How to Upgrade Your BMW Key 1 Series If your BMW keyfob isn't working correctly, you might require an upgrade to the battery. Also referred to a coin battery, these can be easily replaced in a few simple steps. Each key is linked to a driver profile, and every key https://autolocksmiths59211.ampedpages.com/15-great-documentaries-about-bmw-battery-replacement-key-57943378