How to Save Money on Audi Battery Replacement Does your Audi key fob have issues locking and unlocking? This could indicate that the battery is in need of replacement. To replace the battery, open the key made of metal using a flathead and pop the cover off with the screwdriver. https://autolocksmith84096.frewwebs.com/30385090/say-yes-to-these-5-audi-a4-spare-key-tips