Replace BMW Key Battery It's probably time to replace your battery in the event that your BMW key won't open your car or turn off the engine. Fortunately, it's a simple fix. All you have to do is take off the key fob cover take it off, then replace the https://car-key-repair50935.blogcudinti.com/30142559/the-ultimate-guide-to-bmw-3-series-key-fob