR 2464-1 2025052025-06-02. Service bulletin. POWER TRAIN. Mack Chassis - Rear Axle Overheat

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.