Replace BMW Key Battery If your BMW key isn't able to open your car or turning over the engine, it could be time to change your battery. It's a simple fix. Simply remove the key fob, replace the battery and gently put it back. Follow these steps and you'll be https://car-key-programming59157.prublogger.com/29610951/what-freud-can-teach-us-about-bmw-3-series-key-fob