2000 Mazda Millenia catalytic converter replacement

[kindasimpl]

Our 2000 is giving off codes PO300 and PO431. From my research it indicates the catalytic converter as the O2 sensor would not trigger the 431 code also.

I found several on-line as a replacement but don't know which to choose. Also can a "small town" mechanic do the job or do I need to take it into the city? Is there anything else we should go ahead and replace at the same time; Oxygen Sensor, etc.?

Runs great, no other complaints other than a tiny oil leak that the dealer can't locate. They have put dye in the oil change every time for the past year and still can't trace the leak.

[Bu11dogg2]

If you have 70k or less just replace the cat. MOre then likey the 02 sensor went too, so that will need replacement.

If you have 70k + I would do plugs and wires too.

You could probably do both yourslef witha jack, a wrench and some PB blaster.

If you are not mechanically inclined I would take it to a trust worthy mechanic.

It's an easy fix ;)

I'm not 100% sure.... but the catalytic converter might be under Mazda warranty ;)

[NCZ13]

no. the cat is considered a general wear and tear item.

eventually cats go bad and they need to be replaced.

[Eni6mA18]

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