Brake Rotor Thickness, Checking For Wear

Special tools and workshop equipment required

Procedure

Fig 1: Identifying Ceramic Brake Rotor Data

Courtesy of AUDI OF AMERICA, LLC

The minimum permitted brake rotor thickness "min.th." is engraved in the brake rotor cup -item 3-.

-- Measure the brake rotor thickness -x- three times around the circumference in addition to the individual wear indicators.

Fig 2: Measure Brake Disc Thickness Three Times On Each Wear Indicator Circumference Of Brake Disc

Courtesy of AUDI OF AMERICA, LLC

If dimension -x- = minimum thickness +0.2 mm is reached, also check the wear indicators to determine the brake rotor wear.

CAUTION:

Risk of accident due to insufficient braking action on worn ceramic brake rotors.

Reusing ceramic brake rotors that have reached the wear limit is not permitted.

- Immediately replace the ceramic brake rotors once they have reached one of the wear limits defined below.

CAUTION:

Risk of accident due to uneven braking.

- Always replace brake rotors on both sides of the axle.

- Also replace the brake pads on both sides of the axle.