Tesla recently started rolling out an update that enabled the cabin radar in recent Model Ys and added support for first-row cabin sensing. This functionality not only lets Tesla replace the seat occupancy sensors in the front seats but also gives them a better idea of the size of the passengers — critical information when an accident occurs.
However, Tesla has now revealed that it won’t just be recent versions of Model Y that will receive these updates. Other recent vehicles also have a dormant in-cabin radar that will be activated in a future update.
Child Presence Detection
This front-row occupant sensing is only half of the update. Tesla also plans to add support to the rear seats that will let it detect occupants left in the vehicle. In a post on X, Tesla stated that at least 37 children die per year from heatstroke, just in the United States, according to the NHTSA. Tesla’s cabin radar will help reduce the number of deaths by detecting children left in the vehicle and alerting the owner or turning on the HVAC system.
The new radar has several safety-focused features, and they’re all designed to help protect someone left behind in a vehicle. First up - the radar will detect and classify passenger sizes to determine which airbags to deploy dynamically, helping to reduce injuries from shorter individuals sitting up front.
Additionally, the radar can differentiate an adult from a child or baby - and automatically and dynamically make the necessary safety adjustments on the fly. Tesla will also be able to detect heart rate and breathing through the radar - and has a series of safety steps it can take from here.
If a child or baby is detected being left behind in the vehicle, the Tesla app will immediately notify you and turn on the HVAC system to ensure their safety. In the case of an emergency, the vehicle will automatically call emergency services and report its location.
As a reminder, while Tesla vehicles outside of the United States support eCall, vehicles within the US cannot call 911 unless a phone is connected to the vehicle via Bluetooth. We hope that Tesla looks to add similar capabilities in North America to improve safety capabilities.
Supported Models
Although the cabin radar has only been activated in Model Ys produced in the last couple of years, Tesla said in their post on X that the radar is also available in recent Model 3s and the Cybertruck.
We did a little digging and confirmed that the part numbers for the cabin radar are the same for the 2024+ Model Y, 2024+ (new) Model 3, and the Cybertruck. So, these vehicles should also receive the latest cabin radar features.
Although the 2023 Model Y features a different part number, 2022 and 2023 Model Ys have also been receiving the front-row cabin sensing feature in Tesla’s 2025.2.6 update, but it is less clear whether they’ll receive the rear seats update later this year. The Model S and Model X also include a cabin radar, but the part number also differs from the cabin radar for the 2024 Model 3 and Model Y.
While the new Model Y isn’t available to check against on Tesla’s Electronic Parts Catalog, it looks like Tesla has been shipping the new 4D cabin radar in at least the 2024+ versions of their Model 3, Model Y and Cybertruck.
We expect rear-seat sensing to arrive on vehicles with the latest cabin radar later this year, while it’s unclear whether the other vehicles with the older cabin radar will receive it.
Tesla mentioned that rear-seat support will arrive in Q3 2025 for the refreshed Model Y. Based on the different interior sizes and spaces, sensor calibration and testing for other models may come slightly later.
Alongside the major expansion of the Robotaxi Network service area in Austin, Tesla has also rolled out a fairly significant upgrade to the Robotaxi app, helping address user feedback with more quality-of-life features.
These updates are primarily focused on polishing the user experience, helping to make the process of hailing and completing a ride smoother and more intuitive. For now, the app is still available to early-access users only.
Tesla has added three key features to this update, and while they aren’t as exciting as a public FSD update, they’re still a good step towards a better Robotaxi experience for everyone.
Walking Directions
First up is that the Robotaxi app now provides walking directions to your selected pickup point. Since pickups aren’t exactly at your location, this makes it easier to get to your designated pickup area. The previous Robotaxi app update added the ability to change your pickup location, but with directions now to your pickup spot, you now have a clean overview of your entire route, the walking and car portion.
Edit Destination
Next is in-trip destination editing. Things change, and sometimes your destination can change too. Now, the Robotaxi app supports the ability to change the trip destination after booking has already been completed. Having the flexibility to change destinations is important, as it helps bring the experience of Robotaxi closer to traditional taxi and ride-hailing platforms.
