[lupu_sandu]

X6 E71 BMW X6 40dX. Type Code: FH02
Your car will not engage gearbox if you don't pair ECU with car

[iyade46]

X6 E71 BMW X6 40dX. Type Code: FH02
Your car will not engage gearbox if you don't pair ECU with car

i will not change any thing in CAS ISN just ecu immo off it should work 
if not then what is the other way?
can virgine it

[lupu_sandu]

I already wrote what you need to do.
Pair ecu with your car

[PsiDOC]

There are tools out there to clear the ISN from the gearbox which will allow it to be run standalone.
The other option is to flash a 2wd software to the 6HP which never had this feature.