Getting a BMW Spare Key The BMW's key fob might need an upgrade in battery. Perhaps you'd like to upgrade to a smart key, which replaces your smartphone with a compatible key. BMW must prepare replacement fobs for your car using its VIN. This is done to protect your vehicle. https://www-thekeylab-co-uk95437.blogminds.com/bmw-key-1-series-tips-from-the-top-in-the-industry-27721586