How to Save Money on Audi Battery Replacement Is your Audi key fob having trouble locking and unlocking? This could be a sign the battery is in need of replacing. To replace the battery, open the metal key and use a screwdriver with a flat head to open the back https://autolocksmiths59211.ampedpages.com/it-s-the-complete-list-of-audi-a4-spare-key-dos-and-don-ts-57138779