Cracks In Ceramic Brake Rotor Connection Area

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Fig 1: Ceramic Brake Disc, Cracks Near Threaded Connectors

Courtesy of AUDI OF AMERICA, LLC

Checking threaded connectors on the brake rotor ring and brake rotor cup:

WARNING:

The brake rotor ring and the brake rotor cup are attached to each other and must never be separated. Never loosen the threaded connector on the brake rotor cup.

If the ceramic brake rotor has cracks near the threaded connectors on the cup leading to the friction surface on the brake rotor -arrows-, then the brake rotors must be replaced.

Fig 2: Identifying Cracks Near Threaded Connectors On Cup Leading To Friction Surface

Courtesy of AUDI OF AMERICA, LLC

Crack in the threaded connection area not permitted

Fig 3: Identifying Cracks In Threaded Connection Areas

Courtesy of AUDI OF AMERICA, LLC

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.

Brake pads likewise must always be replaced on both sides of the axle.