For F9x M cars
Adds a selectable rear-wheel-drive (2WD) mode to the F97 X3 M and F98 X4 M, using the F90 M5 settings. Choose 2WD from the M xDrive screen in iDrive, or put it on your M1 or M2 button.
It's very responsive, and there's no need to reflash every time you want to switch back and forth. We've coded it remotely for customers in the USA and Hungary, or do it at the workshop.