How to Save Money on Audi Battery Replacement Do you notice that your Audi key fob have trouble locking and unlocking? This could be a sign the battery is in need of replacing. To replace the battery, simply open the metal key with a flathead and pop the back cover https://g28-car-keys75273.blogmazing.com/29571645/10-audi-a4-spare-key-tricks-all-pros-recommend