Replace BMW Key Battery It's probably the time to change your battery If your BMW key won't open your car or turn on the engine. Fortunately, it's a simple fix. All you have to do is remove the cover for the key fob, carefully remove and replace the battery, and https://thekeylab-co-uk49920.mybjjblog.com/the-history-of-bmw-key-fobs-in-10-milestones-43420761