2025 Mack Anthem (an), 2025–2026 Mack Pioneer PR (4) Recall: Dynamic steering and oversteer guidance feature may malfunction and cause…
NHTSA campaign 25V521000 · Steering · filed Aug 11, 2025 · verified Jul 30, 2026
The defect
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.
The risk
A loss of steering control increases the risk of a crash.
Check whether your specific vehicle is affected
Recall campaigns often cover only certain VIN ranges. Enter your VIN on the official NHTSA site to confirm whether your vehicle is included and whether the repair is still open.
Check VIN on NHTSA →The fix — what to do
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.
Affected vehicles
| Make | Model | Model years |
|---|---|---|
| Mack | Anthem (an) | 2025 |
| Mack | Pioneer PR (4) | 2025, 2026 |
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Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 25V521000 (manufacturer number SC0483). Data last verified Jul 30, 2026.