How to Save Money on Audi Battery Replacement Do you notice 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, open the metal key and use a flathead screwdriver to open the back cover. https://auto-locksmiths87066.eedblog.com/30241903/why-audi-a4-spare-key-is-relevant-2023