Brake Pads, Checking Thickness

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WARNING:

Warning information for the high voltage system:

For procedures where the ignition must be switched off, refer to PROCEDURES FOR WHICH THE IGNITION NEEDS TO BE SWITCHED OFF .

Special tools and workshop equipment required

Test Pin :T40139

Courtesy of AUDI OF AMERICA, LLC

To determine brake pad thickness, the sliding ring must be slid as far as stop in the direction of the measure point, then bring measuring point of test pin through rim and into contact with brake pad and slide test pin evenly in direction of brake pad until the test pin touches the brake pad backing plate.

Then remove test pin and read the value on the scale identified by the brake symbol.

NOTE:

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

The second scale on the test pin (tire symbol) can be used to determine the tire tread depth.

Courtesy of AUDI OF AMERICA, LLC

a - Pad thickness including backing plate and insulation mat (depending on equipment).l

- Wear limit: 9

Courtesy of AUDI OF AMERICA, LLC

a - Pad thickness including backing plate and insulation mat (depending on equipment).l

- Wear limit: 8

WARNING:

When the brake pads reach a thickness of 9 on the front axle and 8 on the rear axle (value on test pin scale), they must be replaced. Inform the customer.

NOTE:

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

Determine thickness of outer pads by checking visually (using a flashlight through a hole in wheel).

Determine thickness of the inner pad by visual check (using a flashlight through a hole in the wheel).