Drain plug under 12 battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Hayward101, Jan 16, 2026 at 6:53 PM.

  1. Hayward101

    Hayward101 New Member

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    I just replaced the 12V battery in my 2009 Prius. There was several inches of water in the compartment. I drained it and am planning to seal where the hatchback meets the roof since I read that is often the culprit. I realized I accidentally left the drain plug out under the battery. I'm not the most handy and it was challenging for me to get the battery out, can I just buy a plug that can be stuck in from the underneath side or do I have to take the battery back out? What kind of plug would be best? Thanks for any help.
     
    #1 Hayward101, Jan 16, 2026 at 6:53 PM
  2. bisco

    bisco cookie crumbler

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    you could clean the area and try something like gorilla tape. don't leave it open though, mice like easy entries
     
    #2 bisco, Jan 16, 2026 at 8:25 PM
  3. Hayward101

    Hayward101 New Member

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    Ok thanks I'll put some over it in the meantime.
     
    #3 Hayward101, Jan 16, 2026 at 8:33 PM
  4. Tombukt2

    Tombukt2 Senior Member

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    No do not do that leave all the rubber plugs out for Christ's sake they're supposed to be removed at PDI they shouldn't be they're.. eve water should pass not stand. every where those plugs should be carefully removed . Unless you driving thru floods regularly. Even then water needs to pass.
     
    #4 Tombukt2, Jan 17, 2026 at 7:42 AM
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