Audi A4 Brake Performance and Racing PDF Installation Instructions Manual

PREPARATION FOR INSTALLATION
1. Be sure that the vehicle is parked on level concrete and the parking brake is on.
2. Place stops in front of and behind rear tires.
3. Consult owner’s manual for proper lifting and wheel removal procedures before lifting front of vehicle.
4. Place jack stands under vehicle for added stability.
5. Remove wheel.

6.Place a brake line clamp on the brake line. Thiswill minimize brake fluid loss.
7.Using an 11mm wrench, disconnect brake line from caliper. Be aware that brake fluid may leak from line once disconnected.
8. Disconnect ABS sensor grommet from mounting bracket by pulling straight up.
9. Disconnect brake pad sensor from mounting bracket. Pry tab up gently with small flat head screwdriver, rotate counterclockwise 90 degrees, and lift up.

10.Clip the section of wire between the brake pad and the plug. Be sure to leave sufficient wire length coming from the plug in order to crimp the wires together. Strip 1/8” of the insulation on the wires and connect them together using a wire crimp as illustrated in picture bellow. It is recommended to protect the connection by applying shrink-wrap around the wire crimp.
11.Place the pad sensor plug in the small opening on the upright.
12.With a zip tie included in the kit, secure the plugs placement by zip tying it tightly to the ABS wire that is also running through the upright.
13.Using a deep well socket, remove the 17mm bolts on the back side of the caliper and remove caliper.
14.Remove the rotor. If the rotor seems to be stuck in place, lightly tap rotor with a rubber mallet.
15.Remove the backing plate. It is held on by three 10mm bolts.
16.Install the APR caliper mounting bracket with the flat side facing the outside of the vehicle and tighten with a 17mm deep well socket.

17.Install the APR rotor for the corresponding side (see picture below) and test for clearance on the backside at the bottom. When checking for clearance, be sure to secure and firmly seat the rotor with a bolt. Occasionally there is flash material from the casting in the area circled in the picture to the left. If it is necessary to remove material, a hand file will be sufficient. Note: There is a left and right side rotor. In order to achieve maximum performance it is recommended that the rotors be installed with the outside end of slots pointed in the wheels direction of rotation.
18.Remove the two 5mm hex head bolts on the inboard side of the APR caliper. These are securing the brake pad retaining bracket.
19.Remove the brake pad retaining bracket. Be sure to note orientation for reinstallation.
20.Install the APR caliper marked for the corresponding side. Be sure the APR logo is facing towards the outside of the vehicle and the bleeder valves are oriented upwards. Note: There is a left and right side caliper and they CANNOT be interchanged.

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