Blower Final Stage Fan Resistor May Fail on BMW M5

The blower final stage fan resistor is known to fail. Symptoms are the heater fan speed varies regardless of the setting, the fan will not turn off when the car is switched off, or the fan will not switch on at all.

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Average mileage: 59,250 (35,000–83,500)
4 model years affected: 2000, 2001, 2002, 2003
6 people reported this problem
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problem details
2002 BMW M5 35,000 mi,
I had this problem, and it kept killing my battery
no blowing from vent or AC; fixed at dealer