Replace BMW Key Battery If your BMW key isn't able to open your car or turning over the engine, it could be the time to replace your battery. Fortunately, it's a simple fix. Simply remove the key fob, then replace the battery, and then gently put it back. Follow these https://the-key-lab80178.p2blogs.com/29525134/15-surprising-stats-about-bmw-3-series-key-fob