Replace BMW Key Battery If your BMW key isn't opening your vehicle or turning the engine, it might be time to replace your battery. It's an easy fix. All you need to do is take off the key fob cover take it off, then replace the battery, and insert it https://the-key-lab81535.blog-ezine.com/30315434/it-s-time-to-extend-your-bmw-key-fobs-options