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Old 10-14-2018, 01:27 AM
Join Date: Jul 2017
Location: Owensboro, KY - USA
Posts: 124
270_BMW is on a distinguished road
I understand how hard time can be to come by, this repair if you already have the blower motor on hand takes roughly 3.5-4 Hours to do a full tear down.

If you have a power drill with an extension and take pictures at each step you could probably knock it down in a little less time.


The only issue I had was removing the steering wheel because one of my pick tools broke.. hurrah snap-on "quality"

Removal of the A Pillar Covers...
Removal of the glove box...
Removal of the Radio...
Removal of the AC Head Unit...
Removal of the gear shift nob...
Removal of the center console guts...
Removal of the center console...

Dozens of screws later....

Removal of the passenger side airbag...
Removal of the driver airbag...
Removal of steering wheel...

(Also make sure the steering wheel column is all the way down before you disconnect the battery.)

Dash Removal...
Removal of the Cover of blower motor...

My blower motor fan actually got off balance and exploded all over the container, so after removal of the tiny bits I was able to toss it all back together.

A foot note.. my steering wheel ended up being about 25 degrees to the left... don't make my mistake. Lol.
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Old 10-17-2018, 07:32 PM
Join Date: May 2017
Location: Northwest CT
Posts: 87
ChiefRider is on a distinguished road
Had the shop look at my blower motor today. The shop owner is a BMW guy, and in investigating the problem worked back to checking continuity in the motor, finding continuity. He then applied 12v directly to the motor and it spooled up just fine. After plugging everything back in, the blower seems to be fully operational. His working theory is there may have been a dead spot in the armature. Repeated stops and starts are working, so we'll go with that for now.

2004 3.0 6 speed manual
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Old 10-17-2018, 11:43 PM
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,151
cn90 is on a distinguished road
I wrote a Trouble-shooting uide for FSR for my 1998 528i E39...

Very simple if you understand it...


Now you can see that if you are stuck with a failed FSR, you can easily by-pass it with:
- Jumper in #1 and #4: completing the ground circuit
- Another jumper in #2 and #5, feeding the blower with full 12V, it will run at max speed. If blower motor does not run, then blower motor is dead.
If blower motor runs full-speed, then FSR is dead.
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
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Old 10-18-2018, 03:43 PM
Join Date: May 2017
Location: Northwest CT
Posts: 87
ChiefRider is on a distinguished road
Nice thread, thank you for that link!

I now have 2 good FSU's, the one I removed, and the new one installed!

The blower seems to be running as it should- for now! It sounds fine, and responds to all speed settings. Fingers crossed it just stays that way!

2004 3.0 6 speed manual
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