Take it to almost any auto parts store and they will test the battery for free and replace it with the correct battery at a lower cost than the dealer. Make sure they use the correct size and capacity battery recommended for your car. Don't let them talk you into one that "will work" or " is close".

 

Take it to almost any auto parts store and they will test the battery for free and replace it with the correct battery at a lower cost than the dealer. Make sure they use the correct size and capacity battery recommended for your car. Don't let them talk you into one that "will work" or " is close".

has the alternator belt snapped into? The newer vehicles cit off immediately when alternator not charging or belt snaps. No more days of running on the battery until it starts missing and backfiring due to lack of voltage 3 hours later. Computers are made to operate on12.6-15.4 volts. Anything below that and it will not function. Mitsubishi / Chrysler are the worst for voltage below 12.3 volts!

 

Isn't it covered under warranty?

 

A 12V should run no more than $300. $1400 would be for the traction (or hybrid) battery.
The 12V powers the computers and closes the relays to the traction battery, which in turn powers the motors to make the car go.

 

Thanks all. We're out of warranty so I'll check with a local parts store. FWIW this is the part listed on Toyota's website for their 12v battery. That price seems crazy.

 

The website has the wrong price for a 12V battery. As I and other have said, should be no more than $300. Toyota has a Truestart battery for $160.

https://parts.toyota.com/p/TRUESTART-BATTERY/69277381/0054424F60575.html

 

That price is crazy. Parts stores have them for about $250

 

Canadian Tire has this one. I am sure, any decent car parts retailer in the States would be comparable.

 

Canadian Tire has this one. I am sure, any decent car parts retailer in the States would be comparable. View attachment 408173

I was trying just now at Interstate Batteries and they didn't have the 21 Venza, but they had the 21 Rav4 Prime. The results for the Rav4 Prime gave me the same result as @roaddog113:

• Group size H4 (47)
• AGM type
• 650 CCA

I've read that the Venza uses an AGM battery, so it was just a question of the form factor (group size) and recommended CCA. With so many other things shared between the Rav4 and Venza, I'm not surprised if the 12V battery has the same form factor, so this makes sense.

 

Make sure you get Group H5 AGM battery, not regular flooded. Yes like said above these about $180-250. Costco has it for $180.
If you are handy it only take 15 mins to replace. For Battery finders use RAV4 Hybrid XLE with Smart Key option. Venza is not populated in many websites, and even if the vehicle is populated the battery finder mapping not done.

 

 

Go to your nearest Wal-Mart and get a battery. They're good batteries and have good prices.

 

Thanks everyone, NAPA Auto got us sorted for $180. The hardest part was getting the trunk open with the dead battery. I had to pop the compartment off and manually open it from the inside given all the electrical only components on these things. Back up and running just in time to get some lobster for Xmas dinner from the local fishmonger. Happy holidays everyone!

 

A 12v jump to the battery remote jump points under the hood should give enough power to start vehicle and/or activate the electric trunk lid.
If the 12 volt battery is discharged -----Page 469 in the owners manual.

 

I ran into a similar issue. The Toyota parts website showed $1400. I called my local Toyota dealer and they quoted me $199.99. My original battery is a Panasonic made in Japan. But I will never pay $1400 for a 12V battery no matter where it's made or better than other batteries for sure.

 

When a battery is changed out, nowadays, isn't there a complicated procedure to accomplish ( besides the battery, itself ), to make sure everything is working properly ? For example, the power windows may not work, and other things vital for operation(s) ? My mechanic disconnected my battery for a 'check engine light' issue, I drove away, and all kinds of things were goofy---it's NOT like the old days---where a simple SWAP of a battery is a snap. PLUS, IF you buy a new battery---no matter from where---it should really be FULLY CHARGED before Installation...NOBODY does this, so you drive away with a limp battery, to start ( you don't know how long it has been sitting on the shelf, even tho the date is supposed to be clearly given ).

 

Sage advice, this is true. I have always had success at Interstate Batteries if you're fortunate to live in the area near one. They're nationwide but I realize not everywhere.

 

... Make sure that the stall problem is not due to moisture, which sometimes condenses from air in the gas tank. A glob of water can travel from the tank to the engine and cause stalling. A bottle of an engine additive, such as Seafoam, added to the tank, can usually prevent this. Also, keep more gas in the tank during cold weather, in order to reduce the volume of moist air.
... edjt ... meant to apply to standard gas only engine, not so much for hybrids.

