BMW 528i Problem Report

BMW 528i Blower Final Stage Fan Resistor May Fail

(11 reports)

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.

Blower motor worked erratically, then gave up entirely. BMW dealer mechanic said this is common for the vintage. -
Same symptoms as described. Replaced FSU/Blower Motor Resistor and problem seems to be solved. Made the repair myself. Part cost $67 at an import car parts store. Net savings of $183 from dealer costs (labor & parts). -
Fan flows at full blast. Dealer fix under warranty -
heater motor under hood runs and drains battery after engine shut off.. resets of computer by battery disconnects with turn off of heater fan stops this but is very inconvenient -
blower fan speed increases and decreases eratically. went away after the internal resistor was replaced. -
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