Replace BMW Key Battery It might be the time to change your battery if your BMW key isn't able to open your car or turn off the engine. Fortunately, it's a simple fix. All you have to do is remove the cover for the key fob then carefully remove and https://the-key-lab73275.blogoscience.com/36320296/the-reasons-to-focus-on-improving-bmw-3-series-key-fob