How to Upgrade Your BMW Key 1 Series If your BMW key fob isn't functioning correctly, it most likely requires a new battery. Also known as coin batteries, these can be easily replaced in just a few easy steps. Each key is linked to a driver profile and each key https://g28carkeys54558.ageeksblog.com/30016068/what-will-bmw-car-key-replacement-be-like-in-100-years