Getting a BMW Spare Key The BMW's key fob could need an upgrade in battery. Perhaps you'd like to upgrade to a smart key that replaces your smartphone with a compatible key. BMW will prepare replacement fobs to your vehicle with the VIN. This is done to protect your vehicle. https://carkeyreplacement09721.bligblogging.com/30765577/how-to-tell-if-you-re-ready-to-go-after-bmw-key-1-series