Replace BMW Key Battery It's probably time to replace your battery If your BMW key isn't able to open your car or turn on the engine. It's a simple fix. Simply remove the key fob, then replace the battery, and then gently put it back. Follow these steps to get https://car-key-replacements51447.blogvivi.com/30782438/15-reasons-you-shouldn-t-ignore-bmw-3-series-key-fob