Replace BMW Key Battery It's probably time to replace your battery if your BMW key won't open your car or turn on the engine. Fortunately, it's an easy fix. All you have to do is remove the key fob cover then carefully remove and replace the battery, and then put https://car-key-replacements51447.blogvivi.com/30618558/bmw-key-fobs-tips-from-the-top-in-the-business