How to Replace a Dead BMW Key Fob The majority of BMW owners will require changing their key fob batteries at some point. It's easy to do and won't cost you a lot. The key fob is powered by a standard CR2032 and can be replaced at the local BMW https://g2858108.is-blog.com/37079974/what-freud-can-teach-us-about-bmw-car-key-replacement