2025–2026 Mack Pioneer PR (4) recall: lights
⚠️ What's wrong
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.
💥 The risk
Trailer tail lights and turn signals that do not illuminate as intended can reduce visibility to other drivers, increasing the risk of a crash.
🔧 The fix
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.
Is the fix free? Yes. Safety recall repairs are free at any authorized dealer under federal law, including parts and labor. (Vehicles more than 15 years old when the recall was announced can be excluded, but most manufacturers still fix them.)
- NHTSA campaign
- 25V622000
- Manufacturer recall #
- SC0484
- Manufacturer
- Mack Trucks, Inc.
- Vehicles affected
- 156
- Component
- EXTERIOR LIGHTING:LIGHTING CONTROL MODULE
- Owner phone
- 1-800-866-1177
- NHTSA hotline
- 1-888-327-4236
- Owner letters mailed
- Nov 19, 2025
- Recall started by
- ODI