Oxygen sensor - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 09-10-2004, 12:11 PM
2nd Gear Member
 
mech9T8's Avatar
 
Join Date: Jul 2004
Location: Toronto, Ontario, Canada
Posts: 358
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mech9T8 is an unknown quantity at this point
(Thread Starter)
So my check engine light goes off and the dealer says I need to replace the O2 sensor. They wanted about $350 CAD.
So I thought I would do it myself and while I was at it I would replace all 4. But after seeing what one of them costs I decided not to.
What I need to find out is which one is faulty. The dealer told me that it is the sensor from bank #2. So are these the ones before or after the cat? Anyone know? Is there a way to test them? I found out that all 4 sensors are identical but then I also found that there are some with short wires and some with longer wires. So which one do I get?
I thought that if I get the one with the longer wire I would be safe because it would reach to the connector regardless.
Any help would be much appreciated.

<img src='http://www.geocities.com/royb9t8/MY_BMW_2.jpg' border='0' alt='user posted image' />

<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>
mech9T8 is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 09-10-2004, 12:29 PM
n00b
 
Sk1d's Avatar
 
Join Date: Sep 2004
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sk1d is an unknown quantity at this point
I'm assumin u've either got a straight six or a v8 in ur Beemer. Bank 2 meaning one side of the exhaust system or the other. If u can speak 2 ur mechanic again n ask him if its the upstream or downstream sensor ur sorted. After that its a DIY job...

Me-Chanic
Sk1d is offline  
#3 (permalink) Old 09-10-2004, 01:05 PM
2nd Gear Member
 
mech9T8's Avatar
 
Join Date: Jul 2004
Location: Toronto, Ontario, Canada
Posts: 358
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mech9T8 is an unknown quantity at this point
(Thread Starter)
I have a 96 328.
I don't think the dealer will be that willing to give up the info.
But I can always try.

<img src='http://www.geocities.com/royb9t8/MY_BMW_2.jpg' border='0' alt='user posted image' />

<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>
mech9T8 is offline  
#4 (permalink) Old 09-10-2004, 01:37 PM
/Banned
 
Join Date: Jun 2004
Location: nap town
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
okczy21 is an unknown quantity at this point
if you get an aftermarket exhaust system doesnt it just do away the oxygen sensors anyways, why are they there?
okczy21 is offline  
#5 (permalink) Old 09-10-2004, 02:44 PM
n00b
 
Sk1d's Avatar
 
Join Date: Sep 2004
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sk1d is an unknown quantity at this point
See wat u can do bout gettin sum more info off em... might get lucky...

Good luck...

Me-Chanic
Sk1d is offline  
#6 (permalink) Old 09-10-2004, 05:24 PM
Keep it Copacetic
 
///M Power's Avatar
 
Join Date: Feb 2004
Location: St. Louis, MO ||| Los Angeles, CA
Posts: 9,481
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute
Send a message via AIM to ///M Power
4444444444 O2 sensors? hat's a new one to me. If u got an i6 i didnt think there wud ever be more than 2. hmmmmmm

They are easy to change if u got a u wrench of some sort. You need to give us a year adn a model. And $350 is wayyyyy too $$$$$$$$$ even for canadia

O2 sensors sense the amount of chemicals in ur exhaust waste and thus use a computer to adjust the fuel injection system to provide better gas mileage. YOU NEED IT.


1995 BMW M3 Turbo - Dakar/Black
///M Power is offline  
#7 (permalink) Old 09-11-2004, 08:32 AM
2nd Gear Member
 
mech9T8's Avatar
 
Join Date: Jul 2004
Location: Toronto, Ontario, Canada
Posts: 358
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mech9T8 is an unknown quantity at this point
(Thread Starter)
OK the dealer told me that bank #2 is the right side of the car but I still don't know if it's the one in front or behind the cat.
I still need to figure out how to tell if the sensor is bad.

<img src='http://www.geocities.com/royb9t8/MY_BMW_2.jpg' border='0' alt='user posted image' />

<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>
mech9T8 is offline  
#8 (permalink) Old 09-11-2004, 10:33 AM
/Banned
 
Join Date: Jun 2004
Location: nap town
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
okczy21 is an unknown quantity at this point
so do aftermarket exhausts not use the o2 sensors? or do they?
okczy21 is offline  
#9 (permalink) Old 09-11-2004, 11:48 AM
n00b
 
Sk1d's Avatar
 
Join Date: Sep 2004
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sk1d is an unknown quantity at this point
Okay, this is where it gets a bit more tricky... If u can get ur hands on a multi-meter u need to check the voltage across 2 of the sensor wires with the sensor still plugged in and the engine warm and running. Not sure wat color the wires will be but u can easily check em all til u get the right 1's. When u probe the 2 correct wires ur meter should show the sensor's voltage switching between about 100 and 700 mV, if the sensor's working correctly...

