DIY: Replacing Final Stage Resistor on BMW E36 3-Series M3

BMW Final Stage Resistor Replacement DIY 

All the lights on your digital climate control are working and the buttons respond but the blower doesn't blow any air.

1996, 1997, 1998, 1999 BMW E36 3-series and M3

Phillips screw driver
Torx 20 driver
10mm socket, ratchet and extension

Parts: (New)
64.11-8 380 580 (Old)

Product Listings:



  • First thing we need to do is buy a final stage unit. Costs about $100 at the dealer if you have the discount, otherwise it'll be about $125. Apparently there are two part numbers for this part they both look the same but I'm guessing the new one has been improved. Anyway you only need the new part the old one is the one you're replacing. Here's what it looks like:
  • Now we need to take off the driver's side knee bolster. This only requires you to remove two screws, one on the right side of the bolster and one on the left. Using the philips screwdriver remove the following screws:
  • Now remove the speaker and foot well light.
  • Using the 10mm socket remove the 3 bolts holding the metal shield. And using the philips screwdriver remove the obd2 port.
  • Now you should be able to see the foot well air duct. Remove it by pulling it.
  • With everything out of the way you should now be able to see the defective final stage unit. Remove it using the torx-20 screw driver.
  • Replace it with the new part and before you put everything back turn on your car and test the blower. If everything is ok proceed to put everything back, and enjoy the benefits of having a blower in your car again.

Couple videos sourced from YouTube: