Need Help to ID part number for Coolant Hose

Discussion in 'Gen 2 Prius Main Forum' started by rogerthat, Dec 27, 2025 at 6:33 PM.

  1. rogerthat

    rogerthat Active Member

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    I just got error code P1151 code which indicates an issue with the Coolant Heat Storage (CHS) system. I actually bought a replacement tank well over 5 years ago when a dump truck decided to take a short cut turn over the front of my Prius. Amazingly, even though the original tank was deformed, it did not leak and I didn't replace it. I'm not sure if the error code is due to the CHS pump, tank, or sensor.. but I might just replace them all since I already have all the parts.

    Can someone help me ID the part# for the hose that connects to the bottom of the CHS tank (directly opposite the drain plug). I've circled the connection location in the attached photo. The other photo shows the bottom of my currently installed tank where one can see some damage to that hose - note that the hose is not leaking so it might be ok to just reuse.
     

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    #1 rogerthat, Dec 27, 2025 at 6:33 PM
    Last edited: Dec 27, 2025 at 6:50 PM
  2. pasadena_commut

    pasadena_commut Senior Member

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    For issues like this, go to amayama.com. Look up the appropriate Prius (NHW20L-AHEEBA USA, all gen 2 years, there appear to be two different parts list for the early ones and the later ones), then "Radiator and water outlet" (link is from the link for more recent years):

    https://www.amayama.com/en/genuine-catalogs/epc/toyota-usa/prius/NHW20L/8936/engine/1603

    hover mouse over the part number in the diagram and it jumps to the relevant part(s).
     
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  3. rogerthat

    rogerthat Active Member

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    Nice Resource! it looks like it is part# 16264-21050 - can someone confirm this is the correct one?