Replace BMW Key Battery It's probably time to replace your battery in the event that your BMW key won't open your car or turn off the engine. Fortunately, it's an easy fix. It's as easy as removing the key fob, replace the battery and gently place it back. Follow these https://carkeyprogramming13829.ttblogs.com/9771252/5-bmw-key-fobs-lessons-from-the-professionals