Getting a BMW Spare Key The BMW's key fob could require an upgrade in battery. You might want to upgrade to smart keys, which utilize your smartphone as a substitute for keys. BMW must create replacement fobs for your vehicle by using the VIN. This is done to ensure security. https://carkeyreplacements44437.blogdosaga.com/30079683/how-can-a-weekly-bmw-key-1-series-project-can-change-your-life