I've had the little resistor from somewhere in eastern Europe sitting in my parts pile for many weeks. Its supposed to emulate a butt in the pax seat, I'm guessing, which will allow the airbag to fire regardless of what size, or if any butt is in the seat.
I was in my storage space yesterday and grabbled the pigtail from the OE seats that I replaced with the facelifted comfort seats. Even though these facelifted seats are much nicer and have a lot more functionality than my OE seats, everything worked when I plugged them into my X5. So I reasoned that the car simply wasn't seeing what it needed to see from the occupancy sensor. Maybe it was code, wiring, a bad pad, or it needed the little box under the seat (that the facelifted occupancy system doesn't have), but whatever the reason I was getting the code and airbag guy in the cluster, my best bet was to put the OE seat wiring back under the new seat, along with the little box with the emulator plugged into it.
The occupancy sensor box has the emulator plugged into one side, and the cable to the bit yellow plug fits right into its designated spot once you pull the protective cover off the back of the plug, and pull the harness that came with the seats, out. I think they are identical harnesses in operation, although since the wire colors were different I figured I'd use the one that was on the seats I took out.
I removed the plug assembly from the bracket, unplugged it, and then took the protective cover off the back, which covers all the individual plugs and wires coming from the seat systems. After that it was easy to swap the OE wire with the one that came with the "new" seat. I plugged in the little box, put it all back together, cleared the codes with my foxwell and so far, so good. No little airbag guy, and no SRS codes. Time will tell though. As I recall, it took a while for the light and code to pop after resetting it when I was troubleshooting. I cleaned it all up and snapped it into the plastic holder that is present the "new" seats, even though they don't have this little box.