Replace BMW Key Battery If your BMW key isn't able to open your vehicle or turning the engine, it may be time to change your battery. It's a simple fix. Simply remove the key fob, replace the battery and gently place it back. Follow these steps and you'll be back https://car-key-replacement02870.blogofchange.com/30686279/speak-yes-to-these-5-bmw-key-fobs-tips