How to Save Money on Audi Battery Replacement Does your Audi key fob have trouble locking and unlocking? This could indicate that the battery must be replaced. To replace the battery, you must open the metal key with an flathead and then open the back cover up using a screwdriver. https://auto-locksmith81579.ezblogz.com/61709333/5-audi-a4-spare-key-projects-for-any-budget