How to Save Money on Audi Battery Replacement Do you notice that your Audi key fob experience difficulty locking and unlocking? This may be a sign that the battery must be replaced. To replace the battery, open the metal key and use a flathead screwdriver to remove the back cover. https://auto-locksmiths02894.wssblogs.com/30207875/10-audi-a4-spare-key-hacks-all-experts-recommend