Replace BMW Key Battery If your BMW key isn't opening the doors of your car or turning over the engine, it might be time to change your battery. It's simple to fix. It's as easy as removing the key fob, replace the battery and gently place it back. Follow these https://carkeyrepair87330.blogzet.com/10-reasons-why-people-hate-bmw-3-series-key-fob-44971439