Replace BMW Key Battery If your BMW key isn't able to open your car or turning over the engine, it may be time to replace your battery. Fortunately, it's a simple fix. You simply need to remove the key fob, then replace the battery and gently place it back. Follow https://thekeylab33350.bloggadores.com/29611912/7-things-you-ve-never-learned-about-bmw-key-fobs