Replace BMW Key Battery If your BMW key isn't able to open your car or turning on the engine, it may be time to replace your battery. It's a simple fix. Simply remove the key fob, replace the battery and gently place it back. Follow these steps to be back https://the-key-lab79417.elbloglibre.com/30056004/20-fun-infographics-about-bmw-3-series-key-fob