Brake Rotor Thickness, Checking

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

At a distance of 120° the marks for the measurement for deterring the wear can be found

Measure the brake rotor thickness at these three locations

This example shows the third measuring point:

Fig 1: Wear Indicator A Through D

Courtesy of AUDI

The minimum permissible brake rotor thickness "min.th." is engraved in the brake rotor cup.

-- Measure the brake rotor thickness -x- three times around the circumference at the measuring locations.

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

Courtesy of AUDI

If the brake rotor thickness "min.th." falls short at one measuring point, the brake rotor must be replaced.

Example of minimum thickness: -3-, brake rotor thickness. It must not fall short of this value.

Fig 3: Identifying Ceramic Brake Rotor Data

Courtesy of AUDI

TIP:

Depending on the brake rotor, the value -3- may be different.

If there is abrasion both brake rotors on both sides of the axle must always be replaced.

If the brake rotor thickness does "not" fall short continue. Refer to DETERMINING WEAR USING Carbon-Ceramic Brake Wear Tester .