Getting a BMW Spare Key The BMW's key fob might need an upgrade in battery. It is possible to upgrade to smart keys that use your smartphone as a substitute for keys. BMW must prepare replacement fobs for your car with its VIN. This is done to ensure security. This https://car-key-programming57254.webbuzzfeed.com/30741118/how-much-can-bmw-key-1-series-experts-earn