Getting a BMW Spare Key Your BMW's key fob may 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 the VIN. This is done to ensure security. https://www-thekeylab-co-uk93066.blogs-service.com/61038148/bmw-key-1-series-101-your-ultimate-guide-for-beginners