2025 Mack Anthem (an) Recall: Idler gear bracket fasteners may have been improperly tightened, allowing…
NHTSA campaign 25V256000 · Engine and Engine Cooling · filed Apr 17, 2025 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2025 Anthem (AN) vehicles. The idler gear bracket fasteners may have been improperly tightened, allowing the idler gear to detach from the engine.
The risk
A detached idler gear can damage the engine, resulting in a stall and increasing the risk of a crash or injury.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
Dealers will inspect and replace the turbo compound units as necessary, free of charge. Owner notification letters are expected to be mailed April 24, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0477.
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 888-327-4236 (TTY 888-275-9171) or go to nhtsa.gov.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Mack | Anthem (an) | 2025 |
Related recalls
More Mack Anthem (an) recalls
- 2026 Mack Anthem (an) and 4 other models — Wheel lug nuts may loosen and allow the wheel to detach
- 2019–2025 Mack Anthem (an) and 4 other models — Seat belt anchorage bracket may be improperly welded
- 2025 Mack Anthem (an) and 1 other model — Dynamic steering and oversteer guidance feature may…
- 2025 Mack Anthem (an) and 1 other model — Power cables may have been improperly routed, which can…
- 2020–2025 Mack Anthem (an) and 4 other models — Electrical noise and low signal to the power line carrier…
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 25V256000 (manufacturer number SC0477). Data last verified Jul 30, 2026.