How to Save Money on Audi Battery Replacement Is your Audi key fob having trouble locking and unlocking? This could indicate that the battery needs to be replaced. To replace the battery, flip open the metal key and use a screwdriver with a flat head to remove the back cover. https://car-locksmith17735.xzblogs.com/71317577/how-audi-a4-spare-key-has-changed-my-life-the-better