OEM hybrid battery swap - how to swap electronics

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by underoathfan87, Apr 9, 2026 at 1:26 PM.

  1. underoathfan87

    underoathfan87 New Member

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    Location:
    Los Angeles
    Vehicle:
    2006 Prius
    Model:
    Two
    Got an OEM hybrid battery from the dealership to swap in for my old dying one on my 06 standard prius..thought it'd be plug and play but now it looks like i need to transfer the electronics over (ECU, relays, wiring harness etc) from the old one to the new one.

    Can't for the life of me find a good tutorial on youtube or elsewhere showing how it's done. I took the safety plug out but i know there's still a lot of current in the buses and opening up the battery to move the wiring harness over is sketching me out a bit without a good guide.

    Can anyone point me to a good resource on this or have other advice? The mechanical part of it's no problem, I just wanna make sure i know what is and isn't live before i start digging around in the battery..looked around the forums here but haven't found anything.
     
    #1 underoathfan87, Apr 9, 2026 at 1:26 PM
  2. saneesh8

    saneesh8 Member

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    Jul 5, 2024
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    Location:
    Allen, TX
    Vehicle:
    2009 Prius
    Model:
    One
    ChrisFix have a good one in YouTube.. Did you check that? He was changing the cells, but the electronics parts should be visible?

    How many miles on the original one?

    Here in Dallas area, there is a company comes to home and replace it with OEM battery for $2200 and they give 5 year warranty also.
     
    #2 saneesh8, Apr 9, 2026 at 5:17 PM
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