Brake accumulator?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by CaliMike, Dec 29, 2024 at 11:01 AM.

  1. CaliMike

    CaliMike Junior Member

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    I've rolled 240K on the 2012 Prius V.
    The issue is an air type noise which comes and goes when on the brakes at stoplights. I don't believe it is connected to a brake motor. It is like a puff air noise or something not to loud perhaps a bit like a seal. No lights have come on. My take is that it is the accumulator and that the ABS has to be replaced. I've also read to swap the brake fluid first that there may be bubbles.
    Has anyone purchased the ABS used or can they reccommend a site where I can buy?
    I appreciate any input.
     
    #1 CaliMike, Dec 29, 2024 at 11:01 AM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    A brake fluid flush has been known to clear up a brake booster problem if you get the dealer's $150 Techstream driven version. For one or two days and then it returns.

    If you buy a used booster it is almost guaranteed not to work, either because it is the wrong part number or it has also failed. Verification by donor car vin compared to your car's part found by vin is about the only way to know if a used part is correct.

    A v's brake booster is different than a hatchback even though the housing numbers are the same. In addition there are two different part numbers for a 2012 v.

    I would buy from an online Toyota dealer, ideally during a periodic sale although online prices are almost always 25% less than the local dealer's walk in price.

    With that said, I would verify what you are hearing directly under the hood. I probably would not buy the parts unless you get the code(s).

    IMG_7079.jpeg
     
    #2 rjparker, Dec 29, 2024 at 11:24 AM
  3. CaliMike

    CaliMike Junior Member

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    Thanks for your input, I will follow your advice and wait until I get the codes.
     
    #3 CaliMike, Dec 30, 2024 at 3:10 PM
  4. rjparker

    rjparker Tu Humilde Sirviente

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    Part of the advice is to determine where it's coming from. May require one person at the wheel and another under the hood with an auto stethoscope.

    Review this video carefully to help diagnose and to understand the job. It's a big one.

    Pine Hollow Diagnostics
    Prius Brakes FAIL

     
    #4 rjparker, Dec 30, 2024 at 4:10 PM
    Air_Boss likes this.
  5. Air_Boss

    Air_Boss Senior Member

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    Not a shade tree job...
     
    #5 Air_Boss, Dec 31, 2024 at 11:30 AM
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