How to Tell When Your Tesla’s 12v is About to Die (before you're stranded)

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Every Tesla has a 12v battery under the hood, also known as the low voltage system (versus the high voltage powertrain battery). The Tesla's 12v battery replacement can be quite the process, so it's best to look out for the warning signs of a failing Model 3 12v battery or Model Y 12v battery (also applies to S/X), before it leaves you stranded.
12v battery specs: The battery is a group 51R, but it turns out Tesla uses a very certain type of this battery with an unknown EV-rating. You may be able to install a generic 51R battery in your Tesla, but buying & replacing directly from Tesla seems to be the best and only proper option.
Hide an emergency 12v battery: • Tesla Model 3/Y - Hide...
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0:00 Explanation
0:59 Signs of Battery Failure
3:38 How the Battery Fails
4:47 Battery Replacement Options

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Опубликовано:

7 авг 2024

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Комментарии : 87

@ptech88 2 месяца назад

My 2018 just notified me of an issue with the 12 v battery. No issues setup appointment on the app along with a brake cleaning had it done 2 days later for a grand total of $275. No fuss no muss. Love tesla

@donsolo96 10 месяцев назад

Mine died with no warning (no messages, no errors, no sign of it failing). Very annoying. Then again, only issue I have had with my MY in the three years I have owned it.

@TeslaPrince Год назад

FYI, i've seen a dozen videos claiming you can pop the frunk with a 9v or those small 12v batteries but not always! I helped a friend on his model y and tried both but they did not work, his 12v was REALLY dead due to his heat pump sezing and the high voltage battery would no longer charge his 12v. To open the frunk i had to use a lithium ion booster pack with the 'boost' feature turned on. Same to open the doors. So beware, those smaller 9v and 12v solutions may still leave you stranded, always have access to a booster pack.

@RayNLA 11 месяцев назад

Can you share a link to the booster pack you used? Thanks!

@rhuynh 4 месяца назад

Yes I had this experience recently and luckily I was at home and got the one I had in my other car. Otherwise that's the catch22! If you carry one in your car, you can't get to it bc to get to it you need it to pop the frunk!

@dathyr1 6 месяцев назад

Awesome. Thanks for all this information. I knew about the 12 volt battery, but had no idea how long they last. I live in Northern Illinois, so we also get cold winters. Thanks for all the possible warning signs. I got my Tesla August 2023 and hopefully good for a while with my 12V battery. Thanks and take care.

@mikesevgarage Год назад

Great video Troy! I’m hoping that I get a long life out of mine because it’s the lithium one 🤞

@josequinteros9209 Год назад

Great video, very informative thank you.

@treborg777 3 месяца назад

I’ve just changed the 12V battery in my 2017 MX for the second time preemptively because the consequences of letting the battery die are so serious. I change the big HEPA filter (“bioweapon” filter) at the same time, since it has to come out to access the battery. Changing the battery every three years is a good guideline.

@moestrei Год назад

My 12V battery died during an overnight software update. I live 450km (inland Australia) from the next service center. The software update was incomplete and the car not chargeable or drivable. Luckily i knew how to open the frunk and luckily (again) my ride-on mower battery fitted in ok. Tesla Service then shot through a new update ota and all was good. Car was not happy about the foreign battery but i dove for a few weeks until i needed to go to the coast and getting the right battery then.

@julienvm Год назад

FYI, newer Teslas are equipped with li-ion batteries operating at 15-16V, rather than traditional lead operating at 12V

@carl-Sp Год назад

Can I get one when my lead acid battery dies?

@moestrei Год назад

@@carl-SpNo

@keoghrichard1988 14 дней назад

@@moestreiwhy do you say no?

@moestrei 14 дней назад

@@keoghrichard1988 In my whole comment there is not a single no

@charliemeyer4651 2 месяца назад

My 12 volt died in less than 3 years with no warning. Totally inconvenient but it was replaced for free under warranty. The service tech came out and was finished in less than 10 min.

@HLF31528376 Год назад

5:30 seen it been opened with a standard 9V battery also when the car was completely bricked… It even got the doors to unlock and to restart the computer…🤔

@jimadams2113 10 месяцев назад

My first 12 volt battery only lasted 27 months. I'm replacing it every 2 years now.

@ryankibler7973 8 месяцев назад

I replace batteries in all vehicles every 2 years. Trying to squeeze over 3 years out of a battery is stupid.

