How to Upgrade Your BMW Key 1 Series If your BMW keyfob isn't functioning correctly, you might need an upgrade to the battery. They are also referred to as coin batteries and can be replaced with a few easy steps. Each fob is linked to a driver profile, and every https://carlocksmith78502.sharebyblog.com/30610985/why-bmw-battery-replacement-key-is-the-next-big-obsession