How to Upgrade Your BMW Key 1 Series If your BMW keyfob doesn't function well, you might require a new battery. They're also known as coin batteries and can be replaced with only a few simple steps. Each key is connected to a driver profile and each key is able https://g28-car-key-solutions22786.bloggosite.com/37333243/a-step-by-step-guide-for-choosing-your-bmw-battery-replacement-key