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loud drone? 2017 C two

Discussion in 'Prius c Care, Maintenance and Troubleshooting' started by gabey, Oct 19, 2022.

  1. gabey

    gabey Junior Member

    Joined:
    Jul 6, 2022
    5
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    Location:
    Orlando, FL
    Vehicle:
    2017 Prius c
    Model:
    Two
    2017 prius c two with 35k on it

    does anyone know what might be causing a loud drone sound? it literally sounds like I put a cherry bomb on this thing and it's droning like crazy. it does it real bad around 48-50mph and when accelerating to highway speeds. also when slowing down from higher speeds its pretty loud.

    would the recent cold weather have something to do with it? I bought the car in August and it had the drone then too but it was not this loud or often as it is now. it kind of started after I put a lift kit on the car but that makes no sense??

    no codes and didn't see anything broken or weird going on with the exhaust system. the sound is definitely coming from the rear though
     
    #1 gabey, Oct 19, 2022
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
    10,897
    4,418
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    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    If your catalytic converter is still there and no exhaust leaks then rear wheel bearing is possible, but not enough miles on the car for that. Maybe some loose underbody panels?
     
    #2 PriusCamper, Oct 19, 2022
  3. gabey

    gabey Junior Member

    Joined:
    Jul 6, 2022
    5
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    0
    Location:
    Orlando, FL
    Vehicle:
    2017 Prius c
    Model:
    Two

    cat is still there. no leaks from what I can tell everything looks just fine. I don't see anything loose at all. to me it doesn't sound like a wheel bearing at all
     
    #3 gabey, Oct 19, 2022
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,693
    48,945
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    bad tire? does itchange with speed? turning? ev or hv?
     
    #4 bisco, Oct 20, 2022
  5. Shahid Uddin Mahamud

    Shahid Uddin Mahamud New Member

    Joined:
    Dec 1, 2022
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    Location:
    Bangladesh
    Vehicle:
    2012 Prius
    Model:
    N/A
    If sound increases with speed then see tyres for badly deformed.
     
    #5 Shahid Uddin Mahamud, Dec 1, 2022
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