Replace BMW Key Battery It's probably time to change your battery if your BMW key won't allow you to open your car or turn on the engine. It's a simple fix. All you have to do is remove the cover for the key fob then carefully remove and replace the https://www-thekeylab-co-uk95437.blogminds.com/how-to-find-the-perfect-bmw-key-fobs-online-27772752