Hope sum of this helps out...

okczy21, if u bought a cat back system the oxy sensors stay in the system in the original cat' pipe. Dunno wat happens to em if u bought a de-cat pipe tho, sorry...

Sorry guys, tha shoulda been voltage not resistance...

Me-Chanic
Sk1d is offline  
#10 (permalink) Old 09-11-2004, 12:57 PM
Gear Member
 
BeachBunny's Avatar
 
Join Date: May 2004
Location: San Diego, CA
Posts: 3,805
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute BeachBunny has a reputation beyond repute
He's asking $350?! This is just something I remember hearing... but can't you replace your oxy sensors for like 85 bucks?
BeachBunny is offline  
#11 (permalink) Old 09-12-2004, 12:18 PM
1st Gear Member
 
Join Date: Jul 2004
Location: Montreal, Quebec
Posts: 150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Henri is an unknown quantity at this point
Ok my dealer told me the same thing on my 318i... I refuse to let them change it since I got no Check Engine light lighted??!!!

I'm from Canada too... the 2 sensors cost 178$ and 75$. The cable is longer, yeah, but the connector is different also... you can't take 2 times the 75$ sensor.

If you can do an oil change all by yourself, you should be able to change those.
http://www.geocities.com/e36rulz/DIY.html

I got a question for you... If I ever realize they were right (assuming I should change these parts), are BMW original oxygen sensor better than Bosch oxygen sensor??

Thanks a lot!
Henri
Henri is offline  
#12 (permalink) Old 09-13-2004, 11:36 AM
2nd Gear Member
 
mech9T8's Avatar
 
Join Date: Jul 2004
Location: Toronto, Ontario, Canada
Posts: 358
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mech9T8 is an unknown quantity at this point
(Thread Starter)
So I crawled under my car this weekend and found all the sensors.
I was able to access the 2 at the rear and I tried to check them for voltage output with a digital multimeter but I didn't get anything conclusive. I have to try the ones at the front now. And this time I'll try to check the resistance too (thanks for the input SK1D). But one thing I noticed is that they are not going to be easy to remove. Wish me luck.

Henri, from my research I believe that the sensors from BMW are Bosch sensors. I've looked around and believe it or not the dealer has the best prices on a new sensor...$178 CAD. You can try to get a used one to if you want. They are cheaper but won't last as long.

<img src='http://www.geocities.com/royb9t8/MY_BMW_2.jpg' border='0' alt='user posted image' />

<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>
mech9T8 is offline  
#13 (permalink) Old 09-13-2004, 01:34 PM
n00b
 
Sk1d's Avatar
 
Join Date: Sep 2004
Posts: 41
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sk1d is an unknown quantity at this point
Quote:
Okay, this is where it gets a bit more tricky...
Sorry guys, tha shoulda been voltage not resistance...

Me-Chanic
Sk1d is offline  
#14 (permalink) Old 09-14-2004, 04:41 PM
1st Gear Member
 
Join Date: Jul 2004
Location: Montreal, Quebec
Posts: 150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Henri is an unknown quantity at this point
Yeah... that's the 1st time I see cheaper parts at a dealership lol

Anyway, I presume I don't have to change them 'till the Check Engine light is on... right ?

Thanks
Henri
Henri is offline  
#15 (permalink) Old 09-14-2004, 04:59 PM
2nd Gear Member
 
mech9T8's Avatar
 
Join Date: Jul 2004
Location: Toronto, Ontario, Canada
Posts: 358
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
mech9T8 is an unknown quantity at this point
(Thread Starter)
Yep.
I read that you should change them after 60,000 miles to ensure good engine performance but I'd wait till you see that check engine light.
Ultimately the choice is yours.

<img src='http://www.geocities.com/royb9t8/MY_BMW_2.jpg' border='0' alt='user posted image' />

<span style='color:blue'>My ass may be dumb, but I ain't no dumb ass!</span>
mech9T8 is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > 3-Series (E36)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Check Engine Light came on today camnipotent 3-Series (E36) 24 08-08-2014 05:20 AM
2000 528i 'oxygen sensor adaptation limit' sreitshamer 5-Series (E12,E28, E34, E39, E60) 8 02-14-2012 05:15 PM
Bosch to siemens oxygen sensor swap (inc pics) KILOCHARLIE 3-Series (E36) 9 10-01-2009 07:10 AM
New Car - Few Problems, Any Help Appreciated. Sagan 3-Series (E36) 8 05-16-2004 09:28 PM

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome