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Data through Oct 2026
Campaign 21V-953

Brake control valve air leak into the attached exhaust hose can create excessive back pressure, causing the parking brake to release unexpectedly

View NHTSA filingAll Mack Trucks campaigns
Defect summary

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.

Consequence

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.

Source: NHTSA ODI recalls file, campaign 21V953000. Text as published by NHTSA.
Vehicles covered

4 product lines are covered

Owner complaints filed with NHTSA about brakes on these vehicles: 0, of which 0 involved a crash, fire, injury or death. Complaints are not verified by NHTSA.

Vehicles covered by campaign 21V-953
MakeModelModel yearsComplaints on this component
MackMRU2008 to 20100
MackTE2019 to 20210
MackTerrapro (MRU)2011 to 20190
MackTerrapro (TE)20220
Source: NHTSA ODI recalls and complaints files. Equipment, tire and child-seat campaigns list products, not vehicles.