Mack automatic high beams (AHB) may not switch to low beam headlights as intended.
The short version
Mack Trucks, Inc. reported a problem with the lighting control module software. Here is what owners need to know.
The automatic high beams (AHB) may not switch to low beam headlights as intended. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, "Lamps, Reflective Devices, and Associated Equipment."
High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.
As an interim action, Mack will update the vehicle software through an over-the-air (OTA) update to disable the AHB feature, free of charge.
Affected vehicles
These model years are included in NHTSA campaign 25V-803.
| YEAR RANGE | MODEL |
|---|---|
| 2026 | Mack Anthem |
| 2025–2026 | 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.