Replace BMW Key Battery It's probably the time to change your battery if your BMW key won't open your car or turn on the engine. It's an easy fix. All you have to do is remove the cover of the key fob then carefully remove and replace the battery, then https://car-key-repair41420.ssnblog.com/29532718/all-the-details-of-bmw-key-fobs-dos-and-don-ts