Solution to : Rear Brake not working because of Clog

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by wirelessjava, May 3, 2026 at 9:21 PM.

  1. wirelessjava

    wirelessjava Member

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    My 2005 Prius with close to 110K miles ( Yes it is low)

    I did not change the brake fluid in a very long time and when I changed it nothing was coming out of one tire. So I took it to the shop and they blew pressurized air through the system and it cleared the clog. Cost $100.

    Long term lesson is change your brake fluid so you prevent water in the brake system so it does not clog or gets rust.
     
    #1 wirelessjava, May 3, 2026 at 9:21 PM
  2. Tombukt2

    Tombukt2 Senior Member

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    That's interesting from Union City California too I've never seen a Prius yet with water in the fluid I've several cars hitting 600K at close to same times. I also work on quite a few . Many or most have never been changed . But monitored for moisture . Prius has calipers and brake pistons that do not rust . So other than lines which are very modern alloy. You rarely see a Prius with rusting brake lines or any of that like you do in a Corolla. I've never seen personally I'm sure the rust belt has
     
    #2 Tombukt2, May 4, 2026 at 12:09 PM
    BiomedO1 likes this.
  3. BiomedO1

    BiomedO1 Senior Member

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    "So I took it to the shop and they blew pressurized air through the system and it cleared the clog. Cost $100."

    That sound like a whole lot of BS.... Why would anyone blow compressed air through a brake system when the brake fluid will be at least 10x the magnitude when the brakes are applied???? The bleed fitting was most likely clogged - <$1 replacement cost, then bleed to push out any air. Worse case; wheel cylinder replacement - $100 charge would be a fair price for that work.
     
    #3 BiomedO1, May 4, 2026 at 12:21 PM
    Last edited: May 4, 2026 at 12:26 PM
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