How to Change the Brake Pads on an Audi A4

1. Lift the Audi A4 with the jack and place it on jack stands.
2. Remove the wheels with a lug-nut wrench and set them aside. The lug-nut wrench can be found in the trunk of your A4. If you cannot find it, you can also use a ratchet and 21-mm socket.
3. Remove the caliper with a ratchet and use a bungee cord to hang the caliper. Do not let the caliper hang from the brake hose as it might break and cause fluid to leak.
4. Remove the brake caliper bracket from the steering knuckle with a ratchet and set it aside.
5. Remove the brake rotor from the hub. The rotor might require force to remove; if it does, use a hammer to hit the rotor in the center where the lug studs are located. Take care not to hit the studs.
6. Remove the new rotor from its packaging, and use brake cleaner to remove the grease from the rotor. Grease is put on the rotor in the factory to inhibit rust during storage.
7. Install the new rotor onto the hub.
8. Install the caliper bracket with new brake pads installed onto the rotor, and fasten to the steering knuckle. Use a ratchet to tighten the bolts.
9. Open the master cylinder reservoir so you don't break a seal while compressing the brake caliper.
10. Compress the brake caliper with a C-clamp so the caliper can fit over the new brake pads. Install the caliper by securing it to the brake caliper bracket with a ratchet.