Replace BMW Key Battery It might be time to replace your battery If your BMW key won't open your car or turn on the engine. Fortunately, it's a simple fix. You simply need to remove the key fob, replace the battery and gently put it back. Follow these steps and https://thekeylab-co-uk62880.bloggip.com/30196862/14-questions-you-might-be-afraid-to-ask-about-bmw-3-series-key-fob