How to Save Money on Audi Battery Replacement Does your Audi key fob experience difficulty locking and unlocking? This could be a sign the battery is in need of replacement. To replace the battery, you must open the metal key with flathead, then pop the cover off using a screwdriver. https://g28-car-keys51697.review-blogger.com/52207459/it-s-the-complete-list-of-audi-a4-spare-key-dos-and-don-ts