Brake Master Cylinder - Non-Pressure External Leaks

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

A low brake fluid level in the brake master cylinder reservoir may be caused by the following non-pressure external leaks:

Type 1: An external leak may exist at the brake master cylinder filler cap due to incorrect position of the cap, cap gasket, or cap gasket deterioration. Repair or install new components as necessary.

Type 2: An external leak may exist at the brake master cylinder mounting flange due to internal seal failure. Repair or install a new brake master cylinder. For additional information, refer to HYDRAULIC BRAKE ACTUATION .

Type 3: An external leak may exist at the base of the brake master cylinder reservoir due to deteriorated reservoir mounting seals. Repair or install a new brake master cylinder. For additional information, refer to HYDRAULIC BRAKE ACTUATION .