If the piston pops out of the master cylinder housing, a change in brake pedal travel and feel may result, including increased pedal effort and reduced brake function, increasing the risk of a crash.

Service Brakes, Hydraulic — Foundation Components — Master Cylinder

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. Due to insufficient crimping of the aluminum housing, the master cylinder piston may not be properly secured, causing a loss of braking ability and allowing brake fluid to leak into the vacuum booster.
Brake Parts will notify the distributors that sold this product. The manufacturer has yet to develop a remedy for this recall. The recall is expected to begin August 10, 2020. Owners may contact Brake Parts customer service at 1-815-363-9000.
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Date Announced
JUN 24, 2020
Vehicles Affected
NHTSA Campaign #
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