Checking the degree of wear of the brake pads and discs Audi A4

Tools:

Calipers
Flashlight

Parts and consumables:

Brake discs

1 . To check the thickness of the brake disc, mark the direction of rotation of the wheel with an arrow. Loosen the wheel bolts. Raise and place the car on stands.

2 . Be sure to measure the thickness of the brake disc at the thinnest point (arrow in the accompanying illustration). For this purpose, a service station has a special caliper or micrometer bracket, because. disc wear has an edge. You can measure the thickness of the disk using a conventional caliper. In this case, a spacer of a certain thickness (eg a small coin) must be placed on each side of the brake disc. In this case, the thickness of two coins must be subtracted from the measurement result obtained.

Caliper for measuring wheel thickness Audi A4

Calipers.

Checking the degree of wear of the brake pads and discs Audi A4

Note:

It is necessary to measure at several points on the brake disc.

3 . If the disc wear limit is reached, it is necessary to replace both discs of the same axle.

4 . If there are large cracks or grooves with a depth of more than 0.5 mm, the brake disc must be replaced.

5 . Respect the direction of rotation, install the wheel and secure it. Lower the car onto the wheels and only then tighten the wheel bolts crosswise to a torque of 120Nm.

Checking the thickness of the brake pads on the front wheels of the Audi A4

Checking the thickness of the front brake pads.

Checking the thickness of the rear brake pads Audi A4

Checking the thickness of the rear brake pads.

Note:

The thickness of the outer brake pads can be checked through the opening in the wheel rim using a flashlight. The inner shoe can be checked with a flashlight and a mirror. If you need to more accurately estimate the thickness of the pad, you should remove the wheel and measure the pad with a caliper.

Experience shows that wheel brake pad wear on the front passenger side is greater than on the driver's side. Therefore, to check the thickness of the brake pad, it is recommended to remove the wheel from the front passenger side.

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