Getting a BMW Spare Key The BMW's key fob might need new batteries. It is possible to upgrade to smart keys that use your smartphone as a substitute for the key. BMW must prepare replacement fobs for your vehicle by using its VIN. This is done to protect your vehicle. https://carkeyreplacement64138.isblog.net/15-startling-facts-about-bmw-key-1-series-that-you-d-never-been-educated-about-47340613