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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 11-12-2010, 09:16 PM   #1
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Join Date: Mar 2010
Location: Nz
Posts: 78
My Ride: Mspec 325i 2001
Question Which one is this stepper control motor and what does it do.

Guys I had to change out my final stage resistor on my 2001 325i, When i was wiggling it loose it came out all of a sudden but on the way out ripped the male plug component off the stepper motor. Looking at real oem i am not sure which one I am supposed to be looking at replacing and does anybody know what this particular stepper motor does. ??

First pic is the stuffed piece followed by where it goes (right in front of where the final stage resistor is) and the last 2 pics are what i am looking at in oem and not sure which this piece is. I have a feeling its the one i have highlighted in the first real oem pic and it goes into the bracket marked 7. Oh my car is RHD as well.

Last edited by newspec; 11-12-2010 at 09:19 PM.
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Old 11-13-2010, 11:12 AM   #2
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Join Date: Mar 2010
Location: Dallas, TX (USA)
Posts: 2,213
My Ride: E46 330i
The actuator (stepper motor) controls the air circulation vanes/vents, directing the flow of air to the proper outlets. The best is to take that part to your local dealer to verify/confirm its part#.

It's such a tight space back behind the dash, who know what you end up snapping or yanking out.
Good luck.
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