How to Upgrade Your BMW Key 1 Series If your BMW keyfob isn't functioning properly, you may just require a new battery. Also known as a coin battery, these can be easily replaced in a few simple steps. Each key is linked to a profile of the driver and each https://g28-car-key-solutions85680.blogs100.com/31182171/how-bmw-battery-replacement-key-influenced-my-life-for-the-better