Mack Trucks – Broken Shaft Seal May Cause Loss of Power Steering

Mack Trucks (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.


Report Received Date 11/03/2021
NHTSA ID 21V856000
Consequence Summary 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.
Recall Code SC0432
Potentially Affected 79
Fire Risk When Parked No
Do Not Drive No
Recall Link Go to Recall (https://www.nhtsa.gov/recalls?nhtsaId=21V856000)

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