O2 sensors

[mikehoward2]

Replacing O2 sensors, I know there is an upstream and downstream but can't find downstream on Oriley or rock auto. Do I use upstream for both?

 

[JPNinPA]

First buy ONLY. NGK/NTK
Other brands commonly have issues or lead to issues.

What lead you to replacing O2 sensors?

 

[mikehoward2]

First buy ONLY. NGK/NTK
Other brands commonly have issues or lead to issues.

What lead you to replacing O2 sensors?

Check engine light, read code. Also loosing some power from time to time hoping just bad sensors

 

[mikehoward2]

And how many O2 sensors in a 1995 4cyl. And is there a different sensor for downstream?

 

[JPNinPA]

Check engine light, read code. Also loosing some power from time to time hoping just bad sensors

And how many O2 sensors in a 1995 4cyl. And is there a different sensor for downstream?

What was the code? #?


On the 1995 2.5 cyl there is only one.
Did you initially crawl under here and look?
Oxygen Sensor Part No. Location Note Photo
Oxygen Sensor. 23023. Pre-Cat (ONLY) n/a

 

[Ken72]

I have a stupid question.. Are all the sensors the same? I know there are 4 different ones for the 2003 tj X. do i specifically have to purchase a one upstream one downstream.... etc

or can buy just on type..

 

[JPNinPA]

I have a stupid question.. Are all the sensors the same? I know there are 4 different ones for the 2003 tj X. do i specifically have to purchase a one upstream one downstream.... etc or can buy just on type..

Absolutely!! They each have a different part number. Besides the wire length I believe upstream are internally different from downstream. Only by IEM or NTK that is OEM based.

PS the only stupid questions are the ones not asked.

 

[Ken72]

Thank you