Vehicle recall 25V622000 · September 18, 2025
2025-2026 Mack Pioneer PR (4)
When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control module.
Source: NHTSA data as of September 22, 2026. Last refreshed Sep 23, 2026, 2:43 AM UTC.
- Summary
- Mack Trucks, Inc. (Mack) is recalling certain 2025-2026 Pioneer vehicles. When towing a trailer, the trailer lights may fail to illuminate due to an improperly manufactured body control module.
- Consequence
- Trailer tail lights and turn signals that do not illuminate as intended can reduce visibility to other drivers, increasing the risk of a crash.
- Remedy
- Dealers will replace the trailer body input/output module, free of charge. Owner letters were mailed November 19, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0484.Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning September 25, 2025.
Recall details
- NHTSA campaign
- 25V622000
- Reported to NHTSA
- September 18, 2025
- Filed by
- Mack Trucks, Inc.
- Manufacturer campaign
- SC0484
- Owner notification
- November 19, 2025
- Vehicles potentially affected
- 156
- Initiated by
- NHTSA’s Office of Defects Investigation
- Components
- Exterior lighting › Lighting control module
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack Pioneer PR (4) (2025-2026): 2026, 2025
Has your Mack been repaired?
Recalls here come from NHTSA’s records for the model and year. Not every vehicle of a model is included in every recall, and this site can’t see whether a repair has been done. Only a VIN lookup can tell you that.
NHTSA’s VIN search doesn’t show recalls that were already repaired, recalls more than 15 years old, or some small manufacturers’ recalls. A Mack dealer can also check your VIN. Recall repairs are free.