Getting a BMW Spare Key You may require replacing the battery in your BMW key fob. You might want to upgrade to smart keys, which use your smartphone as a replacement for keys. BMW must prepare replacement fobs to your vehicle with its VIN. This is done to ensure security. https://thekeylabcouk22599.targetblogs.com/30678977/how-to-determine-if-you-re-set-to-go-after-bmw-key-1-series