How to Save Money on Audi Battery Replacement Do you find that your Audi key fob have trouble locking and unlocking? This could indicate that the battery is in need of replacing. To replace the battery, you must open the metal key with flathead, then pop the back cover open https://car-locksmiths06369.full-design.com/what-is-audi-a4-spare-key-to-use-it-72477064