Brake Pads, Thickness, Checking

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WARNING:

Warning information for the high voltage system:

Procedures for which the ignition needs to be switched off. Refer to PROCEDURES FOR WHICH THE IGNITION NEEDS TO BE SWITCHED OFF .

WARNING:

If the pad thickness has reached the wear limit, replace the pads. Repair action: inform the customer.

Special tools and workshop equipment required

Test Pin T40139

Fig 1: Test Pin T40139
Courtesy of AUDI OF AMERICA, LLC

NOTE:

Use the side with the thin test mandrel (brake symbol) to measure the brake pad thickness.

It is required to remove the wheels for specific tire combinations.

Procedure:

-- Slide the sliding ring all the way in the direction of the measuring point.

-- Slide the test pin evenly in the direction of the brake pad until the test pin touches the brake pad backing plate.

-- Carefully remove the test pin and read the value on the scale.

NOTE:

Make sure the sliding ring does not move, otherwise the measurement will be incorrect.

Fig 2: Checking Front Pad Thickness

Courtesy of AUDI OF AMERICA, LLC

a - Pad thickness including backing plate and damping plate.

- Wear limit: -a- = 10 mm

Fig 3: Checking Rear Pad Thickness

Courtesy of AUDI OF AMERICA, LLC

a - Pad thickness including backing plate and damping plate.

- Wear limit: -a- = 10 mm