Mystery Part ! Please help ID

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by guuunks, Apr 25, 2025 at 11:38 PM.

  1. guuunks

    guuunks New Member

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    I have a mystery part question. Thought someone might be able to help me solve it.

    I found a random part not attached to anything just resting on the frame of my Prius just behind the lower motor mount.

    I was down there replacing some rubber exhaust hanger and seeing if I could reattach this lower heat exhaust manifold heat shield that came off when it rusted off around the bolts. Side question, don’t know if I can easily get it back on there…how important is it to try and get back on? (see this companion post: Exhaust Manifold Heat Insulator #2 | PriusChat)

    Here are the photos of where I found the part, both with the part sitting there and not:

    [​IMG]
    [​IMG]

    For the life of me I can’t tell where this thing came from and it didn’t seem to fall from above. So strange.

    Here are some photos of the part by itself:

    [​IMG]
    [​IMG]
    [​IMG]

    My hunch is that someone at a shop I took the car to at some point took this part off and placed it on this spot in the frame as they were doing work only to forget it was there when they lowered the car.

    My records for the car show the following service being done at different shops:

    - 11/2019 - Replaced Hub Assembly on Front Wheels
    - 08/2020 - Replaced Front Ball Joints
    - 11/2022 - Replaced Front and Rear Struts

    Curious what your thoughts are, are you able to ID this part?

    Car seems to be running very smoothly for the past few years, no major issues.

    Thanks!
     
    #1 guuunks, Apr 25, 2025 at 11:38 PM
  2. pasadena_commut

    pasadena_commut Senior Member

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    Rubber on top and metal on the bottom? Looks like some sort of shock absorbing mount, and the bolt/stud which had passed through it, and through the hole below where it sat, is gone now. The shape and size is sort of similar to a ball joint but the pictures I found online of the front ball joints on the Prius didn't look like that. Perhaps under the outer rubber they do?
     
    #2 pasadena_commut, Apr 26, 2025 at 1:39 PM
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  3. PriusCamper

    PriusCamper Senior Member

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    Take it to the shop and ask... My guess is that this part fell into that spot and the shop had those pieces on hand and simply used a new one rather than looking for the old one. Pretty sure if this part wasn't in place with a new one that you'd have noises and other symptoms.
     
    #3 PriusCamper, Apr 26, 2025 at 2:59 PM
  4. mr_guy_mann

    mr_guy_mann Senior Member

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    I will guess that was some type of "tuned vibration damper" that came apart because of rust.

    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Apr 26, 2025 at 6:39 PM
  5. MAX2

    MAX2 Senior Member

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    12313-21030 Engine Mount Adjuster Bracket (For Transverse Engine Mounting).
    This part has come loose from the bracket.
    See how it should look.
     

    Attached Files:

    #5 MAX2, Apr 28, 2025 at 12:03 AM
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  6. PriusCamper

    PriusCamper Senior Member

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    Nice work recognizing that! Only remaining question: is this from the existing mount, or previous mount?
     
    #6 PriusCamper, Apr 28, 2025 at 2:57 AM
  7. MAX2

    MAX2 Senior Member

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    Judging by the photo, the bottom of this bracket is not very fresh. Corrosion has eaten away a fair amount of metal, so this part that fell off is most likely from the bracket in the first photo.
     
    #7 MAX2, Apr 28, 2025 at 3:04 AM
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