How to Save Money on Audi Battery Replacement Is your Audi key fob not locking and unlocking? This could be a sign that the battery is in need of replacement. To replace the battery, you must open the metal key with an flathead and then open the back cover up https://autolocksmith96720.blogdosaga.com/29780568/how-to-recognize-the-audi-a4-spare-key-that-s-right-for-you