Replace BMW Key Battery If your BMW key isn't opening your car or turning over the engine, it might be time to change your battery. Fortunately, it's a simple fix. You simply need to remove the key fob, replace the battery and gently put it back. Follow these steps and https://wwwthekeylabcouk46646.shoutmyblog.com/29641001/15-great-documentaries-about-bmw-key-fobs