Mack rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and electronic stability control (ESC).
The short version
Mack Trucks, Inc. reported a problem with the antilock control unit/module. Here is what owners need to know.
The rear brake modulators may have unprotected electrical connectors that can short circuit and lead to a loss of the anti-lock brake system (ABS) and electronic stability control (ESC).
A loss of anti-lock brakes and electronic stability control increases the risk of a crash or injury.
Take it to a dealer — they will inspect the rear brake modulator electrical connectors, install a protective cover, and replace the rear brake modulators, as necessary, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 26V-261.
| YEAR RANGE | MODEL |
|---|---|
| 2026–2027 | Mack Anthem |
| 2025–2027 | Mack Pioneer |
What changed
Newest first. The record shows both when the recall began and what has changed since.
- Recall reported to NHTSA. LATEST
Drive one of these? Check your VIN to see if your specific vehicle is affected.
Check your VINWhat this record means
Data from the NHTSA recall database. A clean VIN check means no open federal recalls for that vehicle — not that it never had one.
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MyAutoRecalls is not affiliated with Mack Trucks, Inc. or the National Highway Traffic Safety Administration.