 

... Make sure that the stall problem is not due to moisture, which sometimes condenses from air in the gas tank. A glob of water can travel from the tank to the engine and cause stalling. A bottle of an engine additive, such as Seafoam, added to the tank, can usually prevent this. Also, keep more gas in the tank during cold weather, in order to reduce the volume of moist air.
... edjt ... meant to apply to standard gas only engine, not so much for hybrids.

Except the problem isn't that the engine won't start, it's that the 12V doesn't have enough juice to start the hybrid system. The 12V needs to start up all the computers when you press "START", but low voltage will make the vehicle error out and sometime act completely dead.

Once the Hybrid system is in READY mode, then the high voltage traction battery is used to turn the engine, not the 12V battery. Not saying that you can't get moisture in the fuel, but this is a different problem.

 

https://www.toyoheadquarters.com/threads/2021-toyota-venza-depleted-dead-12v-auxiliary-battery-t-sb-0070-21.2372/

 

After replacing a dead battery, with a new one. Place the key or start button to the on postion (not running) and wait one minute B4 starting the I.C.E .Engine. The Hybrids are probably similar for a fresh reboot. For the windows and or a sunroof , it`s better to have them fully closed B4 the reboot.

 

<<<I'm worried about costs given we just got out of warranty protection>>>

I'm curious...out of warranty due to "excess" MILEAGE?

 

People LIKE to hyperventilate and make themselves (and others) crazy. In my not so humble opinion (IMNSHO) that the 12v battery on a hybrid discharged itself after 6 years is , well, frankly, to be expected. Most batteries will do that after 4-5 years, the AGM battery that's OEM from Toyota is batter than a lot of batteries, but has NOT been granted super-powers.
As far as a "complexity" when replacing a battery.... Well, yes you have to reset the power windows, in exactly the same way I had to on my 2000 & my 2005 Avalons, and on the ES350.
Not exactly a big deal (Run each window down to bottom, hold button for 3-5 seconds, now raise windows to close, and again hold button closed 3-5 seconds -- Done). Will your radio stations etc., still be there maybe yes, maybe no...OMG the horror, you may have to set stations up again, yes, truly, a (First World) PITA.

BTW... Toyota uses a 12v AGM battery that's vented to the outside of the car, to get rid of acid fumes that could corrode various terminals & junctions on the expensive traction battery. The AGM batteries, aside from being able to be mounted in most any position [including upside down] are very little different from flooded batteries, they may produce less sulfuric acid fumes.
In a pinch, a flooded battery will do, just be sure to hook up the plastic vent tubes in he trunk, to the vent outlets now found on many, if not most, standard 12v batteries.

 

This is my new info source on hybreeds. Hope to hear how the dealer adventure turns out. I'm a 35 year Toyota ICEman.

 

A good quality replacement car battery (12v) should be about 200 bucks. But it is quite strange once started that your car would die out. Once the car is started, the alternator provides all the power needed. So troubleshooting is kind of weird It’s possible the battery internally short-circuited, which exceeded the alternators total output. You should pop in a new battery ASAP, and if that doesn’t fix the problem, then something weird is going on. (Maybe check for rat activity, chewing the wires).

 

<<<In my not so humble opinion (IMNSHO) that the 12v battery on a hybrid discharged itself after 6 years is , well, frankly, to be expected.>>>

Where are you getting 6 years?

it's a 2021 Venza. I don't know when he took delivery, but it can't be >2.5 years old.

Any battery can fail at any time and who knows under what "conditions" he drives and "stores" his Venza.

Our '21 sometimes sits 4-5 days at a time w/o being driven but we are in Hawaii so low temps are not involved. I must admit I think about this 12V battery "state-of-charge" deal occasionally.

 

I've been driving for over 40 years, and one thing I've noticed is that modern cars (or is it modern batteries?) seem to go from 'perfectly normal' to 'dead' with no warning. In the 'old days', a dying battery would reveal itself by cranking the engine with difficulty, a sure sign you need to get a new one. But the last 3 cars I've owned (ICE vehicles) all had batteries that just 'died' suddenly one day, without any prior indication whatsoever. It seems they ought to be able to develop some kind of sensor that detects whatever it is that's going wrong ...

My g/f's Prius also had the 12V battery die unexpectedly not long ago.

I now have the 2021 Venza; sounds like I need to figure out how to open the rear hatch with a dead battery! Is that covered in the manual?