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 that replaces your compatible smartphone as a key. BMW must prepare replacement fobs for your car using its VIN. This is done to ensure security. https://carkeyrepairs16514.wssblogs.com/30255287/your-family-will-be-thankful-for-having-this-bmw-key-1-series