NHTSA recall 25V521000
A recall listed here may apply to a vehicle of this year, make and model. Only the manufacturer can say whether it applies to one vehicle: check the VIN with the official lookups.
| Published by | NHTSA (United States) |
|---|---|
| Campaign number | 25V521000 |
| Manufacturer's number | SC0483 |
| Manufacturer | Mack Trucks, Inc. |
| Reported | 2025-08-11 |
| Owners notified | 2025-08-21 |
| Component | STEERING |
| Units potentially affected | 32 |
| Part numbers | Software Parameter Feature (Oversteer Guidance) P1HF9 |
| Report | Quarterly report 5, for 2026 quarter 3 |
|---|---|
| Filed with NHTSA | 2026-10-07 |
| Vehicles in the campaign | 32 |
| Reported remedied | 32 (100%) |
| Reported unreachable | 0 |
| Reported removed | 0 |
These are the manufacturer's totals for the whole campaign at the end of 2026 quarter 3, as filed with NHTSA. They do not say whether one vehicle has been remedied: check the VIN with the official lookups. The reports are from data as of 2026-10-19.
What is wrong
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.
What can happen
A loss of steering control increases the risk of a crash.
The 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.
| 2025 MACK ANTHEM (AN) | Built 2024-11-04 to 2024-11-04. Listed as a series or trim of this model. |
|---|---|
| 2025 MACK PIONEER PR (4) | Built 2024-10-22 to 2024-11-08. Listed as a series or trim of this model. |
| 2026 MACK PIONEER PR (4) | Built 2025-02-24 to 2025-06-23. Listed as a series or trim of this model. |
A vehicle with no link is not in this site's catalog, which covers cars, multipurpose vehicles and trucks by model year. The campaign is from data as of 2026-10-19.
Bulletins for the same vehicles and component
| S0285 202410 | 2024-11-04. Service campaign. SERVICE CAMPAIGN - Pitman Arm Pinch Bolt Alignment |
|---|---|
| S3949 202406 | 2024-07-03. Service campaign. SC - Steering Stub Shaft Hardware Replacement |
| CBR-2375 202405 | 2024-06-04. Service bulletin. CBR: ZF/TRW Steering Gear Side Cover Leak |
| S3949 202404 | 2024-05-01. Service bulletin. Service Campaign: Steering Stub Shaft Hardware Replacement |
A bulletin is the manufacturer's note to its dealers. It is not part of this recall.