Getting a BMW Spare Key The BMW's key fob could require an upgrade in battery. Or perhaps you want to upgrade to a smart key, which replaces your compatible smartphone as a key. BMW must create replacement fobs to your vehicle with its VIN. This is done to ensure security. https://the-key-lab46531.blog2news.com/30617783/a-step-by-step-guide-to-bmw-key-1-series-from-beginning-to-end