Generally, the symptom of the final stage resistor is modulating air flow. If you are not getting any air, you should first check all of the related fuses (check the manual for location) and if they are OK than move on to the FSR. Does the fan blow at all?

Any word on the "split axle"?

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2013 X5 3.5i M Sport
2004 M3 cabriolet SMG