NHTSA recall 21V856000
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 | 21V856000 |
| Manufacturer's number | SC0432 |
| Manufacturer | Mack Trucks, Inc. |
| Reported | 2021-11-03 |
| Owners notified | 2021-12-10 |
| Component | STEERING:HYDRAULIC POWER ASSIST:PUMP |
| Units potentially affected | 79 |
| Part numbers | 21718559 |
| Report | Annual report 3, for 2025 quarter 4 to 2026 quarter 3 |
|---|---|
| Filed with NHTSA | 2026-10-07 |
| Vehicles in the campaign | 79 |
| Reported remedied | 57 (72%) |
| 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 2021 Granite and LR vehicles. A machining defect may cause pressure to build in the power steering pump and break the shaft seal, resulting in a loss of power steering assist.
What can happen
A loss of power steering assist increases the risk of a crash.
The remedy
Dealers will replace the power steering pump, free of charge. Owner notification letters were mailed on December 10, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0432.
Notes
Owners may also contact the National Highway Traffic Safety Administration Vehicle Safety Hotline at 1-888-327-4236 (TTY 1-800-424-9153), or go to www.nhtsa.gov.
| 2021 MACK GRANITE (GR) | Listed as a series or trim of this model. |
|---|---|
| 2021 MACK LR |
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.