After waisting a lot of time with TCUs, I have found it is best to stick with the ULF modules.
Best Sellers BMW Bluetooth Kits All EURO models 1995-upto 03/02 mfg. date has the BITII to ULF conversion using the ULF module
The TCU works in this setup as well, but I have found the ULF modules far better and less troublesome than the TCUs.