Tesla Rolls Out ‘Child Left Alone Detection’ Feature in 2025.14.12 Software Update

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So what's to prevent the car from doing this when my teenager wants to chill in the car because she doesn't want to shop with us? Or when the driver is running inside somewhere so we put it in dog mode to keep the climate from turning off while others wait in the car? I'm genuinely curious if it is only going to detect small children or just start drawing attention to the car anything a human is inside without the key...

“The feature is enabled by default, but owners can disable it through the in-car menu by navigating to Controls > Safety > Child Left Alone Detection.”

Makes no sense they need a radar for this, surely the same outcome could have been achieved through the cabin camera in the mirror, and have it roll out to all cars..

Just put it in dog mode

I wonder if the feature will be disabled for Dog Mode or if the Climate is set to keep.

Yeah it’s certainly odd. So the cameras are fine for life and death types of driving situations but a radar is needed to detect occupancy inside the vehicle? Uhhhhh….

Curious to see how this works but I’ll never knock a company for attempts to keep kids safe so I appreciate the effort nonetheless.

I cant imagine it would be on when you have dog mode or camp mode enabled.

I’m pretty sure they said it detects heartbeats thru the seats (I’m probably wrong but that’s what I remember hearing from an interview last year)

The No Child Left Alone Act

This is a good feature. Kudos to Tesla on this one.

Keep Summer Safe mode irl

The camera doesn’t have full view of the rear seats. This is the type of feature that cant afford a wrong result.

If you have a rear facing child seat you can’t even see your own kid by turning your head from the driver’s seat. Makes sense to use radar in this case.

Weight sensor in seat, there’s no heartbeat sensor. Likely also uses cabin camera to check for interior motion

Given that my Tesla often thinks my backpack on the passenger seat is a passenger who needs a seatbelt, I’m guessing it’s just weight.

Probably uses the weight sensors and cameras to determine the situation

“WARNING! BACKPACK LEFT BEHIND. PLEASE RETURN TO YOUR CAR!”

Probably camera too, otherwise that would get very annoying, very quick

But then you’d know you intentionally left your baby in the car.

no the car is always in dog mode

You can already select for any backseat to have a car seat in, in fact, it already has a kind of automatic car seat detection based on Weight. I’m guessing this time it will just have some way of logging added weight in that seat when you go out to drive and if it’s still there when you walk away, you will be alerted. I don’t think it will use anything like cameras because small babies and car seats can’t be viewed by the camera.

The cars with internal mm-wave radar sensors can detect heartbeats. Seat sensors just use presence via weight

It’s sad they need to build this

The internal mm wave radar is very good at occupant classification. Even when the occupant is in a rear facing infant car seat not visible to the camera. It is why this feature requires the interior radar.

The other car manufacturers have implemented this feature seemingly primarily through a sensor mounted fairly high... So I guess camera or infra red or similar. In case you are wondering, this feature is apparently required for a 5 Star safety rating in many countries, so some manufacturers have been doing this for a while. However some manufacturers have a bunch of false positives so most results on Google with this feature and BYD is about how to turn it off. So for me the big question is... Does it work better than the competition?

Definitely not Keep Summer Stoked About, Like, The General Vibe, And Stuff mode.

The cabin camera's main job is to monitor the driver. It has blind spots, especially with rear facing car seats and behind the front seats. They could surely do a half-assed feature that only uses the camera, but it will have a million asterisks warning about them. Still, I do agree that 'something is better than nothing' as this is not something that should be relied on anyway.

There is a small bit of occlusion by the front seats, but theres enough gap to see someone’s back there. 3rd row would be the deal-breaker.

It does get annoying, very quick :P

Pretty sure Dog mode is a climate setting you have to turn on manually everytime… in the same area as Camp Mode and Keep On or whatever it’s called. You might be thinking of Cabin Overheat Protection which can be permanently on. That’ll keep the temperature in the car survivable (hopefully), not comfortable.

Can't wait for some morons on youtube testing it with a real child

I just hope it does more than trigger alerts as the article (and release notes?) suggests. Hopefully it also turns on the HVAC as well. Though, perhaps they want more data to ensure it is not having too many false-positive detections before turning that on.

