How to Save Money on Audi Battery Replacement Is your Audi key fob not locking and unlocking it? This may be a sign that the battery must be replaced. To replace the battery, you must open the key made of metal using an flathead and then open the back cover https://car-locksmith29116.prublogger.com/29518072/why-audi-a4-spare-key-is-relevant-2023