The Recall Desk
Our severity:SevereNHTSA·21V953000·Announced 2021-12-09

Mack Trucks Recalls TerraPro Models Due to Parking Brake Release Risk

Mack Trucks is recalling certain TerraPro vehicles because a brake control valve air leak can cause the parking brake to release unexpectedly, increasing the risk of a crash.

What this means for you

Our assessment, not the agency’s: severity 4/5 (Severe).

The hazard poses a serious risk of illness, injury, or structural failure. Stop using the product immediately and contact the manufacturer for a refund or repair.

Our severity reasoning: The recall involves a structural vehicle defect (parking brake failure) that can cause the vehicle to roll away, increasing the risk of a crash, which aligns with the 'Severe' criteria for significant injury risk.

Plain-English summary

Mack Trucks, Inc. is recalling certain 2008-2019 TerraPro (MRU) and 2019-2022 TerraPro (TE) vehicles. The recall addresses a defect where a brake control valve air leak into the attached exhaust hose can create excessive back pressure. This condition can cause the parking brake to release unexpectedly.

The unexpected release of the parking brake may allow the vehicle to roll away, increasing the risk of a crash. The affected vehicles include the TerraPro (MRU) and TerraPro (TE) models manufactured between 2008 and 2022.

Dealers will remove the exhaust tube and fitting from the valve free of charge. Owner notification letters were mailed on February 8, 2022. Owners may contact Mack customer service at 1-800-866-1177 or the NHTSA Vehicle Safety Hotline at 1-888-327-4236. Mack's number for this recall is SC0433.

The recalled product

Product
MACK TERRAPRO (MRU), TE, MRU, TERRAPRO (TE)
Brand
MACK
Manufacturer
Mack Trucks, Inc.
Category
Vehicle — Heavy-Duty Truck
Hazard
Affected units
20,668

Is your product affected?

Check your packaging against the codes below. If any of them match, the product is part of this recall.

Model numbers (4)

  • TERRAPRO (MRU)
  • TE
  • MRU
  • TERRAPRO (TE)

Distribution

Distributed nationwide across the United States.

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