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Upstream O2 connector

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Old 09-12-2018, 12:24 PM
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Default Upstream O2 connector

Is the upstream O2 connector male or female? I have found both options when searching on Rockauto.
 
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Old 09-12-2018, 01:18 PM
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The NTK shown on the RockAuto site.







The Grey colored connector is the upstream. Black downstream.

bob
 
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Old 09-12-2018, 05:48 PM
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Thanks!

What about this Denso unit? It costs substantially less.

https://www.rockauto.com/en/moreinfo.php?pk=1607546&cc=1425844

Also, is it safe to only replace the one that’s throwing a trouble code or should both be replaced?
 

Last edited by giandanielxk8; 09-12-2018 at 05:54 PM.
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Old 09-12-2018, 09:23 PM
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Originally Posted by giandanielxk8
Thanks!

What about this Denso unit? It costs substantially less.

https://www.rockauto.com/en/moreinfo...546&cc=1425844

Also, is it safe to only replace the one that’s throwing a trouble code or should both be replaced?
Define "safe" ? I would replace both just so I could call that part of the system DONE, Buts that's just me.

Z
 
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Old 09-12-2018, 09:29 PM
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I have replaced just the one on a couple of engines and there has been no need to do the other for 20-30K mi.
 
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Old 09-13-2018, 12:07 AM
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zray, normally I would agree with you, but I’m currently preparing to buy everything I need to rebuild the front suspension. Replacing both of those sensors would postpone the front suspension a few months.

Originally Posted by RJ237
I have replaced just the one on a couple of engines and there has been no need to do the other for 20-30K mi.
20-30k miles could easily be 5 years from now with how often I drive it.
 

Last edited by giandanielxk8; 09-13-2018 at 12:10 AM.
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Old 09-13-2018, 07:35 AM
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O2 sensors are HEAVILY monitored, so feel free to replace only the ones that fail. It is not really a "while you are there" situation. Replacing 2 sensors is just twice the work, and twice the $. Denso is fine.

Be triple sure you are ordering the right part. The upstream sensors are wideband, the downstream are narrowband. They work completely differently and are definitely not interchangeable. I had good luck removing my upstream sensor with a crowsfoot tool from the top.

O2 Tool

Best of luck, keep us posted.
 
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  #8  
Old 09-13-2018, 09:31 AM
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Originally Posted by fmertz
O2 sensors are HEAVILY monitored, so feel free to replace only the ones that fail. It is not really a "while you are there" situation. Replacing 2 sensors is just twice the work, and twice the $. Denso is fine.

Be triple sure you are ordering the right part. The upstream sensors are wideband, the downstream are narrowband. They work completely differently and are definitely not interchangeable. I had good luck removing my upstream sensor with a crowsfoot tool from the top.

O2 Tool

Best of luck, keep us posted.

Just to confirm, I want the tool to be ⅜ inch socket?
 
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Old 09-13-2018, 09:51 AM
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Originally Posted by giandanielxk8
Just to confirm, I want the tool to be ⅜ inch socket?
It's a bit confusing. 3/8 is the size of the square drive. The socket itself is 22mm or 7/8.
 
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Old 09-13-2018, 10:15 AM
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Originally Posted by fmertz
It's a bit confusing. 3/8 is the size of the square drive. The socket itself is 22mm or 7/8.
Alright. I'll just buy the one you linked to. I assume it's the correct one.
 
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