About 5 years ago, in a town maybe a hour away from me, a very stressed out dad forgot his baby in his car during a hot summer day. He was sure he left the baby at the daycare (daycare was right across his work place), but he didn't. Came back to a dead child. If he had this feature back then, his kid would still be alive

How does it know it’s a child versus your wife who just refuses to go into the Best Buy with you?

Nope, it uses radar. Maybe exclusively, or maybe in concert with the rest of the tech, but yeah, cabin radar.

ITT people who have never had rear-facing car seats

Toyota does it using mmWave sensor in the ceiling. Pretty sweet. Apparently it can detect a heartbeat anywhere in the car. Even hiding in trunk

Most of the implementations e.g. toyota use imaging radar

Good questions, also curious if it would detect children in rear-facing car seats.

Yep, thats the exception for sure. If the car had weight sensors (and not just compression sensors) that would be easily solvable

> You might be thinking of Cabin Overheat Protection which can be permanently on. That’ll keep the temperature in the car survivable (hopefully), not comfortable. Yeah, Cabin Overheat Protection's lowest temp setting is 90 degrees (mine set to 100 degrees). Definitely could prevent the death of a child. While it only "protects" for 12 hours, hopefully no one accidentally leaves a child in the car for longer than that.

Humans are error prone, even the best of us.

would it work in this scenario? [https://www.reddit.com/r/funny/comments/1kxb295/lost\_child\_in\_uber/?utm\_source=share&utm\_medium=web3x&utm\_name=web3xcss&utm\_term=1&utm\_content=share\_button](https://www.reddit.com/r/funny/comments/1kxb295/lost_child_in_uber/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)

It uses the HD radar mounted near the autopilot cameras

I have a Lexus and it yells at me when I have groceries on the floor behind the driver's seat.

There is a heartbeat sensor, it's a subset of the interior radar's functionality.

Well yeah but that’s the point - how can they say cameras are fine for a much higher risk issue and use radar for a niche issue like this? Couldn’t they combine the camera with the pressure sensors in the seats and get 90% of the way there with a reminder when you exit that could be easily dismissed? It just seems odd

So is this only for the newer versions of the cars like the updated model 3 and Y?

This \^ (radar signatures)

Read the article? Model Y (2022+) Model 3 (2024+) Cybertruck Model S and Model X (2021+)

Oh nice, I thought I had read before the radar was just in the new model Y. Or did they update that radar again or something? Can't remember

Specifically (I have experience in radar), mmWave radar is a fine enough wavelength when combined with a coherent transceiver for reliable phase processing you can bounce radar waves around the cabin and detect the very small rhythmic breathing movements of a child's lungs (we're talking movement distances defined in tenths of millimeters). Some vehicles use camera detection systems, but the radar systems are looking for signs of breathing taking place. The advantage is radar will detect even obscured occupants, such as in a rear-facing child seat. Or covered by a blanket. Texas Instruments, Micron, and Acconeer all make radars that can do this. Typically 60-90 Ghz frequency. They cost less than $20

Radar has been installed since 2022 as stated in the article. Only just became activated in a recent software update, and now has more features in this update

I wonder how this will work when I toggle camp or dog mode and walk away from the car on purpose for a few moments.

Oh gawd. 😂

Or in camp mode.

“What’s up guys?! Today we’re leaving Billie behind in the hot Arizona desert!! Like and share for more amazing content like this!!”

No it wouldn’t, you can’t tell the difference between a bag and a tiny human just by weight alone so a weight sensor isn’t going to be enough. Tesla claims they’ll be using their “4D radar” (whatever that means) to detect micro movements that could allow it to detect the difference between breathing and a gym bag.

How new does a Model Y have to be to have the interior radar?

The article says: * Model Y (2022+) * Model 3 (2024+) * Cybertruck * Model S and Model X (2021+)

Weight/time can tell us tons of information, especially when coupled with cameras. Person approaches car with baby-related vehicles like strollers etc. then the seat (not these since they are likely pressure-only) could detect the weight change and assume a baby is present. The driver also taps the carseat button when shown which further informs the system (and could even act as pseudo-tare. This is literally not that difficult to do. The 4D radar will be much more precise, but there’s no reason not to integrate this with non-radar cars. Even with pressure-only seats, the cameras could help

Radar can detect breathing/heartbeat of an infant in a rear facing car seat with a blanket over it. And that example is one of the main safety concerns.

