Brake Parts Inc. (BPI) is recalling certain Hydro-Max brake master cylinders branded as

1) Raybestos p/n MC390565,
2) NAPA p/n 390565,
3) Carquest p/n E151557
4)GM AC Delco p/n 18M870.

These cylinders contain a 2.0 inch bore and 84 cubic inch reservoir equipped with a brake fluid level indicator switch and without a differential pressure switch, manufactured between July 1, 2011 and April 12, 2012.

The brake fluid level indicator (FLI) may not properly detect a low brake fluid level situation and warn the driver. If the brake system develops an external leak, it may result in a loss of brake fluid below the detection level of the fluid indicator switch.

Without a warning, the driver may be unaware that the brake fluid level is low. A low brake fluid level may reduce the available braking force which could lengthen the required stopping distance and increase the risk of a crash.

BPI will notify customers and replace the fluid level indicator switch free of charge. The recall is expected to begin during June 2013.

Owners may contact BPI at 1-815-363-9000