I used NavCoder, but only with a U.S. CDMA TCU. Most of the others I am familiar with used NavCoder.

I have only done cars 2002 and older that predated the Assist TCU. So, I did not actually attempt to code the car for the TCU (or ULF). I merely used NavCoder to enable the TCU features that I wanted, such as Bluetooth (when necessary) and voice recognition. I left the car's phone coding as it was.

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SOLD
2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input