Blower Final Stage Fan Resistor May Fail on BMW 540i

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: 110,600 (10,009–202,000)
7 model years affected: 1997, 1998, 1999, 2000, more2001, 2002, 2003
18 people reported this problem
7 people shared problem details
2001 BMW 540i153,000
Blower motor continues to run even with the ignition off, and key fully removed. (it's really freaky). Found parts online $60, readily available. (My local dealer, BMW Concord, CA. quoted me $193 for the part), found video on YouTube how to replace, took about 20 minutes.
1998 BMW 540i105,000
Blower resistor went out, fan control eratic. Replaced for $70
1999 BMW 540i123,000
Fan just won't turn on although the lights for it show it cranking.
1999 BMW 540i135,000
Continuing running of the blower after car is turned off. Only 2 speeds of blower; on or off. Cold or hot.
Dealer replaced fan transistor (I think) due to intermittent failure.
2003 BMW 540i39,000
Fan speed allways on low.
Caused battery to go dead. Replacing part fixed problem
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