I’m kind of dreading this because I turn on the carseat thing to disable incessant seatbelt notifications for my dog or when someone leaves a purse or bag in the backseat. All for child safely but there really needs to be a way to turn off those notifications deliberately

"Oh my gawd, I'm not a dog" -- teenager

I don't think anyone is planning on "relying on" any detection system to remember their kids for them..   The camera plus seat weight sensor, plus audio would probably work for 90% of dangerous scenarios.  They are all sensors that exist in existing models .  So on the 0.01% chance you accidentally left your kids in the car, id say that a 90% chance the car tells you about it is a hell of a lot better than 0%

Highly likely it’s using the interior millimeter-wave radar to bounce around inside the cabin for precisely that— in rear-facing seats or under blankets

Man are those some fresh steaks.

I don't really see what the issue with that is. Do children in the US explode if you leave them in a car for 3 minutes?

Be great if we can turn it off so my backpack doesn’t set the thing off. Absolutely WILD that we need this kinda stuff so that parents…get this…don’t forget their FREAKING kids in the car.

Wow that's cool, I hope they produce video showcasing how it works.

You can shame people all you want, but even normal people fall victim to this all the time. Humans are error-prone and when there's a sudden change in routine, stress from work or something, and a time crunch, people make mistakes.

No no, I mean they said the radar works THROUGH the seats from the front of the cabin, like as if the seats are see-through. I worded it poorly

I didn’t mean the seats detect the heartbeat😔

There’s a heartbeat sensor, it’s above the rearview mirror, which is what we are talking about lol

Ah thanks for clarifying! With radar it can bounces around and report back via frequency changes (like doppler shifts) so can detect small heartbeat movements on a chest via those bounces (less accurately). It can, as you said, also go through properly-constructed seats - which is badass.

Those have an interior camera.

I’m not shaming, I am just disappointed.

First responder here. Thankfully I have never had to respond to one of these calls. But we did have a child fatality in a hot vehicle years ago, I was off duty. The kids were playing hide and seek and one of the kids hid inside a vehicle and unfortunately passed away. It’s not always stupid parents.

Is it though? It should stop beeping at me anytime I have my backpack or gallon jug of water on the passenger seat.

But how do they decifer a child vs a adult? What if people are short?

A lot of parents don't do it intentionally. It has literally happened to people of all backgrounds. There was an article a few years ago about a dad who drove to the daycare. He took a call and then drove to work, he then went back to the daycare to pick up his child, not realizing the child was left in the car all day. https://archive.is/2022.08.28-153824/https://www.washingtonpost.com/lifestyle/magazine/fatal-distraction-forgetting-a-child-in-thebackseat-of-a-car-is-a-horrifying-mistake-is-it-a-crime/2014/06/16/8ae0fe3a-f580-11e3-a3a5-42be35962a52_story.html

Uses the cabin radar in newer Teslas.

They don’t use it for that, unfortunately.

another great feature from tesla

No, those have interior radar. The ones that have an interior camera go back even further.

It is pretty badass, and when they said some legacy Model Y’s already had the hardware I thought that was pretty sick

When you look at the number of model years that have the hardware you have to assume this was put in orginally for Robotaxi use, I'd assume the child safety feature was a more recent alternate use for the hardware. vehicles equipped with Tesla’s latest in-cabin radar technology, which includes: * Model Y (2022+) * Model 3 (2024+) * Cybertruck * Model S and Model X (2021+) Why have the hardware for all these years to just now add the feature that uses it?

Elon's kids' in shambles.

Tesla does this a lot. They shipped cabin cameras that went unused for years before using them for driver attention monitoring to allow hands-free driving. They also shipped matrix headlights that went unused for years, but recently updated them to enable adaptive headlight functionality. Older Teslas also had exterior cameras that went unused for years until FSD was made available to the public.

They seem to do. You should easily be able to google one of the cases of "CPD fines woman for leaving her 10-year-old alone at home for an hour at night". Children are seen as completely incapable of existing without constant adult supervision over there.

Or, and hear me out, we just use radar! Going to get a lot of false positives your way, which leads to systems being turned off and then they have no benefit.

> how can they say cameras are fine for a much higher risk issue and use radar for a niche issue like this? Because the camera is literally positioned such that the face of the driver is visible. You cannot see a baby in a rear-facing child seat from the camera. You cannot see through a blanket with a camera. There are so many ways that radar is better.

