Brake Rotor, Weighing

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 Scale with a Measuring Exactness of up to ±1 gram.

Does not apply when using the Carbon-Ceramic Brake Wear Tester: VAS6813 to determine wear.

Procedure

Fig 1: Identifying Brake Rotor "Min. Weight" Data

Courtesy of AUDI OF AMERICA, LLC

The minimum permitted brake rotor weight "min.weight" is engraved in the brake rotor cup -4-.

-- Remove the brake rotor to weigh it. Refer to BRAKE ROTOR, REMOVING AND INSTALLING, CERAMIC BRAKES or BRAKE ROTOR, REMOVING AND INSTALLING, CERAMIC BRAKES .

Clean and dry the brake rotor before weighing it.

WARNING:

Health Risk.

Always wear a mouth and nose mask when using compressed air to clean the ceramic brake rotor.

CAUTION:

Risk of false results.

Never clean the brake rotor with water or any other fluid.

NOTE:

The brake rotor vent holes must be free of dirt. It may be necessary to use a suitable tool to carefully clean the holes.

Clean the brake rotors thoroughly with compressed air between the cooling channels and the vent holes.

-- Carefully lay the clean brake rotor on the scale.

NOTE:

If the threshold plus 20 grams is reached, then determine the brake wear by checking the wear indicators. 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.