Just to make things more confusing than they already are....There are actually 6 Bluetooth systems from BMW, which are ALL slightly different.

1) BMW Assist/Bluetooth Ibus TCU (starting in late 05 they had male voice recognition). This is the system you get when ordering assist in the US 2006 X5, E46, Z4 (1 version for US CDMA and one for ECE GSM) This module was made by Motorola

2) BMW Assist/Bluetooth MOST TCU system from the new Body style BMWs with MOST bus. This is the system you get when ordering assist in the US e60, e90 ect (1 version for US CDMA and one for ECE GSM) This module was made by Motorola

3) BTUM stupid little dongle deal for cars with the CPT9000 phone system. (only for the US market)

4) BMW Assist /bluetooth for E65. This is only for the E65/E66, but similar to the MOST TCU (1 version for US CDMA and one for ECE GSM) This module was made by Motorola

5) BMW ULF module. I-bus This is the retrofit system that everyone knows. It is the best option for people wanting Bluetooth. no coding needed, bluetooth and full voice recognition. Current version P/N 130 10th Gen (latest version only a couple weeks old) X5, X3, E46, E39, E38, Z8, Z4 (This module was made by Visteon)

6) BMW MULF module MOST bus ULF module. This is the retrofit system for the New body style BMWs. It works great, but needs coding due to fiber optic system in new body style BMWs. P/N 290 is latest version (only a couple weeks old) E60, E63, E90 (This module was made by Visteon)

Martin