How To Change A Battery In A Prius




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Did this video help you?

Jonathan Warner: Is the aux battery the same as the starter battery?

Rick Silberman: Thanks. Helpful, but instead of saying "this bolt here." Or "that cover there." it would be helpful if you could point with a screwdriver.

Jiten Arora: Awesome !! :)

Susan Priano: Thank you so much! This was a great help when my battery died after hours I was able to get a new one and install it in a few hours. The only issue I noticed is my clock seems to return to 1:00 after the car is off for a few hours. Any ideas?

buyandby: I just got my 2009 back from having this replaced. $365 US, and it fixed tons of problems that I have been complaining to Toyota with no response other than we can't do anything about it. First off, my car was sort of Deiseling out, when it the ICE (Internal Combustion Engine) was not supposed to be in use (Stopped, going down hill, batteries all charged up in the green, and no A/C on) and yet we never got better than 40.6 mpg because of this problemwith the 12V battery since day one. Toyota service people make you feel so small and yet I was right all along as soon as the battery was replaced, it operatesperfect. The ICE stops without dieseling out, or continuing to run when it shouldn't, and I get over 45.4 mpg now for the first time. TOYOTA YOU SHOULD ALL BE ASHAMED OF YOUR SELVES!!!!! SERIOUSLY YOU SUCK!!! 5 years wasted you arrogant bastards.

CTP8585: SORRY, this video is completely useless to me. I kept hearing, here, and there, without seeing you POINTING at any location. Therefore I do not know where is " here" and where is " there". Sometimes the the video did not show exactly " WHERE' you were talking about. IF you use something to point out exactly " HERE" and exactly " there", that will show everything clearly. Can you make another video to show us (me) where is "here" and where is " there" ???Thanks for your effort of posting this video but it did not work for me.

Michael Owens: Very helpful, clear steps, instructions uncomplicated, now I'll see if this mechanically challenged missionary priest can get it done??!!

Mark Bauman: Thanks for the info. Could not have done it without it! NEVER would have found that last screw holding the vent tube. Not as bad as changing the driver-side headlight, but close.

Steven Wise: Very helpful. Battery cost me $175 at an oreillys in chicago, but maybe I've saved that in gas. Probably not. 

Gary Browne: Ryan, Sure appreciate that you took the time to do your video and help others like myself! I changed my wife's 2009 battery. Best regards. Gary Browne

Rex Takasugi: Very useful video! Without your video, I think I would have just taken it to the dealership as it looked kind of complicated with all the electronics and air vent tube to remove. Thanks!

Linda A. Noble: What source would you recommend for purchasing the battery? Any particular things to look for or avoid? I'd like to try to do this myself too. Thanks!

Matt South: @lakssampath It looks like it's a direct fit, thank you VERY much for posting the Optima part number!

Eve Soto: Not all Pruis are created equal... Am I missing something but I don't see what year model is this Pruis...

danwat1234: It is for 12V accesories as the dash board and radio, windows use 12V power, it uses a 12V battery to power these devices. I know, you're thinking why not just use a power converter from the main battery pack to convert down to 12V. Well, the problem with that is that it would have to be running all the time even if the car is off, so the clock keeps working, radio presets, door locks, and then would use a lot of energy and eventually you might be faced with the expensive pack being low on juice

Paul Priz: thanks, very helpful!

danwat1234: So they use a 12V battery to supply the accessory power when the car is off and when on there is a power converter that converts power from the main pack to the lead acid battery.

Ryan Bailey: without this battery you will not be able to 'start' (power on) the Prius. Never heard of such nonesense. Your friend must have done something wrong. If you like you can hook up a trickle charger under the hood to the terminals but it is not necessary. Biggest issue is reprogramming your radio stations and having your car relearn your driving habits. Glad I could help you.

Ryan Bailey: Yes, second Gen.

nihonsuki: This was a big help. I just wanted to add that there's a small rubber hose and elbow fitting that go into the left side of the battery near the + terminal which will have to be inserted into the new battery. The elbow fitting was fastened to the old battery with a drop of glue which I broke to remove the fitting. The loose slide fit into the new battery seemed to be enough to keep it in.

charles ben: thanks i did it it was very easy it took me 45 minutes took my time thanks again have a great day know can i charge the other dead battrie and save it for rea acid it at a repair shop im going to check it out thank you again

GoMetricToday: I have a 3rd Gen.

Laks Sampath: Thank you very much for the detailed instructions. In a matter of less than 2 hours I removed the old starter battery and put in a new Optima DS46B24R YellowTop Prius Auxiliary Battery for my 2006 Prius.

moxncal: i dont get this, they use tons of nimh batteries for the engine and they still use lead for the car battery? damn toyota techs!, they need to do away with the lead acid battery!!

fredronquist: @rrbcap Regardless of battery size, the procedure is exactly the same. The video is great; the manual does not give enough instructions on how to change the battery. Apparently you can change the brace in the bottom of the battery compartment to fit the larger battery, which might be a good idea for us living in a colder climate (we're in Sweden now).

brianflower45: Thank you! Saved me money and with your video look about 30 minutes.

