Vehicle recall 25V521000 · August 11, 2025
Mack Pioneer PR (4) and Anthem (an)
The dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering control.
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 Anthem and 2025-2026 Pioneer vehicles. The dynamic steering and oversteer guidance feature may malfunction and cause a loss of steering control.
- Consequence
- A loss of steering control increases the risk of a crash.
- Remedy
- The oversteer guidance feature will be disabled through an over-the-air (OTA) update or by a dealer, free of charge. Owner notification letters were mailed August 21, 2025. Owners may contact Mack's customer service at 1-800-866-1177. Mack's number for this recall is SC0483.
Recall details
- NHTSA campaign
- 25V521000
- Reported to NHTSA
- August 11, 2025
- Filed by
- Mack Trucks, Inc.
- Manufacturer campaign
- SC0483
- Owner notification
- August 21, 2025
- Vehicles potentially affected
- 32
- Initiated by
- the manufacturer
- Components
- Steering
Vehicles covered
As listed by NHTSA. A recall usually covers only some vehicles of each model and year, often a production date range.
- Mack Anthem (an) (2025): 2025
- 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.