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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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  #1  
Old 01-04-2006, 02:51 PM
texlnghorn texlnghorn is offline
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Location: Texas
 
Join Date: Jan 2006
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Mein Auto: 323i
Final Stage Resistor Instructions

I appear to have the dreaded AC fluctuating fan speed problem and I believe it might be a faulty final stage resistor. I did a search and found lots of people talking about how the instructions on this site helped them but I cannot locate the repair instructions. I found these instructions for a 540.

http://www.540i6.com/finalstagereplacement.html

Is the procedure the same for an E46 Bimmer? If not, where can I find the instructions for the repair of the final stage resistor?

-Mike
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  #2  
Old 01-04-2006, 05:50 PM
alpinewhite325i alpinewhite325i is offline
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I don't think it's that easy on the e46.
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  #3  
Old 01-04-2006, 07:31 PM
texlnghorn texlnghorn is offline
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Location: Texas
 
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Quote:
Originally Posted by alpinewhite325i
I don't think it's that easy on the e46.
You're right, it's not that simple. I found a good step by step discussion with photos here:
http://forum.e46fanatics.com/showthr...ht=final+stage
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  #4  
Old 06-01-2008, 05:50 AM
maryper70 maryper70 is offline
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Location: Newport, RI USA
 
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Mein Auto: 2001 325I
Final Stage resisting replaced for my 325I 2001 E46

--------------------------------------------------------------------------------

I just wanted to take the opportunity to say thank you to all of you, this is a great forum. I was having some problems with my heating and cooling fan when my car was off. This issue was driving me insane as the battery was dying on me every morning. I searched that problem that I found the solution here , it was very helpful I managed to get the Final Stage at the dealer and able to replace myself, I am a chick so It was a little bit challenging as I needed to remove the Glove Compartment and the space was very uncomfortable. I saved myself a lot of money , If I would had bring my car to the " stealer" it would had cost me around $ 400. I am so proud that I did it . The problem has been resolved.
Thank you all this place is great
Maria :thumb up:
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  #5  
Old 11-22-2008, 05:11 PM
A325iBMW A325iBMW is offline
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Final Stage Unit

Mixed emotions.....the post on the final stage unit was perfect. It helped me demystify my possessed 325i ventilation system. Thanks a million.
I'm not a gear head but I got to the FSU in about .5 hrs but couldn't figure out how to get the FSU past the plunger linage(?) until I got fed up and used a screwdriver. All's well that ends well. 300-1200 in my pocket and my ventilation system works fine
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  #6  
Old 04-17-2009, 11:53 AM
Angie Braden Angie Braden is offline
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Does this procedure work for a 5 series? I am having this issue also and It's driving me crazy!
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  #7  
Old 04-17-2009, 03:47 PM
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kunal_D kunal_D is offline
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It's funny, a brand new resistor was in my glove box in when I bought the car. I didn't even know what it was until 2 mths later when my HVAC became possessed, and I stopped using it as a paper weight and put it in. I guess the folks at the stealer that sold me my car hadno confidence in the resistor so they inlcluded one
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  #8  
Old 04-17-2009, 03:49 PM
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kunal_D kunal_D is offline
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Quote:
Originally Posted by Angie Braden View Post
Does this procedure work for a 5 series? I am having this issue also and It's driving me crazy!
Please refer to the first post
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  #9  
Old 11-10-2009, 03:56 PM
mromero_05 mromero_05 is offline
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I'm new to all this, so please forgive my ignorance. I have a 2001 BMW 325ci (she's ready and a beauty) I'm assuming that's considered an E46, correct? If so I guess I can use the guide provided in this forum to change out the Final Stage Resistor...?
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  #10  
Old 11-10-2009, 03:56 PM
mromero_05 mromero_05 is offline
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I'm new to all this, so please forgive my ignorance. I have a 2001 BMW 325ci (she's red and a beauty) I'm assuming that's considered an E46, correct? If so I guess I can use the guide provided in this forum to change out the Final Stage Resistor...?
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  #11  
Old 11-10-2009, 04:02 PM
jcourcoul jcourcoul is offline
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Quote:
Originally Posted by mromero_05 View Post
I have a 2001 BMW 325ci (she's red and a beauty) I'm assuming that's considered an E46, correct? If so I guess I can use the guide provided in this forum to change out the Final Stage Resistor...?
  • Yes, a 2001 325Ci is a 3-Series E46.
  • Yes, the subject of this thread (except the 5 Series DIY on the very first post) applies.
  • No, it is considered poor form to duplicate your posts...
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  #12  
Old 11-10-2009, 04:03 PM
jcourcoul jcourcoul is offline
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Quote:
Originally Posted by mromero_05 View Post
I'm new to all this, so please forgive my ignorance. I have a 2001 BMW 325ci (she's red and a beauty) I'm assuming that's considered an E46, correct? If so I guess I can use the guide provided in this forum to change out the Final Stage Resistor...?
  • Yes, a 2001 325Ci is a 3-Series E46.
  • Yes, the subject of this thread (except the 5 Series DIY on the very first post) applies.
  • No, it is considered poor form to duplicate your posts...
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  #13  
Old 11-10-2009, 05:57 PM
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jvr826 jvr826 is offline
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Quote:
Originally Posted by jcourcoul View Post
  • No, it is considered poor form to duplicate your posts...
Interesting.
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  #14  
Old 10-12-2011, 03:44 PM
Bombay Badboy Bombay Badboy is offline
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Mein Auto: WHT 2001 BMW 325xi
Hi i have 2001 e46 325xi, My heater has been fluctuating for quite some time.... Then one day early last week it shut off while i was driving ( and changing gear, if that makes a difference)

I ordered another FSU and installed it today, but still have the same problem..


I checked fuses 28,62,63, all were okay. What else could it be? If i want heat as of right now i need to crack my window open which then sucks air from the vents.....
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  #15  
Old 08-27-2012, 05:06 PM
bgorham bgorham is offline
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Location: San Diego
 
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Mein Auto: 01 325I
Red face A/C fan runs continually in off position

I just replaced the final stage resistor on my daughters 325I and the fan started running immediately after I plugged the new one in, problem is the car is turned off and the keys are out of the ignition!

What gives?
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