Broken shaft seal may cause loss of power steering
Defect Summary
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.
Safety Consequence
A loss of power steering assist increases the risk of a crash.
Corrective Action
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.
Similar Recalls
Other recalls from Mack Trucks, Inc. or involving Steering.
FAQ: Recall 21V856000
Your rights, the repair process, and what each field on this page means.
What is recall 21V856000?
NHTSA recall 21V856000 was issued by Mack Trucks, Inc. on November 3, 2021. It addresses: Broken shaft seal may cause loss of power steering. The recall affects approximately 79 vehicles, with the defect involving the Steering component.
How do I get this recall repaired?
Contact any authorized Mack Trucks, Inc. dealer and reference NHTSA recall ID 21V856000 or the manufacturer campaign number SC0432. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.