Service brakes, hydraulic: foundation components: master cylinder (Raybestos, Napa and AC Delco)
Vehicle equipment recall 20E-042. NHTSA received Brake Parts Inc.’s report on Jun 24, 2020.
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The short answer
NHTSA received Brake Parts Inc.’s report on Jun 24, 2020. Copied from NHTSA on Oct 20, 2026.
Every line below is in NHTSA’s own words, with its source beside it.
What’s wrong with it?
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.
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.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- NHTSA’s part: Service brakes, hydraulic: foundation components: master cylinder.
What should you do?
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.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- How to reach the firm: 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.safercar.gov.
Which ones are recalled?
NHTSA counts 1,339 items potentially involved, across everything this recall names.
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
- Raybestos Brake Master CylinderNHTSA gives no dates made
- Napa Brake Master CylinderNHTSA gives no dates made
- AC Delco Brake Master CylinderNHTSA gives no dates made
Who is recalling it?
- Made by Brake Parts Inc..
NHTSA, Recalls flat file. Released Oct 20, 2026. Updated daily.
What the record doesn’t say
- NHTSA’s recall file doesn’t say whether anyone was hurt.
- Which ones, by part or lot: the recall’s report on NHTSA’s site gives them where the maker did; this file gives part numbers only where its maker listed them.
- How many have been returned or fixed isn’t in the notice.
Hearth Record wrote these lines.
Sources
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National Highway Traffic Safety Administration, Recalls flat file (FLAT_RCL_POST_2010).
Released Oct 20, 2026 and checked Oct 20, 2026. Updated daily. Public domain (U.S. Government work).
Vehicle, car seat, tire and vehicle equipment recalls, owner complaints and crash ratings are from the National Highway Traffic Safety Administration (NHTSA). Copied on Oct 20, 2026.