Getting a BMW Spare Key You might require a replacement battery in your BMW key fob. Perhaps you'd like to upgrade to a smart key, which replaces your smartphone with a compatible key. BMW will prepare replacement fobs to your vehicle with the VIN. This is done to ensure security. https://thekeylab42633.blogzag.com/74307954/what-are-the-myths-and-facts-behind-bmw-key-1-series