Help ID'ing loose heat shield parts

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by mercat68, Aug 11, 2025 at 2:55 PM.

  1. mercat68

    mercat68 Active Member

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    Hi. Subject car is a 2012 Prius V. I installed a catalytic converter anti-theft shield (Miller CAT Shield) today. To make way for the shield, I had to remove the silver, crescent-shaped OEM heat shield under the cat converter. I found that it was basically holding in place two free-floating sheet metal components (see photo). Assuming they were part of the heat shield assembly surrounding the cat converter? Can someone ID these and let me know if they're important to reinstall? Thanks.

    upload_2025-8-11_14-53-50.png
     
    #1 mercat68, Aug 11, 2025 at 2:55 PM
  2. xliderider

    xliderider Senior Member

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    I don't know what those pieces are, I didn't remove or deal with them, only the silver, crescent shaped shield was removed when I installed a catalytic converter shield on our Gen3 Prius.
     
    #2 xliderider, Aug 11, 2025 at 3:22 PM
  3. mercat68

    mercat68 Active Member

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    Thanks. Yeah, I didn’t remove either of them. They were just up in the space around the cat converter not attached to anything. The only thing that kept them from dropping out of the car was that crescent-shaped heat shield. Based on the shape, it looks like they would’ve surrounded the cat converter in some way, but I can’t tell exactly how.
     
    #3 mercat68, Aug 11, 2025 at 4:19 PM
  4. Georgina Rudkus

    Georgina Rudkus Senior Member

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    Looks like the aluminum corroded off around the screws holding the heat shields to the underbody pan.

    Knowing that, I preempted this from happening by placing 1 inch outer diameter stainless steel neoprene backed 1/4 hole fender washers under the screw heads.

    They can be had on Amazon.

    You can still do that over the enlarged holes worn through the aluminum.

    Just remove the 10mm head screws that are still there on the underbody. And replace them with the screws and large washers over the enlarged holes.
     
    #4 Georgina Rudkus, Aug 11, 2025 at 5:39 PM
    mercat68 likes this.
  5. mercat68

    mercat68 Active Member

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    Thanks!
     
    #5 mercat68, Aug 11, 2025 at 5:45 PM
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