Quote Originally Posted by minytrker View Post
As far as I know you cant change the vin in a E92 ECM and make it stay. Dont know anyone who has done it.
That isn't correct, VIN change on the E92 works just fine. Often people get caught out on bench harness setups or conversions where they don't use an IGN +12V input and they switch battery power as well so when they turn off power the ECM loses all power.
The actual VIN change is committed to flash when the ECM is shutting down, not when the commands are sent. So if your power setup isn't correct (again assuming on a bench) then the VIN will never be updated in the flash memory.