How to Save Money on Audi Battery Replacement Is your Audi key fob having difficulty locking and unlocking it? This could be a sign that the battery needs to be replaced. To replace the battery, simply open the metal key using flathead, then pop the cover off using a screwdriver. https://g28-car-keys86803.designertoblog.com/61629981/10-tips-for-audi-a4-spare-key-that-are-unexpected