How to Save Money on Audi Battery Replacement Does your Audi key fob have trouble locking and unlocking? This could be a sign that the battery is in need of replacement. To replace the battery, flip open the metal key and use a flathead screwdriver to remove the back cover. https://carlocksmiths13630.link4blogs.com/51865073/15-startling-facts-about-audi-a4-spare-key-you-ve-never-known