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Old 09-09-2013, 06:22 AM
Fred Parmenter Fred Parmenter is offline
Registered User
Location: Medfield, MA
Join Date: Feb 2011
Posts: 34
Mein Auto: Z3 Black 2.8 2000 Roadstr
Final Stage Blower Resistor Replacement

Recently I had to replace the FSR (final stage resistor) in my Z3. Checking out this site gave me the help I needed. Many thanks to all who took the time to document the process.

Removing the glove box and wide plastic panel below it went without a hitch. That darn black air duct in the footwell was a real problem. As others have noted the FSR is behind another module, and both of these units are behind the air duct. For the life of me I could not figure out how to get that air duct off so I could better see. But as the users here have pointed out it is not necessary. So I wanted to reaffirm that, the air duct does not need to be removed. It is a real pain, but you can remove the two torx screws from the module blocking the FSR, swing that module out of the way, and then finally be able to see the FSR, all without removing the air duct I was told that the FSR was also held in by two torx screws, but I did not find that to be the case. My FSR was held in by a snap on the right. Pushing a screw driver in there to push the snap back allowed the FSR to come out (albeit with lots of tugging - for some reason it doesn't just easily slide out - I don't why there is so much friction).

Then with the FSR out and dangling I unplugged the electrical connection (by squeezing down on the two latches to free their rear catches).

There is really only one way I can contribute to the knowledge on this subject. And that is, when I was putting the new FSP back it would now easily slide in far enough for the snap to catch it. So I took a wide screw driver and a small hand sledge hammer. I positioned the screw driver on the side of the FSR and gave its handle a gentle tap from my sledge hammer and it popped right in and the snap snapped. I did the same on the left side (although there is no snap there). That seemed to pop in the left side also.

Thanks again to all who contributed.
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