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 that the battery needs to be replaced. To replace the battery, you must open the metal key with flathead, then pop the back cover https://g2874607.suomiblog.com/how-audi-a4-spare-key-has-changed-my-life-the-better-45475314