Post and pre cat oxygen/o2 sensors the same?

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Nov 16, 2011 | 12:43 PM

Don Nguyen

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From: Irvine, CA

Post and pre cat oxygen/o2 sensors the same?

I have an extra set of O2 sensors, but I can not remember if they were post or pre cat o2 sensors. I was wondering if they are the same part number/sensor?

Nov 16, 2011 | 12:51 PM

OnyxY2KSS

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The fronts should have a square pigtail and the rears should have a wider rectangular pigtail.

Nov 16, 2011 | 07:06 PM

skopers3

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You sure? I'd almost swear after I deleted my cats I used a rear to replace a front one that went bad it worked jsut fine...

Nov 16, 2011 | 07:06 PM

Don Nguyen

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Kragen is showing the same part numbers for both o2 sensors being the same, so I will assume that they are.

-Don

Nov 16, 2011 | 08:42 PM

senicalj4579

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The part #s are different but they are totally the same except the wire length.

Nov 16, 2011 | 08:47 PM

LS6427

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Sensors and plugs are IDENTICAL....you can use any sensor in any position.....different wire lengths are why they have different part numbers. So measure and buy whatever sensor or brand you like.

I cut my rear plugs off and spliced them into my front wiring harness because my front plugs cracked. They are identical.

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