Replace BMW Key Battery It's probably time to replace your battery If your BMW key isn't able to open your car or turn the engine. It's a simple fix. All you need to do is remove the key fob cover then carefully remove and replace the battery, and insert it https://thekeylab84344.howeweb.com/30687397/15-interesting-facts-about-bmw-key-fobs-you-ve-never-known