Wear Indicators, Checking

The Wear Indicators On The Brake Rotor Friction Surface Are Positioned 120 Degrees From Each Other.

The wear indicators -arrow- can be recognized by their different color.

Fig 1: Identifying Wear Indicator By Difference In Color To Rotor Surface Metal
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On the front and back side of the brake rotor are three wear indicators.

Wear Indicator OK

Fig 2: Identifying OK Wear Indicator

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Burned-Out Wear Indicator, Example 1

Fig 3: Identifying Burned Out Wear Indicator

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With increasing wear on the brake rotor, a dark burned-out recess develops on the wear indicators.
Even if only one of the six indicators is completely burned out, the ceramic brake rotor must be replaced.

Burned-Out Wear Indicator, Example 2

Fig 4: Identifying Burned Out Wear Indicator

Courtesy of AUDI OF AMERICA, LLC

With increasing wear on the brake rotor, a dark burned-out recess develops on the wear indicators.
Even if only one of the six indicators is completely burned out, the ceramic brake rotor must be replaced.

CAUTION:

Risk of accident due to insufficient braking action on worn ceramic brake rotors.

Reusing ceramic brake rotors that have reached the wear limit is not permitted.

- Immediately replace the ceramic brake rotors once they have reached one of the wear limits defined below.

CAUTION:

- Always replace brake rotors on both sides of the axle.

- Also replace the brake pads on both sides of the axle.