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O2 sensor/s ?.??

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Old 04-20-2012, 02:06 PM
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Default O2 sensor/s ?.??

Hey guys long time listener first time caller..

91 xj 4.0 has only 1 o2 right...? Located between headers and cat?

Thanks
Old 04-20-2012, 02:18 PM
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Originally Posted by GoGoGadgetXJ
Hey guys long time listener first time caller..

91 xj 4.0 has only 1 o2 right...? Located between headers and cat?

Thanks
depends on the year, some have pre cat and one after the cat. my 99 has 2-o2 sensors
Old 04-20-2012, 02:32 PM
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Yup only 1 o2
Old 04-20-2012, 06:34 PM
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On a 91, only one.

If you replace, I suggest using NTK brand replacement. That is what Jeep installed from the factory and is the best choice for 91-01.
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