How to Save Money on Audi Battery Replacement Is your Audi key fob having trouble locking and unlocking? This may be a sign that the battery needs to be replaced. To replace the battery, open the key made of metal and use a flathead screwdriver to open the back cover. https://auto-locksmiths07547.jaiblogs.com/57014946/five-audi-a4-spare-key-projects-for-any-budget