1. Attachments are working again! Check out this thread for more details and to report any other bugs.

Flushing brake fluid

Discussion in 'Generation 1 Prius Discussion' started by The Mighty Mutt, Aug 31, 2024 at 7:33 PM.

  1. The Mighty Mutt

    The Mighty Mutt Junior Member

    Joined:
    Mar 24, 2023
    10
    3
    0
    Location:
    Flagstaff, AZ - USA
    Vehicle:
    2002 Prius
    Model:
    N/A
    My '02 Prius is up above 225k miles, and the time has come to flush the brake fluid, and I plan on doing this at home without any of the special tools (other than a hose w/ a one-way valve). She's been on a DOT4 diet since at least 2010. And I believe this is the first total flush. I would like to change her over to DOT5. Is this okay to do without replacing the parts? I know the various versions shouldn't be mixed, and I'm not sure if flushing the system ACTUALLY removes/displaces all of the old stuff. Should I just be happy with 5.1, or stick with 4?
     
    #1 The Mighty Mutt, Aug 31, 2024 at 7:33 PM
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    9,675
    1,688
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    You probably won't notice much difference moving to 5.1 I'm sure some here are going to tell you it's not recommended for the system I have one of these cars well a generation two with purple silicone in it and it works just fine but that's another story The dot four is actually pretty good so you can just drain and refill for the most part but if you want to flush I guess you certainly can notice that you're reservoir is still for the most part clear it's not turned black etc because that fluid and the seals don't interact like it used to so you should be in pretty good shape internally is the point
     
    #2 Tombukt2, Aug 31, 2024 at 7:48 PM
(You must log in or sign up to post here.)