Question

If the master cylinder fluid level is low, either there’s a leak or the car has

A. worn brake pads.
B. a wheel bearing out of adjustment.
C. misadjusted rear drum brakes
D. a misadjusted parking brake.

Answer 1

A. Worn Brake Pads. As the pads wear down the piston/pistons in the caliper extend, allowing more fluid from the master cylinder to enter the calipers.