220.127.116.11.652 Aux-in/usb port
18.104.22.1680.696 universal socket (connector) housing (4 place)
61.13.0.006.663 wiring contacts with wire pigtails (need 3)
22.214.171.124.252 single position switch cover (blank). BMW makes 1, 3, 4 place covers, no 2 place covers for some reason.
All USB power source components were sourced from the Shack (aka Radio Shack). I wired the usb power supply to the cigar lighter...always on. I would recommend that any device be disconnect from the USB power socket whenever the car is started or switched off to avoid dirty power spikes from potentially damaging any connected device.
If anyone has a part number for the BMW usb connector, please let me know....