How to Save Money on Audi Battery Replacement Is your Audi key fob not locking and unlocking it? This could indicate that the battery is in need of replacing. To replace the battery, open the key made of metal using an flathead and then open the back cover up using https://g28-car-keys05395.digitollblog.com/29915685/what-is-the-best-way-to-spot-the-audi-a4-spare-key-which-is-right-for-you