Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Visual Characteristics Of Ceramic Brake Rotors
Identifications on the Ceramic Brake Rotor on the Brake Rotor Cup
- Running Direction
- Brake Rotor Production Date
- Example
- Brake Rotor Minimum Thickness
- Example
- Wear limit. Refer to BRAKE ROTOR, WEIGHING - The minimum permitted brake rotor weight "min.weight" is engraved in the brake rotor cup -4-. .
- Minimum Weight of Brake Rotor and Cup
- Example
- Supplier
- Example
- Brake Rotor Serial Production Number
- Example
- Audi Part Number
- Example
Overview - Brake Rotor
- Cooling Duct
- Friction Surface
- Base Material
The friction surface on a new brake rotor already has stress cracks which occur during the production process. These stress cracks are all different.
- Stress cracks do not mean the ceramic brake rotor is faulty.
- The stress cracks are somewhat visible and can be different from each other in strength.
-- Check the connection area on the brake rotor ring and brake rotor cup. Refer to CRACKS IN CERAMIC BRAKE ROTOR CONNECTION AREA .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.