Replace BMW Key Battery It's probably time to change your battery if your BMW key isn't able to open your car or turn off the engine. Fortunately, it's an easy fix. All you need to do is take off the cover of the key fob take it off, then replace https://carkeyreplacement15401.blogtov.com/10520902/bmw-key-fobs-tips-that-will-change-your-life