Replacement OEM hybrid battery going bad after only 2+ years??

Discussion in 'Gen 2 Prius Main Forum' started by GreenMeanie, Sep 15, 2025.

Page 3 of 3
  1. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    27,093
    17,766
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    When you're talking gen 2, the actuator and the accumulator are built into the same single assembly you can buy, so it isn't very critical which word you use, you get the same part.

    In other generations, not so much.
     
    #41 ChapmanF, Sep 23, 2025 at 3:22 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    9,885
    6,092
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    It is called a "Brake Actuator" by Toyota and sometimes simply "Master Cylinder".

    I am sure he has heard of that.

    IMG_0076.jpeg IMG_0076.jpeg

    The part price a week ago shipped was $982. Somebody who works on Toyota and has their Techstream scanner could do it in four hours. You do the math.
     
    #42 rjparker, Sep 23, 2025 at 8:54 PM
  3. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    8,343
    4,256
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    I don't believe the brake actuator and master cylinder are the same thing.
     
    #43 dolj, Sep 23, 2025 at 10:52 PM
  4. rogerdpack

    rogerdpack Junior Member

    Joined:
    Apr 4, 2022
    79
    2
    0
    Location:
    Enoch, UT
    Vehicle:
    2007 Prius
    Model:
    N/A
    You could DIY it with an ebay (used part: $250) for...if you wanna have...fun...and get brake fluid everywhere :)
     
    #44 rogerdpack, Sep 25, 2025 at 1:50 PM
  5. GreenMeanie

    GreenMeanie Junior Member

    Joined:
    Mar 10, 2006
    41
    7
    0
    Location:
    San Diego, CA
    Vehicle:
    2006 Prius
    Oh no...I am equipped in no way, shape, or form to do my own brake job. I'm taking it in this week to have it done.

    Just curious, though: Does anyone know of other major things that might be about to go wrong aside from this and the hybrid battery? The decision to put the money into this fix is of course based on the hope that it's got some life left in it after this. And yes, crystal balls might be helpful.
     
    #45 GreenMeanie, Sep 29, 2025 at 6:18 PM
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    113,270
    51,539
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    that's pretty much it if you're not burning any oil, and no one steals the cat. unlikely, but the inverter can go, they are cheap salvage and easy install.
     
    #46 bisco, Sep 29, 2025 at 9:36 PM
(You must log in or sign up to post here.)
Page 3 of 3