@Scott-sm9nm Год назад

5:35 I'm pretty sure that I read a 9v battery will allow you to open your hood? UPDATE: the 12v looks like a better option as I've seen mix results on the 9v. Alternative way to keep the 12v is here: YT Tesla Model 3/Y - Hide An Emergency Battery - Tesla Tips by MTN Ranger

@lenimbery7038 22 дня назад

There’s also a place in the service menu with the voltages and health displayed. I’m guessing that if there’s a problem the error notices might pop up at the same time as anything shows here though

@SteveMuncy-zy1dk 4 месяца назад

A few important points that need to be emphasized. Since 2022 the lithium 16 volt battery has replaced the 12v battery and the lifespan of these batteries is 8-10 years and may be covered under the standard warranty. I believe that 12v will still pop the frunk in systems with the 16v battery. The system is designed to not allow popping the frunk from the accessible wires unless the battery is really dead thus preventing frunk access by thieves.

@jamesbuckingham8073 18 дней назад

Not an accurate statement; Have a 2022 MYP, checked; it is a 12V lead acid battery

@HubertHeller 9 месяцев назад

Mine went dead without any warning whatsoever after 2 and 1/2 years. Tesla sent a tow truck and towed the car to the service center. It's the only issue I had with my model Y. The Tesla technician said that there must have been a sudden drop of voltage, that's why there was no advance warning.

@thayne559 Год назад

a standard 9v batter will open the frunk too.

@nissan_skyline 10 дней назад

I have a 12V battery jumper/charger thing that I keep in my trunk. If my 12V battery dies, can I charge it with that device and use it again, or would I be better off just buying a brand new 12v battery instead?

@phat_gunpla_etc Месяц назад

of course if you worried you can replace the 12v battery early right?

@TatiTheLight 8 месяцев назад

What about low voltage battery?

@larryphillips4164 6 месяцев назад

9v battery works to pop my frunk.

@kevinfletcher1999 Год назад

You make it sound as though this is an EV problem. All cars have a 12 battery. My ICE car is 7 years old. Battery still going strong.

@txtabby 4 месяца назад

It is. Nothing is charging it.

@ted_jerome Месяц назад

12 V batteries in EVs do tons more work than in ICE cars, so they degrade about twice as fast.

@keoghrichard1988 14 дней назад

@@txtabbythat’s untrue, if nothing was charging it, it would be dead after a day 😂, it re-charges via the high voltage battery

@ramonmichaud3004 Год назад

Several garage door remotes run a 12 volt battery.(like the one described)

@ralstm1 Месяц назад

Great point. Most of us carry such a garage remote all the time. Thanks

@chidude Год назад

Does the 12V battery run the wi-fi system? I find it nearly impossible to connect to wi-fi for SW updates. The car and battery is nearly 4 years old; only have about 6K miles. If the battery is failing and I get Tesla to replace under warranty, would they replace with a lead-acid battery or a lithium battery?

@cybrtrkguy Год назад

Tesla would replace the battery with the same type- lead acid would be replaced with lead acid. And that’s super low miles for 4 years!! I have nearly 10x that in half the time 😂

@roadbiker1590 Год назад

Does Tesla service perform 12v battery replacement

@willinguyen1 Год назад

Yes, they do. Depending where u live, they can even come to your home to replace the battery.

@lindalealphamale Год назад

Aren’t the exterior door handles mechanical? I know there are interior mechanical door handles

@cybrtrkguy Год назад

Unfortunately, no. The exterior handles only activate the electronic actuators, while the interior emergency handles (driver and passenger doors) are fully mechanical.

@ananwolf Год назад

will the 12v battery open the frunk latch if the car have aftermarket auto-frunk installed?

@gilguevarra9894 Год назад

Auto frunk have have cable to pull out to open frunk.

@jamesbuckingham8073 18 дней назад

If y'all changed the electrical system for the install using aftermarket it will void the warranty, do your due diligence and check for yourselves; things could've changed in the last year?

@ericbarnett852 7 месяцев назад

I have a 15V and its lithium in my 2022 Model Y

@techweenie4712 6 месяцев назад

My Model S warned me that it was time to think about a new 12v battery, and Tesla Service actually offered the best price; came and changed it in my driveway. No drama.

@weariedcleric6306 4 месяца назад

How much did they charge you

@carlkelley4566 3 месяца назад

I got the warining a day after the car would no longer start.

@kalabash72 3 месяца назад

How's your brother Jack doing?

@macmac3870 Год назад

what is the average life of a 12V?

