Car Problem Reports

BMW 328i Blower Final Stage Fan Resistor May Fail

BMW 328i Problem
16 Reports
Me Too

Model Years Affected: 1997, 1999, 2000, 2007

Average Mileage: 129,784 mi (65,000 mi - 218,000 mi)


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.

  • Natha, , 65,000 mi

    The air conditioner would work, and you could tell it was cold but the air would not blow out of the vents. Also this would happen off and on for about 6 months. The air conditioning would work and blow cold air, then it seemed like on the really HOT days it would not blow the cold air at all, so i had enough!!! Replaced the final stage transistor and Yeah that fixed the problem!!!!!!!!!!!

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  • Visitor, , 73,000 mi

    Taking to the dealer on Monday.

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  • Visitor, , 124,323 mi

    Fan not blowing when the heart or air condition is on.

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  • Visitor, , 160,000 mi

    A/C starts and stops unpredictably as if a connection is loose.
    Perhaps I will have to try replacing the final stage fan transistor whatever that is.

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  • Visitor, , 90,000 mi

    sometimes fan doesnt work

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  • Visitor, , 102,090 mi

    Blower goes on intermittently. They want to replace whole resistor for $400+

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  • Visitor, , 143,000 mi

    the a/c would turn on when it wanted,first i thought it was a loose connection point, wrong! I'm now going to replace the final stage resistor, pray to god. I live in Las Vegas, and it's HOT!!!!!

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  • Visitor, , 212,000 mi

    AC/Heater fan only works sporadically and almost never when you need it. No solution

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