Corresponding the BMW SB, TCU produced before 08/2004 doesnt have working bluetooth.

I fixed this by replace my unit to the one produced in 07/2005. Easy plug-n-play replacement, voice control etc. Mine cost about $100 (used, in Russia).
I talked with the one unofficial bmw service man, he told me that he can hack these early TCU, but I never check this - I have one worked.

I bought another one, produced in 2008 for my friend, it was european and has the sim-card slot on the side, some phone functionality worked, but in common it wasn't paired with my cellular, I mean this TCU was working as independent phone.

I'd like to note also that since 2008 was BMW information bus type replacement IBUS -> MOST (optical) so be carefull when buying fresh TCU - if them marked as MOST - but your car has IBUS it wont fit.

Attached Images

10888d1131675071-install-cell-phone-cradle-bluetooth-tsb-2.pdf (134.3 KB, 788 views)