You should point out where the water is coming in. under the plastic strips on the roof, where the roof and 1/4 panel meet by the rear hatch - there is a seam that cracks open & lets the water come in. A little caulking will keep the water out. I also removed the drain plug for the spare tire. No more ice inside my windscreen. Thank you for your educational videos.

best to get battery terminal JIS to SAE adapters, then convert to normal post 12v battery.

Thank you Peter. Great video. Non Prius owner. The 2023 Prius Prime got and upgraded in styling . I'm down with the Kraut break. :) Thanks again. Kraut is very good for gut health. That is what someone once told me. :)

thanks, I just replaced the little battery for the 4th time in my 2007 Prius. as luck would have it all 4 times have been in the dead of winter here in Chicago when the car would not start on a very cold day and so after getting a jump I had to change this battery in the parts store parking lot in the freezing windy cold. Good times !! I have always put the 9 inch version into the car but often have been offered (and refused) the 7 inch version by the counter guy. I have never encounter the swimming pool of water but again since the battery always dies in the dead of winter, that pool would be frozen and so perhaps I never noticed. I have never looked down there except in sub-zero weather. I always wondered why this battery seems to last fewer years than my batteries in other non hybrid cars, perhaps its because the engine has to restart itself dozens of times during a typical city driving trip, compared to only one start per trip in a non hybrid. at least the starter seems to be hanging in there. cheers

Thank you, Professor. I am caring for my mom's 2005 Prius. Pristine. Yes, the auxilliary battery needs tending, and replacing. Solves 99% of her start issues. Thank you so much for swimming pool mention. I will do pool maintenance, too. Also, dryer sheets do discourage mice from using the resort inside the Prius.

You mentioned the pool of water and showed how to open the drain plug but, where is the water coming from and and how do we stop it? You also didn't mentioned if you replaced the drain plug which I assume you did. Can you address this in a short video please? Some people say the problem is a crack under the plastic rail on the roofs rain gutters but I'm not sure that's definitely it. Thanks for all the terrific videos!

Thanks for your videos 👍 I always learn something new 👍

San Francisco has many of these. One bought theirs on car care but. They spend money to fix anything just to have it working. Many key marks in door and walking by carrying purse and bag type of scratches on side door panels

Hi friend. Hope you are taking care of yourself. People should comment how long their batteries have lasted. Many people are on original for a long time!

Don't worry, I laughed the same way when I saw the water accumulation in my 3rd gen battery compartment 😅.. you opened the drain plug from the bottom, though on mine it opens from the battery compartment, which i think is a better cause it'll last longer before perishing. Great video btw!

This was great man thanks my next car is gunna be the 2nd gen I can finally afford one I can’t edit they really are great cars 💯

exactly like mine including the water LOL, thank you and very well done

So do you put back something in the drain plug after? Great video!

Liked and subbed :)

So we can install bigger battery? That means more mpg or more performance

Hello. Can I buy 40ah with 300a starting power battery for my 2006 prius ?

My Toyota Prius 2010 (low mileage) developed issues with EGR Valve, is this a common problem? Thanks for your response.

I change my batteries out on all of my vehicles every 3 years no matter what, this was advice from a older/wiser man than I…12years ago. I have very good luck doing this.

Mine has a hole in the "swimming pool area". Lol sigh of relief Got a duralast has 340cca less than a year in car and charging it outside car with a genius 2 charger. Hopefully get a warranty replacement from auto parts store.

Does the 2010s have the water problem too? I think it's a 3rd gen but my dad's had a musty smell and we can't find anything that's damp

Don’t forget that sauerkraut recipe you promised us!

Isn't the grommet a body plug to prevent corrosion? I think it backfired in this case.

My 2015 model reads 12.3v (no engine start), 13.7v in drive mode and 14.4v in parking with engine on

That’s was a lot of water. 😂

All the electronics work in my prius but the car won't turn on, lights work, Hazards work, pretty much everything but my prius wont start so I'm definitely going to replace the aux battery hopefully that helps

That looks and sounds EXACTLY like a horse taking a leak.

👍

I think the water problem was fixed for 2007 because I own an 07 and so far no water 😮

What about the title of the video, I thought I was going to be educated about a prius battery? Besides going on about the size of the thing I don't think he said anything useful or relevant. I don't think this guy knows anything of importance about the Prius except that he got a good deal on the vehicle. I thought I would learn something. He's got a lot of pretty tool boxes in his pristine shop, I wonder if he knows how to use them? I Took 10 minutes to find out nothing.

I replaced this battery and made a stupid mistake. After removing the old battery, I decided to put the new one in the next day. I closed the hatchback overnight. But the latch is electric. So the latch would not open. I had to climb over the back seats to manually unlatch. Duh! Had to laugh at myself. Ha.