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Knocking Sound from the Rear

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by flareak, Feb 7, 2011.

  1. flareak

    flareak Fleet Captain

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    Before anyone gets all huffy puffy... I did do a search and I did not come up with a definitive answer. Also, one post was many years old so I did not bother reviving the post.

    The issue is, when driving at low speeds, especially after coming to a stop, I hear this intermittent knock that comes from the rear of the vehicle. I am not sure if it is coming from the outside or inside, but it really sounds like it is coming from the chassis.

    I know other users have had this problem (from the searches) and I was wondering if anyone has discovered what might be causing the sound.

    Thanks!
     
    #1 flareak, Feb 7, 2011
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    I suggest that you have your suspension and exhaust system checked out. Maybe:

    - a rear strut has failed.
    - the rear sway bar that you installed is loose.
    - an exhaust system hanger has broken.
    - there is something loose in the spare tire well
     
    #2 Patrick Wong, Feb 7, 2011
  3. MelissaAnne

    MelissaAnne New Member

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    [​IMG]

    Just a guess....
     
    #3 MelissaAnne, Feb 7, 2011
    2 people like this.
  4. bisco

    bisco cookie crumbler

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    i hear you knocking, but you can't come in...
     
    #4 bisco, Feb 7, 2011
  5. MelissaAnne

    MelissaAnne New Member

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    Because you can't see where they're knocking?? :)
     
    #5 MelissaAnne, Feb 8, 2011
  6. flareak

    flareak Fleet Captain

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    Well, I looked under the car and sure enough, there were two people right in the rear bumper just knocking. I asked why and they said they were playing punch buggy on my car :-/
     
    #6 flareak, Feb 8, 2011
  7. firepa63

    firepa63 Former Prius Owner

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    Jimmie Hoffa?
     
    #7 firepa63, Feb 8, 2011
  8. bisco

    bisco cookie crumbler

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    glad we helped you resolve this!:rolleyes:
     
    #8 bisco, Feb 8, 2011
  9. MelissaAnne

    MelissaAnne New Member

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    Glad I could help.
     
    #9 MelissaAnne, Feb 8, 2011
  10. flareak

    flareak Fleet Captain

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    Hehe. In serious though, I'm at the dealership having my sway bar tightened and the rear of the car inspected while its on the lift. I'll update ya'll if it gets fixed.
     
    #10 flareak, Feb 8, 2011
  11. bisco

    bisco cookie crumbler

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    hope that's the problem, all the best!:)
     
    #11 bisco, Feb 8, 2011
  12. flareak

    flareak Fleet Captain

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    Yep, that was the issue. The knocking sound is no more. With the sway bar tightened and the two miscreants pulled from the bumper, I am terror free!
     
    #12 flareak, Feb 8, 2011
  13. bisco

    bisco cookie crumbler

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    excellent! well done. but i don't know if we got enough fun out of this thread!
     
    #13 bisco, Feb 8, 2011
  14. kenoarto

    kenoarto Senior Member

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    what ever you do, don't answer the phone...the murderer is in your car!!!
     
    #14 kenoarto, Feb 8, 2011
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