@cybrtrkguy Год назад

3-5 years usually, less in cold climates

@bosston8888 Год назад

@Troy Meekhof You get it wrong here. Usually, batteries in cold climates hold longer than in hot climates, but capacity is lower with low temperatures. On cold days battery performs worse, but holds even twice as long as in hot climate.

@heatround2752 8 месяцев назад

My previous ice car batteries died a month or two around the time the warranty was to expire. I.e., 36-month battery died at 36 +/- two months of warranty.

@iowa_don 8 месяцев назад

Actually I learned just yesterday that the Lithium Ion auxiliary battery is actually 16 volts.

@jamesbuckingham8073 18 дней назад

not compatible with 12v lead acid system

@vtxdaryl 23 дня назад

There is a way to open the doors on a dead Tesla. I saw it on RU-vid.

@anons000 Месяц назад

Bro clean your screen holy hell 2:00

@ivo4357 Год назад

so if your car's not moving and you're watching Netflix, playing games on the infotainment screen or listening to Spotify, this depletes your 12v battery and could cause the car to die on you????? If so, that's just a joke, having a battery under you that could power a house, but instead you're using a small 12v battery. Please tell me I'm wrong! I'm contemplating buying a Tesla and wanted to use the car's entertainment options frequently while standing still (downtime away from home), but this would make it impossible.

@cybrtrkguy Год назад

No need to worry! The high-voltage battery is tied directly to the 12v battery, so you can keep electronics powered on indefinitely, so long as your big battery is charged. The problem is the 12v battery (like any car) loses overall capacity over a few years, and the car can't run without one. Hope this helps!

@ivo4357 Год назад

@@cybrtrkguy Thank you. if I understand correctly, all this stuff gets powered by the 12v battery, but the 12v itself gets recharged by the big battery? Only when the 12v battery has deteriorated and can no longer load to 12v, you will have problems.

@cybrtrkguy Год назад

@@ivo4357 You got it!

@gregripp Год назад

When does the 12v battery charge? When the main battery is charging and/or when the ignition is on or both.

@cybrtrkguy Год назад

When the car is awake, there's constant power going to the 12v battery (either to charge to maintain). Only when the car is parked and Sentry is not on, is the 12v isolated and on its own

@Techridr 9 месяцев назад

Tesla is on 16v last few years.

@jamesbuckingham8073 18 дней назад

Not accurate, have a 2022 MYP; came with 12v lead acid battery

@Techridr 18 дней назад

@@jamesbuckingham8073 That's interesting. Did they keep the 12v for 2022 only on the Performance model? My 2022 had the 16v, also my 2023, but my 2022 was long range, my 2023 is LFP

@zeroandexe 7 месяцев назад

Yeah but my 12v just died without warning. Had to use the frunk cable and then jump start my car.

@txtabby 4 месяца назад

A lot of times the car won't give you warnings. Also lead acid batteries last no more than 2 yrs, if you're lucky, so check them at 18 mos. Then replace with a Iithium battery. They last about 4-5 yrs.

@jamesbuckingham8073 18 дней назад

Lithium battery is a 16v and not compatible with former 12v lead battery system. Do your own research.

@dirkpostma77 Год назад

So..I learned not to place any valuebles in the Frunk 😅

@justin-we1bv 11 месяцев назад

You can't pop the frunk using the jumper unless the Tesla is unlocked or the 12v battery is completely dead. So a thief would have to time it just right... unless they used a crowbar.. buy yea, prob shouldn't keep anything of value in a car anyway.

@perlaursen1885 Год назад

Very sad that someone has destroyed the fine video with annoying backing muzak. Hard to understand the speech, when the loud noise is on.

@kray97 Год назад

Glaring engineering oversights 101

@gregripp Год назад

This is why every auto with a 12v battery should have a small solar panel to maintain the 12 volt battery.

@ozone7 Год назад

You obviously have not heard the expression: "flogging a dead horse"... It doesn't work! Any "solar panel" power will be short cirquited by the bricked battery. (that's why it failed in the first place: sulphur-phosfate spikes that has grown over the years between the lead plates, and rendered the battery useless)

@thepurplemaskknows9383 9 месяцев назад

I just replaced the 12volt battery in my 2020 Model 3. There’s no guesswork or drama, the car indicates when that’s due. No need for this video.

@scooterD3 Месяц назад

Not true. You got lucky that it notified you, but it doesn’t always. In my case, car was working perfectly, then at 12:07am I got an alert on my phone that the battery is dying. I am already asleep. I wake up, and doors don’t even open. So yes, you should be aware and alert about these problems because you won’t necessarily get an alert.