2021 Mack Granite (GR), 2021 Mack LR, 2021 Mack TE Recall: Rear drive axle may have the incorrect type of brake cam installed, which…
NHTSA campaign 21V573000 · Service Brakes, Air · filed Jul 27, 2021 · verified Jul 30, 2026
The defect
Mack Trucks, Inc. (Mack) is recalling certain 2021 Granite, LR, and TerraPro vehicles. The rear drive axle may have the incorrect type of brake cam installed, which could result in inoperative rear axle brakes.
The risk
Inoperative rear axle brakes can increase the distance required to stop, increasing 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
Dealers will inspect the brake cams, and incorrect brake cams will be replaced, along with brake shoes, hardware, and wheel seals, as necessary, free of charge. Owner notification letters were mailed on August 10, 2021. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0427.
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.
Affected vehicles
Related recalls
More Mack Granite (GR) recalls
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- 2019–2025 Mack Anthem (an) and 4 other models — Seat belt anchorage bracket may be improperly welded
- 2025 Mack Anthem (an) and 1 other model — Power cables may have been improperly routed, which can…
- 2020–2025 Mack Anthem (an) and 4 other models — Electrical noise and low signal to the power line carrier…
Other campaigns involving Mack vehicles
Source: NHTSA recall database, campaign 21V573000 (manufacturer number SC0427). Data last verified Jul 30, 2026.