Replace BMW Key Battery It could be time to change your battery in the event that your BMW key won't open your car or turn on the engine. It's a simple fix. It's as easy as removing the key fob, then replace the battery and gently put it back. Follow https://thekeylabcouk22599.targetblogs.com/30629369/buzzwords-de-buzzed-10-other-ways-to-say-bmw-3-series-key-fob