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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-07-2010, 12:00 PM
harris2p harris2p is offline
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Mein Auto: 1998 BMW 528i (02/98)
Intake Air Temp (IAT) Sensor location on 1998 528i

Hi,

I have a Bentley repair manual but it shows a picture for the location of an Intake Air Temp sensor on car that is not 1998 528i. I spent about 15 minutes looking around the intake manifold but could not locate anything that looks like the IAT sensor mount. Could someone please point out the location of the IAT sensor on a (February) 1998 528i (automatic). My scan report shows an existing bad IAT sensor and I need to replace or clean it.

Thank you.
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  #2  
Old 06-07-2010, 12:16 PM
cn90 cn90 is offline
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You are lucky! I wrote a DIY for ICV, CCV etc. you may as well do this whole Intake Manifold job for your 1998 528i:

DIY: Oil Line ---> Vanos, CCV, ICV and Alternator Air Duct (Very Long!)
http://www.bimmerfest.com/forums/sho...d.php?t=379225

Step #6 shows you the IAT in green color:

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  #3  
Old 06-07-2010, 01:44 PM
harris2p harris2p is offline
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Thanks for the quick reply. I feel lucky that my car has the same year as yours, and have been able to do a lot based on your DIY's and others. I will read through the DIY a few times and go shopping for parts.
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  #4  
Old 09-27-2012, 01:28 PM
josemedeiros007 josemedeiros007 is offline
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I am also trying to find my Intake Air Temp sensor on my 1998 528i. I had a recent engine swap, due to my previous engine overheating, and cracking the cylinder head, and I am now getting a Peak Research code of OE and 44 for table 11. I have a feeling that the sensor wire connecters were swapped by mistake. Can I get to the IAT connector with out removing the Intake Manifold again.
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  #5  
Old 09-27-2012, 01:53 PM
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16valex 16valex is offline
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Mein Auto: 530I/5SC 97-528/5
Quote:
Originally Posted by josemedeiros007 View Post
I am also trying to find my Intake Air Temp sensor on my 1998 528i. I had a recent engine swap, due to my previous engine overheating, and cracking the cylinder head, and I am now getting a Peak Research code of OE and 44 for table 11. I have a feeling that the sensor wire connecters were swapped by mistake. Can I get to the IAT connector with out removing the Intake Manifold again.

Yes, no need to remove IM.
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  #6  
Old 09-27-2012, 01:58 PM
josemedeiros007 josemedeiros007 is offline
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Thank you for the reply. The diagram I found online shows the sensor, but I can't seem to get to the connector with my fingers, it's bettwen a bracket and the throttle body is very close. Any suggestions, links or pictures you can post?
http://www.realoem.com/bmw/showparts...92&hg=11&fg=40
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  #7  
Old 09-27-2012, 03:03 PM
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16valex 16valex is offline
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Quote:
Originally Posted by josemedeiros007 View Post
Thank you for the reply. The diagram I found online shows the sensor, but I can't seem to get to the connector with my fingers, it's bettwen a bracket and the throttle body is very close. Any suggestions, links or pictures you can post?
http://www.realoem.com/bmw/showparts...92&hg=11&fg=40
You've got to take a few things apart to get to it.
At the minimum the throttle body has to come out.
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  #8  
Old 10-05-2012, 11:21 PM
josemedeiros007 josemedeiros007 is offline
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Thank you for the fast reply. I was able to work on this today, after some one posted a schematic for the sensor and wire color code for connector.
http://wds.spaghetticoder.org/en/svg...2314.svg?m=e39

It appears that the connecter with a a grey wire, and a grey wire with brown stripe is the correct connector for the IAT sensor, I was able to swap out the connector with out taking off the throttle body, and cleared the code using my Peak Research Code Reader, and so far the error code OE has not returned.

I still can't find the correct schematic for the Evap Purge Control Valve, to verify which sensor connector is the correct one.

Jose F. Medeiros
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  #9  
Old 10-06-2012, 05:10 PM
cn90 cn90 is offline
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Quote:
Originally Posted by josemedeiros007 View Post
...I still can't find the correct schematic for the Evap Purge Control Valve, to verify which sensor connector is the correct one.
See post #61:
http://www.bimmerfest.com/forums/sho...=459397&page=3
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  #10  
Old 10-06-2012, 05:55 PM
josemedeiros007 josemedeiros007 is offline
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Thank you the link to the other BIMMER forum posting on the Secondary Air System, and Air Valve schematics and replacement.

I am finding that a Evap Purge Control Valve is being called a Charcoal Filter Valve and Fuel tank vent valve on the BMW schematic site that's online.
http://wds.spaghetticoder.org/en/

And on the forum link that you just posted, "http://www.bimmerfest.com/forums/showthread.php?t=459397&page=3" ,the Air Pump Vacuum Control Valve made by Peirburg is called a Air valve?
http://www.fcpeuro.com/products/bmw-...em-11747537612
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