The defect
Mack Trucks, Inc. (Mack) is recalling certain 2026 Anthem (4) and 2025-2026 Pioneer vehicles. 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."
The risk
High beam headlights that do not switch to low beam as intended can reduce visibility for oncoming traffic, increasing the risk of a crash.
The remedy
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. Owner letters were mailed May 29, 2026. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0488. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning November 27, 2025.
NHTSA's own wording · initiated by MFR
Vehicles covered
| Model | Model years |
|---|---|
| Mack Anthem AN (4) | 2026 |
| Mack Pioneer PR (4) | 2025, 2026 |
Components: EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE
Model years in this recall
NHTSA complaints and the number of recall campaigns for each model year this recall covers.
| Model | Year | Complaints | Recalls |
|---|---|---|---|
| Mack Anthem AN (4) | 2026 | 0 | 4 |
| Mack Pioneer PR (4) | 2025 | 0 | 12 |
| Mack Pioneer PR (4) | 2026 | 0 | 9 |
Other exterior lighting recalls in 2025
52 of the 891 recall campaigns reported to NHTSA in 2025 concerned the exterior lighting; Mack Trucks, Inc. filed 118 campaigns in all.
| 25V885000 18 Dec 2025 | Ford Motor Company |
| 25V890000 18 Dec 2025 | Altec Industries, Inc. |
| 25V845000 9 Dec 2025 | Chrysler (FCA US, LLC) |
| 25V831000 1 Dec 2025 | Ford Motor Company |
| 25V804000 20 Nov 2025 | Volvo Trucks North America |
| 25V756000 3 Nov 2025 | Mack Trucks, Inc. |
| 25V757000 3 Nov 2025 | Volvo Trucks North America |
| 25V755000 3 Nov 2025 | McNeilus Truck & Manufacturing, Inc. |
NHTSA recalls (public domain) · all recalls of 2025