Anyone make a Gen 5 engine heater?

Discussion in 'Gen 5 Prius Technical Discussion' started by broderp, Dec 2, 2025 at 4:31 PM.

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  1. broderp

    broderp New Member

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    I've seen engine heaters before, and part of the wear and tear on our engines is that the hybrids don't always get up to full temp due to how efficient they can be. This leads to two issues:
    • Wasting gas heating up on cold mornings.
    • Condensation build up in the engine.
    With Winter here and my Prius as my daily driver I want to help it heat up quicker, save some gas and get warmer on my way to work - not that the heated seats and steering wheel aren't a HUGE help!

    Cheers.
     
    #1 broderp, Dec 2, 2025 at 4:31 PM
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    There's a block heater.

    That said, my 3rd gen's block heater was subject to a recall, due to fire hazard I think, so I had that done. Old one used to warm the coolant hoses up markedly, in a couple of hours. New one, with 3~4 hours plugged in, is mediocre warmish. Apparently watts went from 400 to 200. :confused:
     
    #2 Mendel Leisk, Dec 2, 2025 at 9:42 PM
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  3. KMO

    KMO Senior Member

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    I've got a DEFA 300W oil pan heater - they're the leading brand around here, but it's not clear to me how readily available they are in North America.

    Oh, and it's 230V - forgot the voltage thing. Hmm. Maybe not the best suggestion for you, but info might be useful to someone.

    https://www.defa.com/electrical-preheating/engine-heaters/

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    And I've just noticed that they only list the plug-in G5, which makes sense as that's the only version in Europe. But should be compatible with the non-plug-in. Same part fits various UX, C-HR and Corolla and RAV4 with the same engine.

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    #3 KMO, Dec 3, 2025 at 1:16 AM
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  4. VelvetFoot

    VelvetFoot Active Member

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    Bolts on. Not invasive. Nice.
     
    #4 VelvetFoot, Dec 3, 2025 at 7:55 AM
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