How to Save Money on Audi Battery Replacement Does your Audi key fob have issues locking and unlocking? This may be a sign that the battery must be replaced. To replace the battery, turn off the key made of metal and use a flathead screwdriver to open the back cover. https://g28carkeys91849.blogvivi.com/30617959/7-effective-tips-to-make-the-most-out-of-your-audi-a4-spare-key