Getting a BMW Spare Key It is possible that you need to replace the battery in your BMW key fob. You might want to upgrade to smart keys, which utilize your smartphone as a substitute for keys. BMW will prepare replacement fobs for your vehicle using the VIN. This is https://wwwthekeylabcouk18555.blogdigy.com/the-myths-and-facts-behind-bmw-key-1-series-45125593