Your bag doesn't breathe, so it's not going to trigger a false warning. And if you're leaving dog mode on for your dog, ostensibly your car isn't then going to trigger a warning to you stating you left a dog in your car....

> get this…don’t forget their FREAKING kids in the car. You're clearly not a parent.

No, but I was however a kid and fortunately my parents never left me in the back of a car. To make excuses for parents who do is absolutely insane BUT we live in the era of no accountability so it is what it is.

Yeah I am not against the radar, i m saying there are completely valid options for the cars that will never get one.

Tesla is incredible with including features on past vehicles via software updates, but at some point there has to be a cutoff. This update is going to work on cars many years old (as far back as 2021 Model S/X), and investing significant amounts of resources into creating the system you've outlined, which I think is replete with issues that you don't see unfortunately, to bring features to cars even older than that is just not really a great use. With vehicle attrition, investing into those older vehicles is very much diminishing returns compared to focusing on new safety improvements in new vehicles.

Where in the article does it say that it’s detecting breathing? I’m pretty sure this is going to be based on carseat mode, which is when you designate that there is a heavy item in the back seats so that the fasten seatbelt alert doesn’t keep activating. A lot of people turn this on so that the car doesn’t keep giving you a fasten seatbelt warning if you have a heavy item like a dog or backpack in the back seat. Of course Im going to use dog mode if my dog is in the car, but if I have workout gear in the back it sounds like now the car is going to start honking and alerting everyone that I left my yoga bag in the car. I’m all for child safety if it helps save a kid but I hope it’s configurable in settings for people like me who don’t have kids and already know to leave dog mode on when the pup is in the car

Only part of 2022. I have 2022 y and I’m pretty sure mine doesn’t have the radar

> I’m pretty sure this is going to be based on carseat mode That is absolutely, positively not what the article says, nor what is actually going to happen. The car will use radar inside the cabin to detect minute movements, such as breathing, to determine if there is a living creature left inside.

Once again, you're clearly not a parent. You think it's intentional? Have you ever driven to work one day and when you pulled into the parking lot been unable to remember most of the drive? Or how about you're driving home and need to stop at the grocery store, but remember only after you've gotten home? Or walked into another room and forgotten why you walked into that room? A slight change in routine, being slightly distracted going past daycare/school, child falling asleep in the car or just being really quiet, etc. It can be a very innocuous event that causes you to forget. I briefly forgot my daughter in my truck about 3 years ago. I don't normally drive my truck, and especially with her in my truck, but I needed to go to the hardware store while my wife was at work and I was solely in charge of my daughter, so I took her car seat from my car and put it in my truck to take her with me. When we got back to my house, I parked in my circle drive with her side of the truck (passenger side) facing away from the front of my house. I opened her door to get her out, but she had fallen asleep (it was around nap time). Given that I could never transfer her from her car seat to her crib and keep her asleep, I decided to let her sleep in the car seat a few more minutes while I unloaded everything from my truck. Some of the items were in the cab, which I grabbed then, the rest were in the bed on driver's side. I left her door open while I did a few trips inside carrying the stuff from the bed (all smaller items I grabbed from over the driver's side of the bed). All this time I had been mentally working through how I was tackling my project, and when I got inside with the last items, I went to work. Maybe 15 minutes later I suddenly remembered she was still in her car seat in my truck. I sprinted out to the truck and she was still contentedly sleeping with the door open. The truck was in the shade of a big tree, mid-70's, partly cloudy, light breeze - literally perfect outdoor napping conditions and zero harm had come to her. I scooped her out of her car seat, held her to me, and started sobbing. I'm a grown man, I have a doctorate education, I own a successful business, I am literally trusted with life and death in my profession, and yet I forgot my young daughter in my truck. It was brief and she was fine, but it can happen to anyone.

I just dont agree with making excuses for parents is all. Sht happens I get it and I just hope I’m able to toggle that feature off should it become an issue for me.

They need it as it’s annoyingly difficult to keep the window cracked when you shut the door. Keeps auto-rolling it up. I’ve been wondering about this- seems extremely unsafe.

As a regular dog mode user, and also parent of a teen who would rather sit in the car, I’ll be interested to see how this works.

