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 replacing. To replace the battery, simply open the key made of metal using a flathead and pop the back cover open https://carlocksmith56198.blogpostie.com/51989642/audi-a4-spare-key-tips-that-will-change-your-life