Getting a BMW Spare Key Your BMW's key fob may need an upgrade in battery. It is possible to upgrade to smart keys, which use your smartphone as a replacement for keys. BMW must create replacement fobs for your car with the VIN. This is done to ensure security. This https://www-thekeylab-co-uk99059.widblog.com/85136593/a-an-overview-of-bmw-key-1-series-from-start-to-finish