I have an apointment to bring in my X in the morning to my local dealer to have this done. My build date was also 8/04 which my dealer told me was 1 month before they started to include the 05 assist/bt combo unit.

I'm glad I stumbled across this thread because I was wondering why I had that passcode card in my glove w/o bt.

I should be able to provide the part number after tomorrow and I'm told that this new release of this part this month saves me almost $1,000 so rather than being $1,600 it should be in the $600 range.

Crossing my fingers and hoping the part they described and ordered is the part I want.