Brake Rotor Thickness, Checking For Wear

WARNING: This page is about a different car, the 2022 Audi SQ7, 2022 Audi S7, and 2022 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Commercially Available Digital Caliper or Micrometer Gauge.

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 -3-.

NOTE:

The engraving "min. weight " -4- is not on all brake rotors. Refer to BRAKE ROTOR THICKNESS, CHECKING, WITH ENGRAVED "min. weight"

-- 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

NOTE:

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

WARNING:

Risk of accident due to insufficient braking effect.

Ceramic brakes should be replaced when, one of the defined wear limits is reached. The brake rotor can no longer be driven.

If a brake rotor is damaged or worn, check the other brake rotors for damage and wear.