Gen3 Prius Catalytic Converter Parts

Discussion in 'Gen 3 Prius Main Forum' started by richard203, Aug 17, 2025 at 10:04 PM.

  1. richard203

    richard203 Member

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    2008 Prius
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    ----USA----
    Hi I'm planning to buy a used junkyard oem gen3 prius cat for my prius. I was wondering how can I tell if its oem or aftermarket?

    is this the correct o2 parts I see the review some people say it dont work for gen3 prius?

    downsteam o2 - DENSO 2344400
    upstream o2 - DENSO 234-9301

    is there any aftermarket gasket and bolts for the cat or I have to get oem?
     
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Vehicle:
    2012 Prius v wagon
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    Three
    The oem cat includes the exhaust heat recirculation system and bolts in.

    IMG_9410.jpeg

    If it is aftermarket it will be just the front two cats crudely welded into the factory exhaust recirculation system.

    IMG_9411.jpeg

    Most likely you can reuse your bolts and gaskets or the junkyard parts.

    A junkyard assembly will have the sensors as well. The only caution on any of this is if the engine(s) were oil burners the cats may be fouled.