Replace BMW Key Battery If your BMW key isn't able to open your car or turning over the engine, it might be time to change your battery. Fortunately, it's a simple fix. It's as easy as removing the key fob, then replace the battery, and then gently put it back. https://carkeyreplacement00441.designi1.com/51901924/a-step-by-step-guide-for-choosing-your-bmw-key-fobs