NHTSA campaign 25V521000 · Mack campaign SC0483
Mack Recall 25V-521: Loss of Steering Control
NHTSA recall 25V521000 (Mack campaign SC0483) was reported by Mack Trucks, Inc. on August 11, 2025, with 32 vehicles potentially affected (per NHTSA). NHTSA's record lists the Mack PIONEER PR (4) and Mack ANTHEM (AN) for model years 2025–2026. Owners were notified on August 21, 2025, per NHTSA.
Updated daily from NHTSA's recall files
Is my vehicle included?
This page lists, by model year, the vehicles NHTSA's recall record names for campaign 25V521000 in the model years try.vin imports (1995 and later); NHTSA's own record can list more. A model year on the list doesn't mean every vehicle of that year is included, and some may already have been repaired.
To see whether a specific vehicle is included and still needs the repair, enter its VIN at nhtsa.gov/recalls.
Free VIN check: decode a VIN to see its year, make and model.
Key facts
- NHTSA campaign
- 25V521000 (also written 25V-521 or 25V521)
- Filed by
- Mack Trucks, Inc.
- Mack campaign number
- SC0483
- Report received
- Potentially affected
- 32 vehicles (per NHTSA)
- Component
- Steering
- Owners notified
Repair completion: 100% (latest rate the manufacturer reported to NHTSA; dataset updated October 21, 2026)
NHTSA cautions against comparing completion rates across recalls or manufacturers. How try.vin reads them.
Vehicles listed for this recall
NHTSA's recall record lists these vehicles for recall 25V521000. try.vin imports model years 1995 and later, so NHTSA's own list can be longer. Model years with a try.vin recall page link to it. Build dates are NHTSA's range for a model year (per NHTSA); a vehicle built in that range is not necessarily included.
Mack
Mack ANTHEM (AN)
- 2025 · Vehicles built November 4, 2024 – November 4, 2024 (per NHTSA)
Mack PIONEER PR (4)
NHTSA's recall notice
As NHTSA's recall record states it for campaign 25V521000.
Defect description
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.
Safety consequence
A loss of steering control increases the risk of a crash.
Manufacturer 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.
Sources
Official NHTSA notice for recall 25V521000
Campaign details come from NHTSA's recall files, which try.vin imports once a day. The plain-language subject and the completion rate come from the U.S. Department of Transportation's Recalls Data dataset. How try.vin reads recall data.