How to Upgrade Your BMW Key 1 Series If your BMW keyfob doesn't function well, you might need an upgrade to the battery. Also referred to coin batteries, these are easily obtainable and replaceable in a few simple steps. Each key is connected to a driver profile and every key https://autolocksmiths59211.ampedpages.com/15-great-documentaries-about-bmw-battery-replacement-key-57943378