Apr 24, 2016 13 Common Problems on BMW E46 Chassis Models. Blower Motor Final Stage Fan Resistor Failure. If you start noticing 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, these are all the symptoms of the Final Stage Resistor failure. 2018 Online shopping for popular & hot Bmw E46 Heater Blower from Automobiles & Motorcycles, Blower Motors, Air-conditioning Installation and more related Bmw E46 Heater Blower like Bmw E46 Heater Blower. Discover over 153 of the best Selection Bmw E46 Heater Blower on Aliexpress.com. Besides, various selected Bmw E46 Heater Blower brands are prepared for you to choose.
If you have a BMW E46, E39, X5, and I think the E36 with climate control and your heater fan has a mind of its own it is most likely the final stage resistor that is causing the problem. In my case the fan stopped blowing, then after a day or two worked fine again for weeks, then stopped completely. Other people report the fan changing speed for no reason. The final stage resistor located just to the left of the clutch pedal on RHD cars. It is located in an awkward location but it is possible for you to replace this with no special tools.
There are a couple of good guides on the internet to help you out. The first one I found on the Motormec website and it looks like it was originally an article from Total BMW Magazine http://www.motormec.co.uk/aircon.pdf, it gives a good introduction and a good overview. The second one is from the E46 Fanatics website and it is very detailed with some excellent pictures http://www.e46fanatics.com/forum/showthread.php?t=794644. This guide from Impee.co.uk has some very clear pictures but is not as detailed as the e46 Fanatics guide http://impee.co.uk/bmw_final_stage_resistor.htm.
There are a couple of good guides on the internet to help you out. The first one I found on the Motormec website and it looks like it was originally an article from Total BMW Magazine http://www.motormec.co.uk/aircon.pdf, it gives a good introduction and a good overview. The second one is from the E46 Fanatics website and it is very detailed with some excellent pictures http://www.e46fanatics.com/forum/showthread.php?t=794644. This guide from Impee.co.uk has some very clear pictures but is not as detailed as the e46 Fanatics guide http://impee.co.uk/bmw_final_stage_resistor.htm.
The tools I used were a ratchet with a short extension and a Torx t-20 bit, a philips screwdriver, and a torch. The most difficult part of the whole process is removing the top screw from the stepper motor because it is hidden well out of sight. If you rub your finger along the top of the stepper motor housing to the left of the stepper motor you will though feel the channel with the screw located at the end. It is the top left screw in this image.
Here is a picture of the Final Stage Resistor also known as the hedgehog. It is BMW part number 64116920365 and it is probably worth shopping around for one as they can be expensive direct from BMW.
5Help anyone...my heater, ac, fan will not blow air. I have a bmw 2000 323i wagon. Fuses look good..what else can I check?
the fan itself may be burned out.
Yes, check to see if the fan motor is good or not...
Can be the fan-resistor! Located at the right lower part of the heaterbox, under the dash!
Automatic trans or Manual trans... did you try turning the AC on and checking if the fan starts to run?
I have a BMW e30 325 it was starting yesterday but now it lost the spark from the coil to distributor, now it doesn't start what must look up for to find the spark.
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