Replace BMW Key Battery It's probably time to replace your battery in the event that your BMW key isn't able to open your car or turn the engine. It's simple to fix. Simply remove the key fob, replace the battery, and then gently put it back. Follow these steps and https://car-key-programming31388.myparisblog.com/30714887/are-bmw-key-fobs-really-as-vital-as-everyone-says