Brake pedal cotter pin not installed properly
Defect Summary
Mack trucks, inc. (mack) is recalling certain 2020-2022 mack md vehicles. the cotter pin that retains the brake pedal clevis pin may not have been properly installed, which could result in an unsecured brake pedal.
Safety Consequence
An unsecured brake pedal can cause a loss of braking ability and increase the risk of a crash.
Corrective Action
Owners are advised to not drive their vehicles until the remedy has been performed. dealers will inspect the cotter pin installation and repair it as necessary, free of charge. owner notification letters were mailed on september 13, 2021. owners may contact mack's customer service at 1-800-866-1177. mack's number for this recall is sc0429.
Similar Recalls
Other recalls from Mack Trucks, Inc. or involving Service Brakes, Hydraulic.
FAQ: Recall 21V684000
Your rights, the repair process, and what each field on this page means.
What is recall 21V684000?
NHTSA recall 21V684000 was issued by Mack Trucks, Inc. on September 1, 2021. It addresses: Brake pedal cotter pin not installed properly. The recall affects approximately 2,823 vehicles, with the defect involving the Service Brakes, Hydraulic component.
How do I get this recall repaired?
Contact any authorized Mack Trucks, Inc. dealer and reference NHTSA recall ID 21V684000 or the manufacturer campaign number SC0429. Under federal law, the repair is completely free regardless of vehicle age or owner history.
Is my vehicle included in this recall?
The only way to confirm is to look up your 17-character VIN at nhtsa.gov/recalls. NHTSA's tool will tell you if VIN-by-VIN this exact recall applies.
What does "Do Not Drive" mean for this recall?
NHTSA has flagged this recall as Do Not Drive, meaning the defect poses an immediate safety risk and affected vehicles should not be operated until they are repaired. Owners should contact their dealer immediately and may be eligible for free towing or a loaner vehicle while awaiting parts.
How long do I have to get a recall repair done?
There is no expiration on most federal safety recalls. Even if your vehicle is years old and you bought it used, the manufacturer is required to perform the repair at no cost.
Where does the data on this page come from?
All information on this page is sourced directly from the U.S. Department of Transportation public dataset for NHTSA recalls. Last refreshed: 2026-05-22. For the most current official notice, visit nhtsa.gov/recalls.