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Knocking sound coming from liftgate area

Discussion in 'Stock 2011 - 2019 Ford Explorer Discussion' started by Zodiac, October 5, 2018.

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  1. Zodiac

    Zodiac Active Member

    November 21, 2016
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    Year, Model & Trim Level:
    2017 Ford Explorer Sport
    When the vehicle is parked I noticed there is a sound that comes from the rear passenger side/lift gate window area.

    It is a tapping noise, I have noticed it mainly when the vehicle is at a stand still and not moving...the air conditioning is not on and the sound happens both when the vehicle is on and off. I don't know whether I hear it while the vehicle is in motion but I will pay a little bit more attention to see whether it is or not.

    Does anyone have any idea what this might be?

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  3. thefranchise713

    thefranchise713 Well-Known Member

    April 22, 2016
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    City, State:
    Buffalo, NY
    Year, Model & Trim Level:
    '18 Toyota Prius Prime
    I had to shim the top of the plastic and bottom of the headliner with some foam tape on the driver's side. Started vibrating out of nowhere one day. Just needed a touch of padding.

    Recommend having a helper sit in the driver's seat, hold foot on brake/engage parking brake (get the RPMs to drop with engine load from being in gear), while you move to rear area of car to pin point--start by holding your hand on the plastic C pillar pieces and then on the headliner. If it goes away, apply foam tape to the top of the c-pillar (small piece is probably all you need).
  4. peterk9

    peterk9 Staff Member Moderator Elite Explorer

    December 28, 2010
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    City, State:
    Ottawa, Ontario area
    Year, Model & Trim Level:
    2020 Aviator Reserve II
    That fact that you hear it with the vehicle turned off is interesting. In that case, I wouldn't think it should have anything to do with vibrations or anything being active. Does it disappear at all after a period of time once the vehicle is turned off? Did this issue just start? Any chance a little critter found its way inside the panel? Your subwoofer is located in that area on the side.


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