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E46 (1999 - 2006)
The fourth generation 3 Series (E46 chassis) was introduced in 1999 and set the standard for engineering and performance during it's years of production including being named to Car & Driver's 10 best list every one of those years! ! -- View the E46 Wiki

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  #151  
Old 10-13-2012, 07:13 PM
akabdog akabdog is offline
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Location: belmont, ca
 
Join Date: Oct 2012
Posts: 2
Mein Auto: 2000 BMW 323i e46
Your correct sir, thanks for the quick reply.
Switching from external to internal air does activate that motor (well its more of a actuator, imo).
I rarely use re-circulation (unless I'm in cow country), but I may still replace it, if someone knows the part and how to do it... maybe I'll leave my glove box off for a week and see if anyone replies.

Thanks again!

Quote:
Originally Posted by Starless View Post
My understanding is that this motor is responsible for switching between supplying the flow of air from the outside and re-circulating air withing the cabin. Activated by the corresponding buttons below the HVAC controls. You can live without it but if there is a diesel truck in front of you, re-circulation usually helps :-) Not sure how to go about fixing it, I'd somehow figure that out if I needed to, but I've never done it before.
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  #152  
Old 11-29-2012, 05:59 AM
athomas387 athomas387 is offline
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Location: Atlanta
 
Join Date: Nov 2012
Posts: 1
Mein Auto: 2003 BMW 325(wifes)
Simply Awesome

DYI is flawless. Removed the FSU in wifes car after a year of her delaying nd stalling from a dealer shop visit.
Done in less than when I deduct the time forgetting that there is a tab holding the FSU in place.

Thanks Starless.
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  #153  
Old 12-27-2012, 03:55 PM
jaysubway jaysubway is offline
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Location: gainesville, ga
 
Join Date: Dec 2012
Posts: 1
Mein Auto: 2002 BMW 325xi
is there a way to check this? sorry if this has been answered and I missed it. fuse is good. fan used to flutter a little once in a while. But nothing really bad.. today fan turned on and then a second later quit completely. could the fsu be the problem or the fan motor itself? any thoughts?

thanks a lot in advance

jay
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  #154  
Old 05-03-2013, 05:40 PM
MOOSE4GOLF MOOSE4GOLF is offline
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Location: Central PA
 
Join Date: Aug 2009
Posts: 10
Mein Auto: 2002 330I
Fresh from completing my replacement FSU.
Couple of comments: I also did not remove the control, merely positioned it out of the way a bit. I did, however remove the air tunnel. I don't know how easily the swap would have been without completely removing it but I would suggest trying to swap without removing the air tunnel first. Reason is it is hard to get it repositioned completely. I think I finally got it back as it should be. Related to that, make sure your actuators work properly before buttoning everything back up. Mine were. just turn the key on and select the floor vent, then the dash vent and watch the upper actuator movement (above the tunnel). Also check the "recirc" button and observe the actuator arm down by the FSU. I also left the connector on the old FSU until I pulled it out, made it easier to unlatch the connector I believe.

Thanks to all for the documentation of their replacement, especially Starless for the great pics. If anyone has a question i'll try to answer (I don't get on here everyday though).
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  #155  
Old 05-03-2013, 07:02 PM
MOOSE4GOLF MOOSE4GOLF is offline
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Location: Central PA
 
Join Date: Aug 2009
Posts: 10
Mein Auto: 2002 330I
BTW, I received the exact same part as Starless got, although from a different vender, shown in the first pic in the original post to this thread. Mine was $59.95 plus S/H from Turner motorsports. I had specified in my order that the part must be Made in Germany, not China. I received a nice e-mail confirmation that my order was being processed and that the part was in fact made in Germany.

My original FSU also was exactly like the pic #10 in the original post. Hopefully the new 58-pin heat sink will not have the same issue down the road.

Last edited by MOOSE4GOLF; 05-03-2013 at 07:04 PM. Reason: sp.
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  #156  
Old 05-03-2013, 09:35 PM
tol4o tol4o is offline
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Location: Boston, MA
 
Join Date: Jul 2010
Posts: 181
Mein Auto: E46M3 & X5D
I replaced mine last summer and I can confirm it's PITA
Be prepared to:
- sweat like a pig and lose 2-3 pounds of weight /my advice have a gallon of water close by/
- stay at least half an hour with your body position at 45 degree legs up and head shoveled under the glove box
- wish you had a third hand for the flashlight
- swear like never before
- after all you will be proud that you did it yourself and nobody can take you away that pleasure
Good luck
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2011 X5 xdrive35D - The Ultimate Oil Burner - Alpine White / Oyster - Premium - Technology - Winter - Comfort Access - Rear Climate - 3rd Row - Roof Rails - Running Boards - Ipod/USB Adapter
2004 E46 ///M3 6SP Manual - Imola Red / Cinnamon - Premium - Luxury - Winter
2004 X3 E83 2.5i Auto (SOLD)
1996 318ti E36 Hatchback 4-cyl 5SP Manual (SOLD)

Last edited by tol4o; 05-03-2013 at 09:37 PM.
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  #157  
Old 05-12-2013, 05:27 AM
knopp113 knopp113 is offline
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Location: Staunton, Va.
 
Join Date: Apr 2013
Posts: 5
Mein Auto: 2003 BMW 325xi
We don't get ac out of the center vent, just warm to hot, even when the vent setting is on 3 blue dots. Could this be a faulty fsu? Thanks
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  #158  
Old 05-22-2013, 10:22 PM
Takashi Alfred Takashi Alfred is offline
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Location: Houston
 
Join Date: May 2013
Posts: 1
Mein Auto: 525i
Exclamation I clean up FUS or Blower Motor Resistor

Hi, I am new here but I really thank you experts for the information in 525i series.
My car stop blowing air at all, and here in Houston the temperature is going up each day, I was about to order the FSU replacement part, but I have to wait 2 days for shipping. Well then I have the idea to clean up the FSU, I use the CRC Mass Air Flow sensor cleaner, and it works great, I spray the large pins with out touching any electronic device, I wait the same time as I were cleaning my Air Sensor, and finally I put it back in place, Turn on my car and YES, YES!,,,it really works . At least it will save me a few dollars until the part fails again. I will post back if I have the problem back. Thank you for all the information, I really feel my self a DYS Guy!!!
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  #159  
Old 05-23-2013, 10:41 PM
GoForthFast GoForthFast is offline
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Location: New York
 
Join Date: Jul 2004
Posts: 2,327
Mein Auto: '04 330Ci 6-speed
Sorry to be the downer that tells you your repair is bogus. Will fail again soon and might darn well leave you stranded.
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  #160  
Old 08-24-2013, 06:41 PM
Yazied Yazied is offline
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Location: Ky
 
Join Date: Aug 2013
Posts: 23
Mein Auto: 325ci 528i
DIY: FSU (aka Blower Motor Resistor) replacement pictorial guide

Does this also apply to a 2001 325 ci ?


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  #161  
Old 08-24-2013, 07:31 PM
Starless Starless is offline
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Location: STL, MO
 
Join Date: Sep 2009
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Mein Auto: 2002 325i Auto
DIY: FSU (aka Blower Motor Resistor) replacement pictorial guide

Quote:
Originally Posted by Yazied View Post
Does this also apply to a 2001 325 ci ?


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Absolutely, still an e46 :-)


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  #162  
Old 08-24-2013, 07:36 PM
Yazied Yazied is offline
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Location: Ky
 
Join Date: Aug 2013
Posts: 23
Mein Auto: 325ci 528i
DIY: FSU (aka Blower Motor Resistor) replacement pictorial guide

Awesome man ! Bought mine last week , replaced a couple things so far , the blower works but runs high speed only . Also I turn it off when I shut the car off but when I start the car it's on by itself ! Hope replacing the fsu will resolve that tooClick image for larger version

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  #163  
Old 08-24-2013, 08:12 PM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,521
Mein Auto: 02 BMW 525i M54 auto 130K
Just for the record, see these related FSU/FSR threads:
- How to troubleshoot a bad FSU final stage unit (1) and how to build a test jig for your FSR final stage resistor (1) & how to autopsy or repair solder cracks in your blower motor resistor (1) & how to replace your HVAC blower resistor (1) & what FSU is the right one to buy (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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  #164  
Old 08-30-2013, 09:19 AM
Yazied Yazied is offline
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Location: Ky
 
Join Date: Aug 2013
Posts: 23
Mein Auto: 325ci 528i
DIY: FSU (aka Blower Motor Resistor) replacement pictorial guide

For it replaced a couple days ago , tool me about 45 mins


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  #165  
Old 10-30-2013, 02:40 PM
naftaturbo naftaturbo is offline
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Location: ca
 
Join Date: Jul 2005
Posts: 1
Mein Auto: Mustang SVO
Adding my thanks

Wanted to add my gratitude for a fine posting. Just changed the FSU on my wife's 2001 325i and thanks to the pictorial posting it was an easy job.

