My E46 was imported from Japan and came with the infamous 2-button Infrared (IR) remote control system. The range of the IR signal is extremely limited and also requires a direct line of sight to the car. After reading through some forum threads combined with some of my own findings it seemed fairly easy to convert from IR to RF. This is a guide to inform you of the basic steps. I’d like to thank Colin from http://bmwgm5.info for giving me some suggestions and helping me along the way to make th