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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 08-18-2012, 06:49 AM
jester4066 jester4066 is offline
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Location: CT
 
Join Date: Aug 2012
Posts: 12
Mein Auto: E46 325I
BMW E46 Thermostat

I have to replace the thermostat on my 03 325i, do i need to replace the entire housing or just the thermostat itself and if so where can I buy just the thermostat. Thanks, jester
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Old 08-18-2012, 09:00 AM
alfabmw1 alfabmw1 is offline
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Location: Massachusetts
 
Join Date: Jun 2010
Posts: 195
Mein Auto: 2001 325 xi
You need to replace the whole thing, it looks like this;

http://www.bavauto.com/lview.asp?img...1530139877.jpg

You should consider changing some of the other cooling related items while you are at it. Expansion tank, water pump hoses, etc.
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Old 08-18-2012, 02:25 PM
ALM168 ALM168 is offline
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Location: NJ
 
Join Date: May 2012
Posts: 73
Mein Auto: Z3, e46, Ford Explorer
I agree depending on the mileage. If over 60K, and these items have not yet been replaced, consider replacing them now. If replacing the serpentine belts, change the idler pulley(s) and the belt tensioner(s).

-Al
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