Where does this mystery duct go?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Hank, Mar 9, 2026 at 5:45 PM.

  1. Hank

    Hank Junior Member

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    Hi Prius Enthusiasts,

    I disassembled the rear passengers section for battery replacement etc.

    Weeks later I cant recall where this white duct attaches. Anyone out there know and have a picture or diagram?

    upload_2026-3-9_17-43-50.png

    upload_2026-3-9_17-45-30.png
     
    #1 Hank, Mar 9, 2026 at 5:45 PM
  2. PriusCamper

    PriusCamper Senior Member

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    Is this a Gen2 Prius? Or a newer Prius? The battery duct work in a Gen2 Prius is black not white and this part doesn't look like anything I've seen inside a Gen2 (2004-2009) Prius?
     
    #2 PriusCamper, Mar 10, 2026 at 3:39 PM
  3. Hank

    Hank Junior Member

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    Yes Gen2 2007

    I do see the black battery duct work in there too. Somewhere in that vicinity this white duct was connected.
     
    #3 Hank, Mar 13, 2026 at 4:37 PM
  4. pasadena_commut

    pasadena_commut Senior Member

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    That looks like it splits from one large flow into 3 small ones. That suggests something HVAC related. The ducting for the the HV battery is just one big tube (in various cross section shapes) all the way from the air intake on the passenger side of the rear seat until it blows out the vent above the 12V battery.

    Edit: inspect the part carefully. It might have its OEM part number stamped on it somewhere.
     
    #4 pasadena_commut, Mar 13, 2026 at 6:45 PM
    Last edited: Mar 13, 2026 at 6:50 PM
  5. pasadena_commut

    pasadena_commut Senior Member

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    #5 pasadena_commut, Mar 13, 2026 at 6:56 PM
    Last edited: Mar 13, 2026 at 7:05 PM
  6. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Something in this pic? I've highlighted one, but just a guess:

    upload_2026-3-13_18-33-4.png
     
    #6 Mendel Leisk, Mar 13, 2026 at 9:33 PM
  7. pasadena_commut

    pasadena_commut Senior Member

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    Nope, that part is black plastic.



    at 4:29 and 9:36
     
    #7 pasadena_commut, Mar 14, 2026 at 1:48 AM
    Mendel Leisk likes this.
  8. Mendel Leisk

    Mendel Leisk MMX GEN III

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    Maybe not always? Funny thing is, OP just removed this piece, just can’t remember from where… time for a hypnotist?

    or just pull it all apart again, see where it fits?
     
    #8 Mendel Leisk, Mar 14, 2026 at 9:16 AM
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