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What coolant/fluid to change?

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by dhman2006, Feb 11, 2018.

  1. dhman2006

    dhman2006 Member

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    My 2011 is getting close to 75K miles and I'm thinking about changing out the coolants. So far I've got transmission fluid, engine, and inverter coolants on my list. Is there anything else that I need to change? If not at 75K, at 100K?
     
    #1 dhman2006, Feb 11, 2018
  2. FuelMiser

    FuelMiser Senior Member

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    Brake fluid? You could check the reservoir for cloudy or darker fluid. It should be clear and light in color.
     
    #2 FuelMiser, Feb 12, 2018
  3. douglasjre

    douglasjre Senior Member

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    HOAT. If you have too much water you will get a startup knock. No joke
     
    #3 douglasjre, Feb 22, 2018
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    Toyota intended many of them to go for 120,000 miles.
    I would hold off the coolants until then, unless there is a reason.
    Brake fluid can be tested, I would test it before even reading up on the tricky ways to change it. (There is no simple way)
    amazon.com/Automotive-Diagnostic-Testing-Calibrated-Indicator/dp/B01EOD7INK
    I would consider draining and refilling the ATF WS in the transaxle every 90,000 miles
     
    #4 JimboPalmer, Feb 22, 2018
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  5. NutzAboutBolts

    NutzAboutBolts Senior Member

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    Coolant last to 120k miles, 75k is way too early. I would do the transmission fluids and check the brake fluids.
     
    #5 NutzAboutBolts, Feb 24, 2018
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  6. Bay Stater

    Bay Stater Senior Member

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    +1 on the ATF! I did mine today at 120K for the second time. First time was at 50K. Owned the car since 40K.
     
    #6 Bay Stater, Feb 25, 2018
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