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Loud rear flapping noise at 60+ mph

Discussion in 'Gen 2 Prius Main Forum' started by elmofongo, Jul 26, 2011.

  1. elmofongo

    elmofongo Member

    Joined:
    Oct 28, 2005
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    Location:
    SF, CA
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Howdy,

    I have a 2006 Prius and I've been trying to diagnose a flapping noise that's coming from the rear right side when I'm going above 60 mph approximately. It sounds like a "slapping" noise at about 2 or 3 "slaps" per second.

    First I thought something was stuck in the HV battery cooling fan so I took it apart and cleaned it. It was just dusty. That didn't solve the problem.

    I now suspect the rubber flaps covering the vent on the inside of the bumper (see attached picture). I'm not sure what it's called and I don;t know why is would start flapping now. I just had the car serviced for 120K miles.
    Any suggestions?

    Thanks

    -Adrian
     

    Attached Files:

    #1 elmofongo, Jul 26, 2011
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
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    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    I suggest you check the right-rear tire and axle to see if something is stuck to the tire or axle; or if the tire has a defect that is causing the noise. Good luck.
     
    #2 Patrick Wong, Jul 26, 2011
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