Replace BMW Key Battery If your BMW key isn't opening the doors of your car or turning on the engine, it may be time to replace your battery. It's a simple fix. You simply need to remove the key fob, then replace the battery and gently place it back. Follow https://thekeylab05326.bloggazzo.com/29609944/the-time-has-come-to-expand-your-bmw-key-fobs-options