How to Save Money on Audi Battery Replacement Do you notice that your Audi key fob have issues locking and unlocking? This may be a sign that the battery must be replaced. To replace the battery, simply open the metal key using an flathead and then open the back cover https://g2847115.kylieblog.com/30310951/is-audi-a4-spare-key-as-crucial-as-everyone-says