We need a couple data points to help you...

1) What is the year and model of your car?
2) What is the part number of your TCU or ULF? (You will have to do some disassembly to find the part and manually read off the part number.)

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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