Destination Closing Soon
Finally, the app now checks the opening hours of your intended destination, much like the in-car navigation does. If your destination is closed or will be closed shortly after your estimated arrival time, the app will now make this clear when you’re selecting a destination.
This screen shot shows the new @robotaxi app addition of information about your destination, particularly if the location is closed and when it will open!
The last item in Tesla’s release notes for this update is that the Robotaxi service area is now larger, covering approximately 42 square miles, up from the previous service area of about 19 square miles.
This Robotaxi app update is version 25.7.5 and Tesla’s official release notes state:
Extends to a larger service area
Walking directions to pickup and your final destination
Search results show if a destination closes near arrival time
Edit your destination after booking
This is the second update to the Robotaxi app. As Tesla expands its operational footprint and adds more vehicles and more users, these improvements to the app will be ever more necessary.
To show off its scalability, Tesla has officially launched its first major expansion of its Robotaxi service area in Austin, Texas. The expansion comes just 22 days after the program’s initial public launch.
That’s a stunningly quick pace that sets a benchmark for how fast we’ll be expecting Tesla to roll out additional expansions as they validate and safety-check in additional area and cities. The new geofence not only adds a significant amount of new territory, but also makes Tesla’s service area in Austin approximately 4 miles larger than Waymo’s.
The expansion, which went live for users in the early access program earlier today, reshapes the map into… what we can call an upside-down T (Tesla logo meaning), but it’s open to interpretation. It helps connect more parts of the city, and increases the service area by more than double.
So far, the initial launch has been operating without any significant issues, which means Tesla is ready and willing to continue expanding the program.
Rapid Scaling
While the larger map is a clear win for early-access users and especially those who live in Austin, the most significant aspect here is just how fast Tesla is going. Achieving a major expansion in just over three weeks since its initial launch is a testament to Tesla’s generalized autonomy approach with vision only.
Unlike methods that require intensive, street-by-street HD mapping that can take months or even years just to expand to a few new streets, Tesla’s strategy is built for this type of speed.
This is Tesla’s key advantage - it can leverage its massive fleet and AI to build a generalized, easily-applicable understanding of the world. Expanding to a new area becomes less about building a brand-new, high-definition map of every street light and obstacle, but instead a targeted safety validation process.
Tesla can deploy a fleet of validation vehicles to intensely focus on one zone, allowing the neural nets to learn the quirks of that area’s intersections and traffic flows. Once a high level of safety and reliability is demonstrated, Tesla can simply just redraw the geofence.
Geofence Size
Tesla went from approximately 19.7 sq mi (51 sq km) to 42.07 sq mi (109 sq km)in just 22 days, following the initial launch and safety validation. Within a few short days of launch, we began seeing the first Tesla engineering validation vehicles, hitting Austin’s downtown core, preparing for the next phase.
The larger footprint means more utility for riders, and that’s big, especially since the new service area is approximately four square miles larger than Waymo’s established operational zone in the city.
Highways and Fleet Size
The new territory enables longer and more practical trips, with the longest trip at tip-to-tip taking about 42 minutes from the southern edge of the old geofence to the northern edge of the new geofence. For now, Tesla has limited its fleet to operating exclusively on surface streets and does not use highways to complete its routes.
We also don’t know if Tesla has increased the vehicle fleet size quite yet - but if they’re intending to maintain or reduce wait times for even the early-access riders, the fleet size will easily need to be doubled to keep up with the new area.
This video clip shows the @robotaxi follows the Interstate (I-35) but does not take the highest.
Perhaps the most telling bit about how fast Tesla is expanding is that they’re already laying the groundwork for the next expansion. Validation vehicles have been spotted operating in Kyle, Texas, approximately 20 miles south of the geofence’s southern border.
Robotaxi Validation vehicles operating in Kyle, Texas.
Financial_Weight_989 on Reddit
This means that while one expansion is being rolled out to the public, Tesla is already having its engineering and validation teams work on the next expansion. That relentless pace means that if this keeps up, Tesla will likely have a good portion of the Austin metropolitan area - the zone they’ve applied for their Autonomy license for - serviceable by the end of 2025.
The pilot? A success. The first expansion? Done. The second expansion? Already in progress. Robotaxi is going to go places, and the next question won't be about whether the network is going to grow. Instead, the new questions are: How fast, and where next?
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