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Water under 12 volt battery.

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by 001tom, Oct 7, 2021.

  1. 001tom

    001tom Junior Member

    Joined:
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    Location:
    Alabama
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Have a 2012 plug in prius. Think that first year was only a base type model. Several months ago I replaced the 12 volt battery, and discovered the back right corner where the battery located had a water puddle up to the battery. I got a turkey baster and drained the area when I replaced the 12 volt battery. I checked today and there was about a half inch of water. I see no evidence of leaking anywhere. Do not know where it is coming from. Is there any drain there? I park it outside. Anyone else seen this? It has been a very wet year in the southeast.


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    #1 001tom, Oct 7, 2021
    Last edited: Oct 7, 2021
  2. 001tom

    001tom Junior Member

    Joined:
    Feb 6, 2019
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    Location:
    Alabama
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Sorry, I should of searched the forums before posting. There is plenty of information about this and leaks at taillight, welds ect. I will check those areas.

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    #2 001tom, Oct 7, 2021
  3. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Vehicle:
    2010 Prius
    Model:
    Touring
    One possiblity is cracks in the seals in the grooves running the longitudinal length of the roof, the ones with black rubber runners. You can pull the runners out easily (just learned this recently myself), check there. I'd clean it thoroughly for starters.

    55E2A5F3-EAB9-46A0-8F11-C67E2F285A0E.jpeg 1FE9C982-CDBA-4602-B6DF-824AF4D7EE4D.jpeg
     
    #3 Mendel Leisk, Oct 8, 2021
    acceleraptor likes this.
  4. QuantumFireball

    QuantumFireball Active Member

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    Location:
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    Vehicle:
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    Not sure if it's a problem on these, but I've seen on other Toyotas of this era the seals around the air vents inside the bumpers can fail, letting rainwater into the rear of the car. Seals on the rear light clusters are a common issue on many cars.
     
    #4 QuantumFireball, Oct 12, 2021
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