Replace BMW Key Battery It's probably time to change your battery if your BMW key won't open your car or turn off the engine. It's simple to fix. You simply need to remove the key fob, replace the battery, and then gently put it back. Follow these steps and you'll https://www-thekeylab-co-uk10139.jaiblogs.com/57079991/it-is-the-history-of-bmw-key-fobs-in-10-milestones