Best Spark Plug Replacement for Gen4?

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Mavi, Feb 20, 2018.

  1. Mendel Leisk

    Mendel Leisk Sand Pounder

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    The screen grabs I posted up the page are from the US Owner's Manual lol.

    Addendum: search the pdf version for "denso", is easiest way to find.
     
    #41 Mendel Leisk, Jul 16, 2019
    Last edited: Jul 16, 2019
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  2. Poa

    Poa Junior Member

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    It's weird that napa site says it does not fit 2016 prius
     
  3. amos

    amos Active Member

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    bought them at ebay, order was showing clearly gen4 plugs, manual is showing old plugs p/n, going to do a full maintenance this weekend , lets see what will be the mpg, car already passed the 100k, hoping replacing those plugs wont require disassembly of all wiper mechanism like gen3, has anyone done that so far without that crawl bar mess?
     
    #43 amos, Jul 18, 2019
    Last edited: Jul 18, 2019
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  4. Prodigyplace

    Prodigyplace Senior Member

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    Yesterday I did not see the owners manual images in your post. One would expect maintenance items be in the Maintenance Manual.
     
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  5. Mendel Leisk

    Mendel Leisk Sand Pounder

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    The plugs you have are the revised spec 3rd gen plug, slightly hotter. I would use the plug recommended in the 4th gen Owner's Manual. What you have "may" be compatible, but I would take the Owner's Manual recommendation, not eBay.
     
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  6. IamPrius

    IamPrius Junior Member

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    It has been 15 months since the last reply. Has anyone used any other spark plugs than the FC16HR-C9? I'm fixen to hit 240,000 and will be changing spark plugs for the second time. I replaced with the above plugs at 120,000 as recommended by Toyota. The OE plugs are $13 and up.
     
  7. alanclarkeau

    alanclarkeau Senior Member

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    They work. You could try something else cheaper - and then if they don't work, you end up paying $13 as well. And - if they damage the ignition module or worse ...
     
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  8. IamPrius

    IamPrius Junior Member

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    Absolutely worthless reply. You have not added anything constructive at all.
     
  9. alanclarkeau

    alanclarkeau Senior Member

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