General Information
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2015 Audi S7, 2015 Audi RS 7, 2015 Audi A7 Quattro, 2014 Audi S7, and 2014 Audi RS 7. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
The brake rotor ring and the brake disc cup are attached to each other and must never be separated. Never loosen the threaded connector on the brake rotor cup.
Checking threaded connectors on the brake rotor ring and brake rotor cup:
Identification on the ceramic brake rotor on the brake rotor cup
- Running Direction
- Supplier
- On-Going Brake Rotor Production Number
- Audi Part NumberNOTE: The Audi part number on the brake rotor is an example and will be different on each vehicle model.
- Brake Rotor Date of Manufacture
- Minimum Permissible ThicknessNOTE: The minimum permissible brake rotor thickness is different for each vehicle model.
- New Ceramic Brake Rotor and Cup Weight
Checking threaded connectors on the brake rotor ring and brake rotor cup:
WARNING: The brake rotor ring and the brake disc cup are attached to each other and must never be separated. Never loosen the threaded connector on the brake rotor cup.NOTE: Depending on the version, the minimum weight of the brake rotor is stamped on the brake rotor cup. If the stamped-on minimum weight has been reached or falls short, replace the brake rotor. Always replace the brake rotors on both sides of the axle.CAUTION: If the minimum weight of the brake rotor "min. weight" is displayed on the brake rotor cup, then the brake rotor must be weighed to determine additional wear.CAUTION: Only brake rotors of the same version may be installed on an axle.
Clean the brake rotor before determining the wear.
WARNING:
Never clean the brake rotor with water or any other fluid. This will make the measuring result incorrect.
NOTE:
The brake rotor vent holes must be free of brake dust and dirt. It may be necessary to use something suitable to clean the holes. Do not use force.
Clean the brake rotor thoroughly with compressed air between the cooling channels and the vent holes.
CAUTION:
Always wear a mouth and nose mask when using compressed air to clean the brake rotor and the brake system.
Determining brake rotor wear:
- 1. Check the Brake Rotor Thickness
- 2. Check the Wear Indicators
- 3. Brake Rotor, Weighing
| 1. Refer to BRAKE ROTOR THICKNESS, CHECKING | |||
| 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 limit | ||
| ↓↓ | ↓↓ | ||
| Wear indicators | Brake Rotor, Replacing | ||
| ↓↓ | ---------- | ||
| 3. 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 | ||
| --------- | ↓↓ | ||
| ---------- | Brake Rotor, Replacing | ||
NOTE:
Depending on the version, the minimum weight of the brake rotor is stamped on the brake rotor cup. If the stamped-on minimum weight has been reached or falls short, replace the brake rotor. Always replace the brake rotors on both sides of the axle.
CAUTION:
If the minimum weight of the brake rotor "min. weight" is displayed on the brake rotor cup, then the brake rotor must be weighed to determine additional wear. If the minimum weight is reached or falls below, then the brake rotor must be replaced.
Brake rotor with stamped minimum weight.
| 1. Refer to BRAKE ROTOR THICKNESS, CHECKING, WITH STAMPED MINIMUM WEIGHT | |||
| 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 + 0.05 mm | when reaching or not reaching the limit | ||
| ↓↓ | ↓↓ | ||
| Wear indicators | Brake Rotor, Replacing | ||
| ↓↓ | ---------- | ||
| 3. 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 | ||
| --------- | ↓↓ | ||
| ---------- | Refer to BRAKE ROTOR, WEIGHING | ||
| ---------- | If the minimum weight is not reached | ||
| ---------- | ↓↓ | ||
| ---------- | The brake rotor is OK. | ||
| ---------- | If the minimum weight is reached | ||
| ---------- | ↓↓ | ||
| ---------- | Replace the brake rotor | ||
Always replace the brake rotors on both sides of the axle when:
- the brake rotors must be replaced because they are worn,
- the replacement brake rotor has been technically modified, which can be determined by the revised part number.
If one of the three defined wear limits is reached, then the brake rotor can no longer be used. Replace the brake rotor.
In this case, replace the brake rotors on each side of the axle.
Brake pads likewise must always be replaced on both sides of the axle.