You don't have a ULF. You have a TCU. I looked up the number you posted. I am in the same boat because I have a 04 X5 with a Bluetooth TCU but no functionality. Your options depend on the build date of your vehicle.

Mine is a 09/03 and cannot have an updated Assist module. I believe is is the 10/03 and beyond where you can get an updated Assist unit with bluetooth and assist included and it will function. Some on this forum have not needed recoding where others did not.
My only option is to use a ULF. Once I install the ULF, I will lose the Assist functionality. It is really a shame that BMW sold a vehicle with this feature and never attempted to make the owners who thought they paid for bluetooth whole.

A few people have used the Parrot BT module and I considered it but eliminated it because I have a friend who has one installed in their vehicle and the sound is not good at all. It also does not use the BMW built in microphone. You can get the steering wheel control module too.

Good luck!

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Abster641