Getting a BMW Spare Key The BMW's key fob could need an upgrade in battery. You might want to upgrade to smart keys that use your smartphone as a substitute for a key. BMW must prepare replacement fobs to your vehicle using its VIN. This is done to ensure security. https://carkeyrepairs96692.laowaiblog.com/29362262/bmw-key-1-series-tips-from-the-most-effective-in-the-business