Lighting control module: softwareRecall 25V-803 · Mack vehicles
Mack Trucks, Inc. recall 25V-803 covers 247 Mack vehicles for a lighting control module: software problem, reported to NHTSA on November 20, 2025. The manufacturer's latest report (2026 Q3) shows 80% of affected vehicles repaired.
Source: NHTSA recall 25V803000 and manufacturer quarterly reports. Started by the manufacturer.
The problem
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 fix
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.
Recall repairs are free. Confirm whether this recall is open on your vehicle by entering its VIN at nhtsa.gov/recalls.
How fast cars are being fixed
80%repaired
Share of affected vehicles repaired in each quarterly report the manufacturer filed with NHTSA.
Vehicles in this recall
Built from October 22, 2024 to November 3, 2025. Not every vehicle in these model years is included; check by VIN.