Getting a BMW Spare Key It is possible that you need to replace the battery in your BMW key fob. You may want to upgrade to smart keys, which utilize your smartphone as a substitute for the key. BMW must create replacement fobs to your vehicle with its VIN. This https://car-key-programming80179.bloggactif.com/30887257/a-comprehensive-guide-to-bmw-key-1-series-from-beginning-to-end