New Rotors with Brake Job?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Philtration, Oct 7, 2025.

  1. BiomedO1

    BiomedO1 Senior Member

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    Rebuilt or new calipers are $100+ per unit. They should flush out the braking system with new DOT3 brake fluid while they're at it and manually adjust the rear shoes. The difference in braking performance is astounding, when all brake fluid is replaced, because you really don't notice the very slow denigration of braking power over the years. It makes a noticeable difference in larger, heavier cars.
     
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    I'd leave them be. I've never needed to replace a brake caliper, did have one rotor failure, other'n that never touched them either. Maybe more road salt in your area though.

    Do a brake fluid replacement sometime, if you haven't. Toyota USA says nothing about brake fluid replacement; Toyota Canada says tri-yearly or 48k kms (30k miles), whichever comes first.

    I believe for gen 2 Techstream is a must-have for brake fluid replacement? Dealership would be safest.
     

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  3. priumium

    priumium Junior Member

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    Make sure those pads and the glide pins are moving smoothly. Calipers should hold if well greased with silicone and rotors you can possibly ignore, unless warped (very uncommon) or have a very hard crust at the top.

    Got a great tip from a Swedish rust lord to coat any rust prone parts of the rotor with a thin layer of ceramic grease. Looks better aswell. This trick has prevented new rust on those surfaces that the pads do not touch for years for me!

    Note, it’s not officially condoned…

    I personally prefer TWR painted rotors (Toyota OEs are also painted) since they don’t rust as easily in any northern hemisphere scenario - if you wish to replace them.
     
    #23 priumium, Oct 19, 2025 at 8:52 AM
    Last edited: Oct 19, 2025 at 8:57 AM
  4. pasadena_commut

    pasadena_commut Senior Member

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    Sure, change the fluid, mostly to avoid corrosion, but it won't make any difference in normal braking.

    Recently changed the brake fluid on our 2007 and our 1998 Accord and the brakes feel the same in both. New and old fluid, and water too, are basically incompressible, and that is 99.9% of what brake fluid does. The only way that it should matter is if the old fluid is heavily contaminated with water and then it would boil at a lower temperature than new DOT3 in very heavy usage.