Replace BMW Key Battery It could be the time to change your battery If your BMW key isn't able to open your car or turn the engine. Fortunately, it's an easy fix. It's as easy as removing the key fob, replace the battery, and then gently put it back. Follow https://car-key-repair41420.ssnblog.com/29532718/all-the-details-of-bmw-key-fobs-dos-and-don-ts