Question about 2004 Infiniti QX4

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How many catalitic converters are on the 2001 infiniti QX4

My 2001 infiniti QX4 has 86,000 miles and the computer readout shows the cats are the problem . how many cats are in system and can i change them myself?

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  • AndrewReam Mar 12, 2009

    I need to replace the O2 sensor on my 2001 QX4 but I can't seem to find a "fix it yourself" website or anyone that knows of manuals and such. What all is needed, how difficult is it and is it worth doing myself vs. a mechanic?

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There are only to Catalysts monitored by the ECM. There is a wide pipe near the front of the exhaust system that looks like it houses a catalyst, but it doesn't. Look for the rear O2 sensor, that is where the catalyst is. If the bolts that hold it on are not badly rusted, and depending on your mechanical aptitude you could replace them, otherwise take it to a shop. Have you checked the warranty coverage with the dealership?

Posted on Nov 26, 2008

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