Kevin: Yeah but you only need to change it every 5-6 years.

Ryan Bailey: @jaxo1 You're lucky you got anything :). I'm sure you can find another full video somewhere. Good Luck!

Joseph v: Just replaced mine, battery's must've gone up looked around spent 2 bills and dealer wanted 350..figured it was worth 40 mins of my time....slow i know, i was careful! thanks man!

Ingvar Humanus: Two questions. 1. Volt is not much different in principle design from any other hybrid drive. Still and ICE and battery and MG. What made you go away from Prius, and go for Volt and sort of sound derogatory about Prii? Reliable they are, that is the fact, have not seen a single Volt as a taxi. 2. What exactly this means: Move along now please.

Linda A. Noble: Thank you! I will call the dealer now and order it and cancel my appointment at the same time :) I'll let you know how I do.

Ryan Bailey: @turdsandwicher agreed. Fun to get to too.

Ryan Bailey: @fredronquist You are exactly correct. There are aftermarket conversion kits to fit bigger batteries. I was surprised I got 7 years out of the 12V Battery but was shocked on how much the dealers wanted to charge to just change a battery.

Ryan Bailey: You are very welcome!

lgatzow16: Thanks so much for the video. Hubby & I replaced our original auxiliary battery in our 2006 Prius with the Optima DS46B24R (company is offering a $25 rebate at time of this writing), plus we received a 15% discount at Advanced Auto Parts off their list price (in case anyone out there is looking for a deal). Thanks again!

Ingvar Humanus: 1. This is not starter battery. HAS NOTHING TO DO WITH STARTING ANYTHING. 2. USE BACK UP BATTERY WHILE REPLACING THIS ONE, HOOKED UP PARALLEL. Unless you want to see "Check Hybrid Drive" message on display, and have car not starting. That he didn't, does not mean you won't. I know at least one guy who had to pay $520, as a result, by "simply" disconnecting 12V battery and replacing it.

Bill Furlong: Just encountered needing a new battery as well. Thank you for making this really easy to understand. I too will save dealership money and do it myself, thanks to you!

Ryan Bailey: Ingvar, the Volt is much different than the Prius. I don't want to get into a disagreement with you, not worth the time and effort. :). 1.) The Volt is all electric drive all the time. 2.) Electric Heat. 3.) ICE serves as a generator and it's sole purpose is to generate power to charge the battery 4.) I can run on pure EV and not use a drop of gas. 5.) Regen is much greater 6.) Motor is 110kW motor. big enough to power 12 hours :) 7.) I'm running out of room to add more.

TalmadgesArcade: Yes, can you post a "part 2" with the rest of the video? Thanks so much for posting this, I will be following these steps tonight :) (2009 Prius)

fredronquist: Great help, thanks for posting. Slightly easier procedure for removing the assembly on top of the positive terminal is shown on the related video by briansmobile1, which is also very helpful . Be sure you get the right battery size. Older 2G Priuses have a smaller battery (S3420R) while newer ones have a larger (S4624R) one. It is claimed they changed to the newer battery in 2004 but our Prius, a 2005 bought in Forida, had the older battery.

Ryan Bailey: Honestly, I would just go with an OEM Toyota Battery. Just contact a dealer and they will order you one. There are some aftermarket batteries you can retrofit. It wasn't worth the time for me to mess with though.

Ryan Bailey: uh, yeah, that is why my initial reply to you said power on. Regardless, if you have a dead 12V battery you will be stuck along the side of the road. I owned one of these for 8 years and now I own a Chevy Volt. Move along now please.

Ingvar Humanus: It has nothing to do with starting, as in "cranking" starter. Neither Prius nor Cmary Hybrid nor any other vehicle with Toyota Hybrid Synergy drive has starters. ICE - internal combustion engine - is cranked by MG2, motor generator 2. 12V battery serves only as a backup power supply to ECM and 2 auxillleris, one of them being a/c. So yes, if you have 12V battery dead, vital electronics simply will not be able to work in order to power up vehicle and in order for MG to start engine.

GoMetricToday: Is your Prius a 2nd Gen? My 12v battery is on the left side of of the cargo area.

fliegeroh: Thanks a lot. You are a lifesaver.

Michael Gallagher: Thanks RRBCAP, the battery replacement procedure went pretty smoothly, And I was glad to have watched this first.

Matt South: @lakssampath Did the optima fit as-is, or did you need any additional parts to make it fit the connections?

rrobin1057: ???? where is your amp at i'm trying to find out where to put mine at a 4 channel amp

Ryan Bailey: @fredronquist Interesting that your 05 had a G2 battery. Hope this vid provided some help. I was looking for documentation on how to replace the battery so figured I would make a little clip and save others some time.
Rating:
How to change a Battery in a Prius 4.4 out of 5

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Latest Comments

Jonathan Warner: Is the aux battery the same as the starter battery?
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How to change a Battery in a Prius