This is incredible. Thanks for the information.

i mean…ethics? just because a kid can tolerate a hot car for a few minutes doesn’t mean they need to

Who said hot car?

It’s never detected any of the people I’ve had in my trunk

> I just dont agree with making excuses for parents is all. No one is "making excuses" in the sense of shirking responsibility. I, and others, have given an explanation of how easily it can happen, despite you thinking "I would never do that." I literally outlined the situation of how it happened to me. I broke down in tears sobbing while holding my daughter at the thought of what I, and I alone, had done. No excuses to absolve myself of blame, just purely my mistake. In hindsight I was able to walk through the steps (as I outlined above) to see how it happened, but it wasn't to shirk my responsibility to my actions, it was to understand what I did and how easily it could occur and what I needed to do in the future to ensure I never did it again. > Sht happens I get it and I just hope I’m able to toggle that feature off should it become an issue for me. Unless your backpack has a heart beat or is breathing, you can rest easy knowing that you're not going to be inconvenienced due to the implementation of a child's life-saving safety feature.

Very good. This was probably an easy addition. My 25lb dog bouncing around in the backseat already trips the seat belt sensors constantly.

Wait... Didn't it already have this? I have gotten alerts when there is someone in the back or large items, heck if I leave a seat belt buckled, i get an alert to check the backseat when I park. Or it this a refinement / improvement of that?

Hot car is essentially the main use case of this feature. That’s what kills kids, pets, old people left in cars

I sure hope this doesn’t rely on weight sensors and ding at me for weighted backpacks etc in the backseat.

yeah i was thinking the same about the hvac. there might not be any settings for it so that its not taken advantage of. typically ac turning on is some sort of setting the user chooses to do.

i don’t understand why people use dog mode. just use “keep” and the screen is accessible.

To be fair, they need to be living.

Nearly lost both our kids to this. They decided to play hide and seek from us. My wife and I were at different ends of the house. Each thought the other one had the kids. After a panicked search of the house, yard, and nearby yards, we checked the trunk. Hot, sweaty, but still breathing. They had another 15 minutes to live, maybe.

Can’t wait for this to trigger on my dogs in dog mode.

Well, for one, dog mode has an explicit message on the screen that shows humans in large letters what the temperature inside is and says that the owners will be back and they are safe. It doesn’t do that with climate keep, so some random person who is walking by might smash the window out of your car to “save” your dog that didn’t need saving. Use dog mode when there’s a dog in the car. Use keep when there isn’t. Super simple.

You can check this is service mode

i get that for a dog but they’re talking about when you leave a person in a car (example was a teenager).

It’s for the same reason. So a passerby doesn’t break the windows and try to save your child.

never occurred to me someone is in danger while sitting in a car.

> Specifically (I have experience in radar), mmWave radar is a fine enough wavelength when combined with a coherent transceiver for reliable phase processing you can bounce radar waves around the cabin and detect the very small rhythmic breathing movements of a child’s lungs (we’re talking movement distances defined in tenths of millimeters). Can you translate that into English?

Yes, but isn’t this feature always active! Or did they program it to work only when outside temps are high?

Think hard about it for a few seconds. A camera that physically cannot see a child in the backseats is completely useless. It’s like using a camera for FSD that’s facing the car’s undercarriage.

Congrats, you’re not an idiot. A lot of people are much dumber than that.

Think hard about it for a few seconds. My point is that it's a very niche problem to bother putting a radar in for when they stubbornly refuse to use radar for a much more common and bigger issue like FSD. I obviously understand the limitations...

They probably plan on using it for more than just that. Actually, now that I think about it, it’d be perfect for robotaxis since no one will in the car to monitor.

i feel accomplished

Cars can still be hot in mild outdoor temperatures through the greenhouse effect. Plus you also shouldn’t be leaving a child in a car regardless for multiple other reasons.

I’m talking about somebody testing the system. If they do it in their garage or driveway while it’s 40 or 50° outside there’s no risk of harm.

It doesn’t have to be a hot car to test the feature. Are you reading what you’re replying to?

Baby make little movements invisible to eye, radar detect. Send notice.

Annoying as hell. Weight in backseat detected. Alarm! We dont have kids. Please let us disable it for good!

Agree. My alarm goes off due to two childseats in the back.