Replace BMW Key Battery It could be time to change your battery If your BMW key isn't able to open your car or turn off the engine. It's a simple fix. All you have to do is remove the cover for the key fob, carefully remove and replace the battery, https://thekeylabcouk82158.bloggazza.com/29525146/bmw-key-fobs-tools-to-ease-your-daily-life-bmw-key-fobs-trick-every-person-should-learn