Getting a BMW Spare Key The BMW's key fob might require new batteries. You may want to upgrade to smart keys, which use your smartphone as a substitute for the key. BMW must prepare replacement fobs to your vehicle by using the VIN. This is done to protect your vehicle. https://carkeyreplacement31461.win-blog.com/10140695/why-is-bmw-key-1-series-so-effective-during-covid-19