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Whirring noise while braking??

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by BethlehemPrius, Jul 12, 2007.

  1. BethlehemPrius

    BethlehemPrius New Member

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    Ok I think I know the answer to this question, but asking it anyways.

    I don't recall hearing this noise before, only lately, so not sure if you don't hear it when it is new or if their is something wrong with the car.... Anyways, when braking sounds like something is making a whirring sound, which I am assuming is the regenerative braking system, odd part is that I don't ever recall hearing it before, just turned 8k on my car last week so I know she is now broken in. I don't think it sounds like the brakes are bad or anything so I am assuming that has to be what I am hearing....

    Any confirmations out there for me? Has anyone else noticed this later in the cars life but not right away..?

    Thanks :)
     
    #1 BethlehemPrius, Jul 12, 2007
  2. Rae Vynn

    Rae Vynn Artist In Residence

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    Mine has a high-pitched note, which is somewhere between a whistle and a hum... very quiet, only hear it when I have the stereo off. I assume that it is a normal sound for the car.
     
    #2 Rae Vynn, Jul 12, 2007
  3. qbee42

    qbee42 My other car is a boat

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    The regenerative braking makes a whirring sound like that on a subway, when the traction motors are running. There is also another noise when braking, which is the brake accumulator pump. The accumulator pump runs about every third time you press the brake, and makes a kind of clicking or clattering sound down near your feet. Do you hear your noise every time?

    Tom
     
    #3 qbee42, Jul 12, 2007
  4. BethlehemPrius

    BethlehemPrius New Member

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    Thanks for the confirmation, figured as much, but wanted to check with the crowd.

    thx!
     
    #4 BethlehemPrius, Jul 12, 2007
  5. richard schumacher

    richard schumacher shortbus driver

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    Don't feel bad. Some people go for months without noticing the flashing car key icon on the dash when the car is OFF; and then one day they do notice it, and panic :_>
     
    #5 richard schumacher, Jul 12, 2007
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