How to Save Money on Audi Battery Replacement Is your Audi key fob having trouble locking and unlocking? This could be a sign the battery is in need of replacement. To replace the battery, simply open the metal key with flathead, then pop the back cover open using the screwdriver. https://g28-car-keys28517.jiliblog.com/87419444/5-must-know-audi-a4-spare-key-techniques-to-know-for-2023