# NHTSA recall 25V256000

A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.

- Published by: NHTSA \(United States\)
- Campaign number: 25V256000
- Manufacturer's number: SC0477
- Manufacturer: Mack Trucks, Inc.
- Reported: 2025\-04\-17
- Owners notified: 2025\-04\-24
- Component: ENGINE AND ENGINE COOLING:ENGINE:DIESEL
- Units potentially affected: 3
- Part numbers: 24245940

## What is wrong

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.


## What can happen

A detached idler gear can damage the engine, resulting in a stall and increasing the risk of a crash or injury.


## The remedy

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.


## Notes

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.


## Remedy progress the manufacturer reported

- Report: Quarterly report 3, for 2025 quarter 4
- Filed with NHTSA: 2026\-01\-05
- Vehicles in the campaign: 3
- Reported remedied: 3 \(100%\)
- Reported unreachable: 0
- Reported removed: 0

These are the manufacturer's totals for the whole campaign at the end of 2025 quarter 4, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026\-10\-19.

## Vehicles this campaign lists

- [2025 MACK ANTHEM \(AN\)](/makes/mack/anthem/2025/recalls.md). Built 2024\-09\-24 to 2024\-10\-24. Listed as a series or trim of this model.

## Bulletins for the same vehicles and component

A bulletin is the manufacturer's note to its dealers. It is not part of this recall.

- [TSB M\-913\-001 202609](/bulletins/11037730.md), 2026-10-02, Service bulletin
- [S4533 202608](/bulletins/11036596.md), 2026-09-02, Service campaign
- [CBR\-2592\-1 202606](/bulletins/11034135.md), 2026-06-29, Service bulletin
- [CBR 199 202512](/bulletins/11027007.md), 2026-01-05, Service bulletin
- [CBR 2171\-11 202511](/bulletins/11026025.md), 2025-12-03, Service bulletin
- [CBR 199\-6 202511](/bulletins/11026021.md), 2025-12-03, Service bulletin
- [S4533 072025](/bulletins/11021336.md), 2025-08-04, Service campaign
- [CBR 2107\-21 202505](/bulletins/11018813.md), 2025-06-02, Service bulletin
- [CBR 170\-8 202505](/bulletins/11018804.md), 2025-06-02, Service bulletin
- [CBR\-2449 202503](/bulletins/11016347.md), 2025-04-02, Service bulletin

## Check a VIN

- [NHTSA recall lookup by VIN, United States](https://www.nhtsa.gov/recalls)
- [Transport Canada recall search, Canada](https://wwwapps.tc.gc.ca/Saf-Sec-Sur/7/VRDB-BDRV/search-recherche/menu.aspx?lang=eng)

JSON: [/v1/recalls/nhtsa/25V256000](/v1/recalls/nhtsa/25V256000)

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