For the question about holding the torx screw on the driver to reach the upper mounting point, I suggest magnetizing the screwdriver. I used a torx bit from a kit which requires a 1/4" socket to mount the bit in. My electric screwdriver accessory kit includes a couple of magnetized extensions so I used those. The magnets are strong enough that it keeps the screw on the torx bit.

If you have drive up ramps, use those and drive up the front wheels. That lifts the car enough so that less of a contortion is required working under the dash. And knee protectors add to making it easy.

But the posting was the key tool in making this job easy.
Thanks again!
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  #166  
Old 11-09-2013, 01:45 PM
Horch325 Horch325 is offline
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Location: NY
 
Join Date: Nov 2013
Posts: 1
Mein Auto: 325
Smile FSU Repair

Thank you Starless!!

$40 part which would take +$200 for stealer/labor!

You inspired me, and with a Torx 20 in hand I was able to remove using your incredible pictures and discriptions.

Thank you! (Sorry about your Birds vs. Red Sox)

J
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  #167  
Old 02-22-2014, 10:34 PM
[spurt] [spurt] is offline
admittedly SLICK
Location: Germany
 
Join Date: Jan 2008
Posts: 20
Mein Auto: 2002 325i (E46)
Thanks for the great DIY. My install went smooth and took about 30 minutes.


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  #168  
Old 04-29-2014, 05:51 PM
Robertooberto Robertooberto is offline
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Location: Texas
 
Join Date: Apr 2014
Posts: 35
Mein Auto: 2000 323i
Thanks for this. I asked yesterday for some info or pictures on doing this and I'm glad I could find this thread
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  #169  
Old 04-30-2014, 07:36 PM
Starless Starless is offline
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Location: STL, MO
 
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Posts: 1,621
Mein Auto: 2002 325i Auto
You are welcome guys, 4 years later the new FSU does not miss a beat.
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  #170  
Old 06-07-2014, 11:04 PM
ETHERSEEKER ETHERSEEKER is offline
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Location: SEATTLE
 
Join Date: Jun 2014
Posts: 1
Mein Auto: 325CI COUPE 2004
Original FSU went 115 K then went out .... replaced with updated model ..... now this just went out with less than 5,000 K ..... tic nology is grand ...... how about a bypass, no auto function ..... just manual/select control without the FSU ..... ??? Is this possible .... calling all Neanderthals .....
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  #171  
Old 07-15-2014, 07:34 PM
Dreasdoku Dreasdoku is offline
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Location: Gresham, Oregon
 
Join Date: May 2014
Posts: 20
Mein Auto: 2000 BMW 323i
First this DIY is awesome and as soon as I get the part in hand I am doing it. I do have one question though. I went to the site you suggested and found to different blower regulators. One says regulator which is made by Behr for $44.99 and the other is genuine BMW, says regulator and is $105.99. Here are the two it shows:

http://www.eeuroparts.com/Parts/3526...-64116920365G/

http://www.eeuroparts.com/Parts/2844...r-64116923204/

Will either one work or must it be the BMW one? I need to do this really soon because by the time I get off work in the afternoon it is around 115 degrees inside and the leather seats are really uncomfortable. At 6' 3" and 250lbs this is going to be an awkward DIY for me but I am up to the challenge. Which one would you suggest I get? Thanks for any help. I appreciate it.
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  #172  
Old 07-16-2014, 07:48 AM
tol4o tol4o is offline
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Location: Boston, MA
 
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Posts: 181
Mein Auto: E46M3 & X5D
I got the cheaper one 2 years ago, no problems so far works perfect. Behr is BMW OEM supplier anyway
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2011 X5 xdrive35D - The Ultimate Oil Burner - Alpine White / Oyster - Premium - Technology - Winter - Comfort Access - Rear Climate - 3rd Row - Roof Rails - Running Boards - Ipod/USB Adapter
2004 E46 ///M3 6SP Manual - Imola Red / Cinnamon - Premium - Luxury - Winter
2004 X3 E83 2.5i Auto (SOLD)
1996 318ti E36 Hatchback 4-cyl 5SP Manual (SOLD)

Last edited by tol4o; 07-16-2014 at 07:49 AM.
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  #173  
Old 07-17-2014, 04:48 AM
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APSXwideband APSXwideband is offline
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Location: Cincinnati, OH
 
Join Date: May 2014
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Mein Auto: BMW 3-series
Quote:
Originally Posted by tol4o View Post
I got the cheaper one 2 years ago, no problems so far works perfect. Behr is BMW OEM supplier anyway

Why dont you guys get our FSU at wide-band.com? It is very popular nowadays.


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