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Spark Plug code for 2011 Prius

Discussion in 'Gen 3 Prius Technical Discussion' started by imdavid7997, Aug 4, 2024 at 11:40 AM.

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  1. imdavid7997

    imdavid7997 New Member

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    2011 Prius
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    Hello everyone, i'm looking to replace spark plugs for my car. Base on the manual, I should buy
    SC20HR11, however, I see many people say now we should use SK16R11 instead. Is it true ? Should I stick to the old code or new code ? Thank you beforehand for your response!
     

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    #1 imdavid7997, Aug 4, 2024 at 11:40 AM
  2. Eddie25

    Eddie25 Active Member

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    From a brief check it looks like SK16R11 doesn't even have the correct thread size at 14 mm. SC20HR11 has a 12mm thread size. So between those two I'd definitely go SC20HR11. I feel like you are thinking of something else (perhaps SC16HR11, don't quote me on that) that people were switching to based on a TSB or something. In that case, I would feel OK with either one.

    The absolute main thing to remember is to buy them from a trusted source. Dealer or parts store only. The ones on eBay and Amazon (and who knows how many other sources) are counterfeits.
     
    #2 Eddie25, Aug 4, 2024 at 4:41 PM
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