Denso SC20HR11 spark plugs

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by AzusaPrius, Jul 12, 2020.

  1. AzusaPrius

    AzusaPrius Member

    Joined:
    May 27, 2020
    408
    114
    0
    Location:
    Apple Valley
    Vehicle:
    2010 Prius
    Model:
    III
    These are what I removed out of my prius when I swapped out the plugs.

    Assuming they are original and since there is no service history by toyota having changed them, I will say these have 160k* miles on them as that was around the mileage when I took them out.

    They are said to last 100k.
     
  2. AzusaPrius

    AzusaPrius Member

    Joined:
    May 27, 2020
    408
    114
    0
    Location:
    Apple Valley
    Vehicle:
    2010 Prius
    Model:
    III
    Here is what they look like. 20200712_113900.jpeg
     
    jzchen likes this.
  3. Tande

    Tande Active Member

    Joined:
    Jan 29, 2006
    457
    259
    0
    Location:
    Mich.
    Vehicle:
    2017 Prius
    Model:
    II
    Send them to me........I'll get another 100,000 out of them! ......:)
     
    2012 Prius v wagon 3 likes this.
  4. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
    40,129
    28,674
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Maintenance schedule says 120k miles (or 12 years). Too, the recommended replacement Denso plug is now slightly hotter: in the part number the 20 became 16.
     
    AzusaPrius likes this.
  5. High Mileage

    High Mileage Member

    Joined:
    Nov 25, 2016
    96
    162
    0
    Location:
    California
    Vehicle:
    2018 Prius Prime
    Model:
    Prime Advanced
    I was able to get 192K out of my first set of plugs on my 2010 before I started getting a misfire under load. I purchased a new set of the Denso plugs from Ebay or Amazon. (Its been long enough that I forget which) They came in boxes that looked authentic and the plugs looked authentic to my eyes anyway. The second set lasted only 70K miles before I started getting a misfire again under load. When I pulled them out the center electrode was almost gone. I believe they were not authentic Denso plugs. Your plugs look like they have been around the block a few times but not bad for 160K miles.
     
  6. AzusaPrius

    AzusaPrius Member

    Joined:
    May 27, 2020
    408
    114
    0
    Location:
    Apple Valley
    Vehicle:
    2010 Prius
    Model:
    III
    I always replace the plugs after buying a car but yea they dont look bad and I will keep them as back up.
     
  7. johnHRP

    johnHRP Junior Member

    Joined:
    Aug 6, 2014
    38
    11
    0
    Location:
    tally, fl
    Vehicle:
    2008 Prius
    Model:
    ----USA----
    In USA it is 120k miles schedule, in Europe 60k miles since European not get used to long reliability of Toyota cars. European cars broke down much easier. After checking mine at 60k miles, I put them back and check it again at 100k miles, it is still really good.
     
Loading...