How to Save Money on Audi Battery Replacement Is your Audi key fob not locking and unlocking it? This could be a sign that the battery is in need of replacement. To replace the battery, open the metal key using a flathead and pop the cover off with the screwdriver. https://car-locksmiths55654.win-blog.com/9885486/what-audi-a4-spare-key-experts-would-like-you-to-be-educated