Is Prius Gen 4 more reliable than Gen 3?

Discussion in 'Gen 3 Prius Main Forum' started by Mamalucy, Oct 20, 2025 at 2:41 AM.

  1. Mamalucy

    Mamalucy Junior Member

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    Original owner, Bought 2010 early Gen 3 having some problems. 122,500 miles, wondering if better to get a newer Prius Gen 4. Don't care for the newest model.
    Any thoughts? Thanks!
     
  2. PriusCamper

    PriusCamper Senior Member

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    Yes

    But problems are limited to head gasket and piston rings...

    You can put a Gen 4 engine in a Gen 3 Prius and solve everything.
     
  3. Tombukt2

    Tombukt2 Senior Member

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    Seems like a lot of hybrids are all of a sudden coming down the pike it's going to be interesting for sho. Even Lamborghini is going all hybrid.if I can figure out battery situation for gen1 volt it's one the better cars on planet . Easy to find cheap.
     
  4. ASRDogman

    ASRDogman Senior Member

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    Why would you get a newer car? What's wrong with the one you have now?
    And you don't like the way it looks, WHY would you spend money on it?

    If your car is paid for, and you like it, WHY get rid of it?

     
  5. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Not sure about that. Getting 4th gen EGR to work in gen 3 is not easy, and afterwards many experienced overheat issues, resorted to modding thermostat.

    If our 2010 ever gets to that juncture, say failed head gasket and runaway oil consumption (which I suspect is pure cargo cult now…), the shopping list would be (gen 3) short block, engine overhaul gasket kit (Toyota, including head gasket), and replaced head bolts.

    And continue to clean the (3rd gen) EGR system periodically.