See also:

Measurement
POWER STEERING FUEL SYSTEM TIRE BRAKE ...

Checking the Brake Fluid Level
WARNING: Use caution when handling brake fluid. It can damage your vision if it gets into your eyes. It will also damage your vehicle's paint if spilled on it and not removed immediately. ...

Brake discs, pads, calipers and rotors
Check the pads for excessive wear, discs for run out and wear, and calipers for fluid leakage. ...