How to Save Money on Audi Battery Replacement Do you find that your Audi key fob experience difficulty locking and unlocking? This could indicate that the battery needs to be replaced. To replace the battery, simply open the metal key using flathead, then pop the cover off with the screwdriver. https://g28carkeys11756.iyublog.com/29501558/the-full-guide-to-audi-a4-spare-key