Replace BMW Key Battery If your BMW key isn't opening the doors of your car or turning on the engine, it might be the time to replace your battery. It's a simple fix. Simply remove the key fob, then replace the battery and gently place it back. Follow these steps https://car-key-replacement36614.blogchaat.com/30150663/why-bmw-key-fobs-is-your-next-big-obsession