You can run it like this for a longer time...

I have ran in rwd mode for about 3 weeks just testing..

Unplug transfer case actuator plug underneath the car, you will only lose DSC function, abs is still active and no brake lights.

Another thing with this is if you are air suspension equipped you will not be able to use the up/down functions, it is intertwined with the dsc/abs system. But it will keep proper height.

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2006 X5 4.8is Fully Loaded