Brake pads, removing and installing
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
Special tools, testers and auxiliary items required
- Torque wrench V.A.G 1331
- Torque wrench V.A.G 1410
- Brake pedal actuator V.A.G 1869/2
- Piston resetting tool T10145
- Torque wrench V.A.G 1332
Removing
- Raise vehicle.
- Remove wheels.
NOTE:
- If reusing brake pads, mark location. Install in same position when installing otherwise uneven braking will occur!
- The brake disc is secured with a Torx bolt.
- Remove protective caps - arrows -.
- On vehicles equipped with a brake pad wear indicator disconnect connector - 1 -.
- Slightly lift up locating lug on lower part of connector - 2 - and turn 90°.
- Pull lower part of connector out of holder.
- Use a screwdriver to pry off brake pad retaining spring from brake caliper housing and remove.
- Unscrew and remove both guide pins from brake caliper.
- Remove brake caliper housing and lay to one side so that the weight of the brake caliper does not stress or damage the brake hose.
- Remove brake pads from brake caliper housing and/or brake carrier.
Installing
- Press piston back into caliper housing.
Use methylated spirits to clean brake caliper housing.
NOTE:
- Before inserting new brake pads, press the piston back into the cylinder using the piston resetting tool. Before pressing the piston back, draw off brake fluid from the reservoir with a bleeder bottle. Otherwise fluid will overflow and cause damage if the reservoir was topped off during repair work.
CAUTION:
Brake fluid is poisonous and must never be extracted by mouth using a hose!
- Insert brake pad with retaining spring into brake caliper housing (piston).
NOTE:
- The inner surface (with tension spring) is indicated by an arrow. The arrow must point in the rotation direction of the brake rotor when driving forward. If improperly installed, noises could result.
- Pull off protective foil on backing plate of outer brake pad.
- Install outer brake pad onto brake carrier.
- Secure brake caliper housing to brake carrier with both guide pins (tighten to 25 Nm).
- Install both protective caps.
- Insert retaining spring into brake caliper housing.
- Connect electrical connector for brake pad wear indicator.
Mount wheels → 44 - WHEELS, TIRES, VEHICLE ALIGNMENT .
NOTE:
- The retaining spring must be pressed under the brake carrier after inserting into both holes. If incorrectly installed, the wear of the outer pad cannot be adjusted, and the pedal travel will be increased as a result.
- After installing the brake pads, depress pedal firmly several times with the vehicle stationary, so that the brake pads are properly seated in their normal operating position.
- Check brake fluid level and top off if necessary.