How to Replace a Dead BMW Key Fob Almost every BMW owner will have to replace their key fob's battery at some point in time. It's simple to do and will not cost you a lot. The key fob is powered by an ordinary CR2032 and can be easily replaced https://g28-car-keys75273.blogmazing.com/30122784/15-gifts-for-that-bmw-car-key-replacement-lover-in-your-life