O2 sensors: left bank vs right bank... - Club Touareg Forums
Reply
 
Thread Tools Display Modes
post #1 of 12 Old 07-27-2017 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
O2 sensors: left bank vs right bank...

I changed out my O2 sensors tonight on the 3.6L. But... not sure I did it right. I bought the Bosch OE O2 sensors because they were only $100 each at RockAuto. Much cheaper than the OEM VW ones. And the directions looked so easy on Pelican Parts:

Pelican Technical Article - Volkswagen Touareg - Oxygen Sensor Replacement

Thought I'd have NO issues at all. I've replaced many O2 sensors on other cars. And the above directions said: "The sensors are specific to banks 1-3 and 4-6 and pre and post cats so make sure you order the right ones. The sensors are color coded and the fittings for the pre and post cats are different so it is hard to get them mixed up but the sensors wire length for banks 1-3 and 4-6 are different so pay attention to those."

So now here is my problem. The Bosch sensors are sold as Upstream Left sensor (1717 and Upstream Right (17277). On a regular everyday V6/V8 left and right is easy. On this VR6 engine where BOTH exhaust manifolds are on the same side of the engine how to you determine left and right??

This engine still has the original OEM sensors on it. One upstream sensor from the rearward exhaust manifold went to a brown connector. The other upstream connector from the exhaust manifold closest to the front of the vehicle goes to a black connector.

Now unfortunately the new Bosch sensors BOTH have black connectors on them. And BOTH have exactly the same harness length.

And that is why I'm confused.

Why does Bosch make 2 different part numbers for the primary sensors when they look identical?

Any help on this will be great.

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 07-27-2017 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
Correction to above on part numbers. Have no idea how the smiley with shades got in there. The part number is 17178 for the left.

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
post #3 of 12 Old 07-27-2017 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
After many hours of searching I finally found one reference to left/right on this engine. Pelican parts has exhaust manifold gaskets listed as cylinders 1-3 as "right" and cylinders 4-6 as "left".

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
Sponsored Links
Advertisement
 
post #4 of 12 Old 07-28-2017
Touareg Enthusiast
 
Touareg: 2011 V6 FSI
Join Date: Jun 2014
Location: Rochester, NY
Second Vehicle: Still looking
Posts: 239
Thanks: 0
Thanked 25 Times in 24 Posts
Glad I found your post, I have been contemplating this same question because our 11 VR6 need a new B2, S2 O2 sensor according to a recent scan with my Ross-Tech software and I have no idea which one that is but now I think it is most likely the Left Rear O2 sensor because that is the where the 4 - 6 exhaust manifold is.

Kinda makes sense if you look at engine there are 2 exhaust manifolds, left and right.
VWBob is offline  
post #5 of 12 Old 07-28-2017 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
Bank 1 exhaust is always where cylinder #1's exhaust comes out at.

So that would be left downstream/left post cat/left rear/B2S2. So many ways to say the same thing.

I was surprised that there isn't more info readily available on O2 sensors on these engines.


I did find some reference that the left/right came about as the VR6 engine was originally transversely mounted in VW front wheel drive cars. When in that position there is a left/right.

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
post #6 of 12 Old 02-23-2018
Touareg Enthusiast
 
Touareg: 2011 V6 FSI
Join Date: Jun 2014
Location: Rochester, NY
Second Vehicle: Still looking
Posts: 239
Thanks: 0
Thanked 25 Times in 24 Posts
77 K20 thank you for the information, if B1, S2 sensor is bad according to VCDS scan then I need to order Left/Rear O2 sensor 1K0-998-262-E VW P/N or Bosch P/N 16986

Of the 4 O2 sensors this is the hardest one to get to, go figure ! Still plenty of room to get to it.

BTW where are you in Montana ? My son went to MSU and now lives in Bozeman, a beautiful part of our country that we love visiting. Big Sky is definitely one of my top ski areas I like to ski !
VWBob is offline  
post #7 of 12 Old 02-23-2018 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
Quote:
Originally Posted by VWBob View Post
77 K20 thank you for the information, if B1, S2 sensor is bad according to VCDS scan then I need to order Left/Rear O2 sensor 1K0-998-262-E VW P/N or Bosch P/N 16986

Of the 4 O2 sensors this is the hardest one to get to, go figure ! Still plenty of room to get to it.

BTW where are you in Montana ? My son went to MSU and now lives in Bozeman, a beautiful part of our country that we love visiting. Big Sky is definitely one of my top ski areas I like to ski !
B1 is right. B2 is left.

So in your case B1, S2 is the right rear. (I did a quick edit here to remove some P/N info. Didn't realize you had a 2011...)

I'm in Whitefish, but grew up in the Frenchtown (Missoula) area. I almost went to MSU for electronics but instead went to Spokane. Bozeman is a nice area. Its grown a lot though.

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
post #8 of 12 Old 02-23-2018 Thread Starter
Junior Member
 
77 K20's Avatar
 
Touareg: 2007 V6
Join Date: Jun 2017
Location: Montana
Second Vehicle: Still looking
Posts: 78
Thanks: 11
Thanked 3 Times in 3 Posts
Garage
I think the P/N you'd want for the right rear is 1K0-998-262-T...


You sure you don't have any leaks in the exhaust to let air into the system and give you that lean code?

2007 Touareg V6
2014 Passat 5 speed manual
2003 Silverado 8.1L 6 speed manual
1977 Chevy K20 off road
77 K20 is offline  
post #9 of 12 Old 02-23-2018
Touareg Enthusiast
 
Touareg: 2011 V6 FSI
Join Date: Jun 2014
Location: Rochester, NY
Second Vehicle: Still looking
Posts: 239
Thanks: 0
Thanked 25 Times in 24 Posts
You are right, I semm to be easily confused with keeping it straight.
VWBob is offline  
post #10 of 12 Old 02-23-2018
Touareg Enthusiast
 
Touareg: 2011 V6 FSI
Join Date: Jun 2014
Location: Rochester, NY
Second Vehicle: Still looking
Posts: 239
Thanks: 0
Thanked 25 Times in 24 Posts
Quote:
Originally Posted by 77 K20 View Post
I think the P/N you'd want for the right rear is 1K0-998-262-T...


You sure you don't have any leaks in the exhaust to let air into the system and give you that lean code?
I will check, thanks again

Been traveling to Bozeman for almost 20 years now for my work, it has grown a ton in that time !

Whitefish Mountain is on my short list for ski areas I need to go to, if I'm lucky maybe I can experience some "Cold Smoke" skiing there
VWBob is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Club Touareg Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










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



Posting Rules  
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are Off

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

VW Touareg News Delivered to your Email!

Stay up-to-date with Touareg news in your inbox.

unsusbcribe at anytime with one click

Close [X]