How to Save Money on Audi Battery Replacement Are you experiencing issues with your Audi key fob not locking and unlocking? This could be a sign that the battery is in need of replacing. To replace the battery, open the metal key with flathead, then pop the back cover open https://carlocksmith82946.blogdigy.com/there-s-a-good-and-bad-about-audi-a4-spare-key-45064076