Brake Rotor Thickness
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.
-- Clean the brake rotor before determining the wear.
NOTE:
The brake rotor vent holes must be free of brake dust and dirt. It may be necessary to use a suitable tool to carefully clean the holes. Do not use any force when doing so.
WARNING:
Health Risk.
- Always wear a mouth and nose mask when using compressed air to clean the ceramic brake rotor.
-- Clean the brake rotors thoroughly with compressed air between the cooling channels and the vent holes.
-- To determine brake rotor wear:
- 1. Brake Rotor Thickness, Checking for Wear
- 2. Brake Rotor, Weighing
- 3. Wear Indicators, Checking
| 1. Check the brake rotor thickness. Refer to BRAKE ROTOR THICKNESS, CHECKING FOR WEAR . | |||
| If the brake rotor thickness is within the permissible range → then the brake rotor is OK | |||
| the thickness of the brake rotor is in the critical range: minimum th + 0.2 mm | When reaching or not reaching the threshold | ||
| ↓↓ | ↓↓ | ||
| Additional checking of the brake rotor by weighing | Replacing the brake rotor | ||
| ↓↓ | End | ||
| 2. Checking the brake rotor by weighing. Refer to BRAKE ROTOR, WEIGHING . | |||
| If the brake rotor weight is within the permissible range → then the brake rotor is OK | |||
| Brake rotor weight is in the critical range: minimum weight + 20 g | When reaching or not reaching the threshold | ||
| ↓↓ | ↓↓ | ||
| Further brake rotor evaluation at the wear indicators | Replacing the brake rotor | ||
| ↓↓ | End | ||
| 3. Use the wear indicators to check the brake rotor wear. Refer to WEAR INDICATORS, CHECKING . | |||
| If none of the six wear indicators are burned out → then the brake rotor is OK. | |||
| One of the six wear indicators is completely burned out | |||
| ↓↓ | |||
| Replacing the brake rotor | |||
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.