NHTSA Recall 21V953000: Parking brake
Mack Trucks, Inc. reported this safety recall to NHTSA on , covering an estimated 20,668 vehicles. It affects 4 models including the Mack Mru.
| NHTSA campaign | 21V953000 |
|---|---|
| Manufacturer campaign | SC0433 |
| Component | PARKING BRAKE |
| Report received | December 9, 2021 |
| Owner notification | February 8, 2022 |
| Initiated by | NHTSA Office of Defects Investigation |
Defect
Mack Trucks, Inc. (Mack) is recalling certain 2008-2019 TerraPro (MRU) and 2019-2022 TerraPro (TE) vehicles. A brake control valve air leak into the attached exhaust hose can create excessive back pressure, causing the parking brake to release unexpectedly.
Safety risk
The unexpected release of the parking brake may allow the vehicle to rollaway, increasing the risk of a crash.
Remedy
Dealers will remove the exhaust tube and fitting from the valve, free of charge. Owner notification letters were mailed February 8, 2022. Owners may contact Mack customer service at 1-800-866-1177. Mack's number for this recall is SC0433.
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.
Vehicles covered by recall 21V953000
| Make and model | Model years |
|---|---|
| Mack Mru | 2008, 2009, 2010 |
| Mack Te | 2019, 2020, 2021 |
| Mack Terrapro (mru) | 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 |
| Mack Terrapro (te) | 2022 |
Being listed here means the campaign covers the model year, not that every car was built with the defect or is still unrepaired. Enter your VIN above to check your specific vehicle. Recall repairs are free at authorised dealers. Source: NHTSA, October 2026.