Insufficiently crimped brake master cylinder
Defect Summary
Brake parts, inc. (brake parts) is recalling certain brake master cylinders sold under raybestos, napa, and ac delco brands, part numbers mc391232, m4840, and 18m2578, respectively sold as aftermarket replacement parts for 2012-2017 volkswagen beetle, 2005-2018 volkswagen jetta and 2007-2010 volkswagen jetta gli. the crimping of the aluminum housing may be insufficient, allowing the master cylinder piston to pop out of the housing.
Safety Consequence
If the piston pops out of the master cylinder housing, a complete loss of braking or unintended brake application can occur, increasing the risk of a crash. owners may initially notice brake fluid leaking onto the vacuum booster, or a change in brake pedal travel and feel.
Corrective Action
Brake parts will notify the distributors that sold this product, and provide a replacement part, free of charge. the recall began august 13, 2020. owners may contact napa customer service, at 1-800-272-5372; acdelco: gm customer service at 1-815-759-7328; or raybestos customer service at 1-800-323-0354.
Similar Recalls
Other recalls from Brake Parts Inc. or involving Service Brakes, Hydraulic.
FAQ: Recall 20E042000
Your rights, the repair process, and what each field on this page means.
What is recall 20E042000?
NHTSA recall 20E042000 was issued by Brake Parts Inc. on June 24, 2020. It addresses: Insufficiently crimped brake master cylinder. The recall affects approximately 1,339 vehicles, with the defect involving the Service Brakes, Hydraulic component.
How do I get this recall repaired?
Contact any authorized Brake Parts Inc. dealer and reference NHTSA recall ID 20E042000 or the manufacturer campaign number NR (Not Reported). 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.
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.