Replace BMW Key Battery If your BMW key isn't opening the doors of your car or turning on the engine, it might be time to replace your battery. It's a simple fix. All you need to do is remove the cover of the key fob then carefully remove and replace https://carkeyrepair67079.verybigblog.com/29588513/how-to-recognize-the-bmw-key-fobs-which-is-right-for-you