How to Replace 2002 Audi A4 Brake Rotors

1. Raise up the front of the vehicle using the jack and set it on the jack stands. Make sure that the vehicle is solidly on the stands before crawling underneath it. Take off the front wheels using the tire iron and set them out of the workspace.
2. Unbolt the front caliper bracket from the steering knuckle using the ratchet, then set the caliper and bracket onto a spare jack stand so the weight of the caliper is not supported by the brake line.
3. Spray the center of the rotor by the center dust cap with penetrating oil as well as the Phillips head screws that secure the rotor to the hub. Place the impact screwdriver onto the screw that retains the rotor to the hub and strike the back of the screwdriver with a hammer to loosen the screw. Remove the screw entirely.
4. Slide the rotor off of the steering knuckle by hand. If the rotor is still stuck on the knuckle, hit the rotor with the hammer to break up the rust that's holding it in place.
5. Clean the center of the hub with brake cleaner then apply anti-seize compound to the perimeter of the hub as well. Slide the replacement rotor onto the hub and loosely thread two wheel bolts onto the rotor to keep it in place. These rotors are side-specific so double-check that the part number on the rotor is correct for each side. The driver's side rotor has an odd-numbered part number; the passenger side is even numbered. Install the rotor retaining screw using the impact screwdriver.
6. Reinstall the brake caliper bracket using the 3/8-inch ratchet and socket, then reinstall the front wheels using a tire iron. Raise the vehicle off of the jack stands using the jack and place it back on the ground.