How Do I Replace an Alternator on an Audi A4?

1. Disconnect the battery terminal with a wrench. Label the wires on the alternator for proper placement on the new alternator using masking tape and a marker. Disconnect the wires using a wrench to remove the nuts.
2. Loosen the adjusting bolt on the alternator using a socket and ratchet. Push the alternator toward the engine and pull the alternator belt off.
3. Remove the bolts from the alternator using a socket and ratchet. Pull the alternator off of the engine. You may have to work it back and forth to get it out of the car.
4. Put the new alternator in place and loosely install the bolts. Put the alternator belt on and then pull the alternator toward the front of the engine to tighten the belt. Tighten the adjusting bolt with the socket and ratchet once you have the belt drawn tight. Tighten the bottom bolt with the socket and ratchet.
5. Reconnect the wires according to the labeling and tighten the nuts with a wrench. Reconnect the negative battery terminal.