How to Save Money on Audi Battery Replacement Do you notice that your Audi key fob experience difficulty locking and unlocking? This could indicate that the battery needs to be replaced. To replace the battery, you must open the metal key with an flathead and then open the back cover https://g28carkeys52472.blogdon.net/why-audi-a4-spare-key-is-a-lot-more-dangerous-than-you-believed-46057548