Blower Final Stage Fan Resistor May Fail on BMW 330Ci

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 113,500 (77,000–161,000)
3 model years affected: 2001, 2002, 2003
15 people reported this problem
Viewing 1 - 6 of 6 comments
The problem beagn with an erratic performance of the blower motor. It would run at different speeds and ultimately would not shut off even with the key removed, folowed by an electrical burning smell and then nothing would work. It was the final stage unit (aka the fan resistor) $220.00 to fix at the local gargae.
Same irratic fan speeds shuts off and on while running ac/heater. Will run when car is turned off, and with no key in ignition. Didn't know what was wrong. Thank you for this site. Now I will get this fixed.
A/C fan speed fluctuates regardless of setting. Purchased replacment final speed unit from Pelican Parts for $29.00 and replaced myself in under an hour. While replaceing unit, noticed evidence of the part being previously replaced, so this may have been the second failure since new. ( I am second owner )