Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

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

Reply
 
Thread Tools Display Modes
  #1  
Old 02-25-2014, 09:17 PM
AJR1982 AJR1982 is online now
Officially Welcomed to the 'Fest
Location: Spokane
 
Join Date: Jan 2013
Posts: 176
Mein Auto: 525i 2002 & x5 2002
Just to vent

I have been trying to put some spacers into my post cat O2 sensors and they are being a monkeys uncle. First I can't find the connectors so I can turn them, no such luck. Then I got anti seize all over the sensor itself. I've got a hole the size of a tennis ball to fit my hand through.

Someone please tell me there is an easier way. I've got the DIY on the 3 series, but it's nowhere near the same thing. Also do I need to put a new sensor in now that it has anti seize all over it?

Sent from BimmerApp mobile app
Reply With Quote
Ads by Google
  #2  
Old 02-25-2014, 09:35 PM
edjack edjack is online now
Officially Welcomed to the 'Fest
Location: San Jose, CA
 
Join Date: May 2007
Posts: 8,791
Mein Auto: '97 540i 6 speed
Yes, it's contaminated. Why are you attempting to install spacers?

The connector is inside a plastic box at the end of the sensor cable.
__________________


Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
Reply With Quote
  #3  
Old 02-26-2014, 10:24 AM
sactown540 sactown540 is offline
Registered User
Location: sacramento
 
Join Date: Mar 2013
Posts: 29
Mein Auto: 540i
Im lost...why would you put spacers into your post cat 02 sensors??
Is this to fix a sensor problem or to improve something?
__________________
2001 540i auto
Reply With Quote
  #4  
Old 02-26-2014, 10:28 AM
edjack edjack is online now
Officially Welcomed to the 'Fest
Location: San Jose, CA
 
Join Date: May 2007
Posts: 8,791
Mein Auto: '97 540i 6 speed
I suspect he's removed the cats and is now getting the post-cat sensor code.
__________________


Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
Reply With Quote
  #5  
Old 02-26-2014, 10:32 AM
sactown540 sactown540 is offline
Registered User
Location: sacramento
 
Join Date: Mar 2013
Posts: 29
Mein Auto: 540i
Why would you remove that cats? What would that improve?
weight?
Back pressure?
__________________
2001 540i auto
Reply With Quote
  #6  
Old 02-26-2014, 11:19 AM
AJR1982 AJR1982 is online now
Officially Welcomed to the 'Fest
Location: Spokane
 
Join Date: Jan 2013
Posts: 176
Mein Auto: 525i 2002 & x5 2002
I didn't remove the cats. I'm just getting P0420 and P0430 codes.

Here's what happened. Last fall I went on vacation. I knew gas prices were going down so I left my car with a little gas for a few weeks. (believe me when I say I knew this was a no-no when I did it so feel free to mock me). When I got back I started off on the freeway to go to Costco for some gas and much needed groceries. A few blocks into the venture It sucked up some water. It spit spat and farted. I OBDII'd the codes and found a crap load which I expected, cleared it out and the problem went away for a month. When P0420 came back on figured I would have someone take a look at it scheduled an appointment. Then it went out on its own and stayed off so I cancelled the appointment. Later that week it came back on with P0430/20. It went on and off for a while until I posted in another link here. Someone mentioned spacers but never answered my questions about them. So I went over to mechanic and he said the same thing. Get spacers! so that's what I did.

To answer your question sac town I'm a OEM parts kind of guy but I would love to get rid of my cats. Restrictions in pipes decreases back pressure and inhibits scavenging.

Last edited by AJR1982; 02-26-2014 at 11:30 AM.
Reply With Quote
  #7  
Old 02-26-2014, 11:34 AM
sactown540 sactown540 is offline
Registered User
Location: sacramento
 
Join Date: Mar 2013
Posts: 29
Mein Auto: 540i
Interesting....what do the spacers do? Allow it to vent before the sensor?
Im guessing you dont want to replace the cats since I heard they're super expensive..
__________________
2001 540i auto
Reply With Quote
  #8  
Old 02-26-2014, 11:50 AM
AJR1982 AJR1982 is online now
Officially Welcomed to the 'Fest
Location: Spokane
 
Join Date: Jan 2013
Posts: 176
Mein Auto: 525i 2002 & x5 2002
They just move them partially out of the exhaust stream. I've heard BMW sensors throw codes when the cat is around 95%. There is no need to replace a cat at that point.

Sent from BimmerApp mobile app
Reply With Quote
  #9  
Old 02-26-2014, 04:10 PM
poolman poolman is offline
Officially Welcomed to the 'Fest
Location: martinsville va
 
Join Date: Nov 2005
Posts: 3,798
Mein Auto: 525i station wagon
Get them out of the air stream will fool the OBC and make it think all is A OK
Reply With Quote
  #10  
Old 02-26-2014, 04:13 PM
AJR1982 AJR1982 is online now
Officially Welcomed to the 'Fest
Location: Spokane
 
Join Date: Jan 2013
Posts: 176
Mein Auto: 525i 2002 & x5 2002
I'm OK with fooling sensors.

Sent from BimmerApp mobile app
Reply With Quote
  #11  
Old 02-26-2014, 09:22 PM
Burning2nd Burning2nd is offline
Under the lift arms
Location: Under the lift arms
 
Join Date: Aug 2010
Posts: 4,099
Mein Auto: E39 540, E36 328is, E83x3
OR just reprom the ecm.. and tell it that these arent the o2's you were looking for


in fairness you should fix the problem.. not rigg it..
but if rigging is the way you must go.. at least do it right.. Recode the o2 single
__________________
Specializing In BMW, Audi, Mercedes Benz ,Volkswagen, Volvo
Reply With Quote
  #12  
Old 02-27-2014, 11:34 AM
AJR1982 AJR1982 is online now
Officially Welcomed to the 'Fest
Location: Spokane
 
Join Date: Jan 2013
Posts: 176
Mein Auto: 525i 2002 & x5 2002
I'm not sure what you mean by recode the o2 single...
Reply With Quote
  #13  
Old 02-27-2014, 02:21 PM
Burning2nd Burning2nd is offline
Under the lift arms
Location: Under the lift arms
 
Join Date: Aug 2010
Posts: 4,099
Mein Auto: E39 540, E36 328is, E83x3
search 02 senor delete on google

search eprom
__________________
Specializing In BMW, Audi, Mercedes Benz ,Volkswagen, Volvo
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 10:02 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms