It's been a while since HW3 owners have received a new FSD update, with the latest update coming with FSD version 12.5.4.2. While this version added vision-based attention monitoring with sunglasses, it’s still far behind the latest features available on FSD v13.2.1.
Tesla shared their FSD roadmap twice in the past few months, but HW3 was mostly left out, except for a single bullet point that stated there would be improved V12.5.x AI models for city driving.
We’ve recently seen HW4 vehicles receive much larger AI models, camera improvements that include processing video feeds at full resolution and 36 FPS, and much more. FSD V13 also gained features such as the ability to reverse and start FSD from park, amongst others.
It’s clear that HW3 is not powerful enough to run these latest FSD models, but HW3 owners are right to feel left out and disappointed with Tesla selling vehicles with HW3 up through the middle of 2023. Elon Musk has stated that Tesla will upgrade HW3 cars if needed, but are left in the dark in terms of what the upgrade will be and when it’ll become available.
Since that comment from Musk and Tesla’s updated roadmap in late October, Tesla hasn’t shared any additional news on HW3, until now.
Ashok Elluswamy, VP of AI at Tesla, has confirmed on X that an FSD update for HW3 owners is coming before the end of the year. Putting aside the 2 weeks joke, he did confirm that FSD V12.6 will be on its way for HW3 vehicles by the end of the year - which just happens to be about 2 weeks away.
FSD V12.6
WholeMarsBlog on X
It seems that the V12.6 build will be unique to Hardware 3 - as there haven’t been any builds with that FSD version yet. The closest build that we have to look at is FSD V12.5.6.4, which only went out to HW4 vehicles. We expect FSD V12.6 to include everything in 12.5.6.4 with possibly some additions.
FSD V12.5.6 brought a lot of improvements. We covered all of the features in FSD 12.5.6 previously, if you want a detailed breakdown and photos of all the features. However, here’s a high level overview of everything that version included:
Better and More Natural Lane Change Decisions
Updated Speed Profiles, including Hurry Mode
Auto Speed Changes
End-to-End Highway Stack
Audio Data Collection
These changes greatly improved FSD on HW4, so we’ll have to wait and see if they provide similar improvements for HW3 vehicles. The more natural decisions should improve overall smoothness and get rid of the jerky-wheel syndrome and green-light braking that has become synonymous with V12.5.4.2. Alongside better lane selection, this makes the entire experience much smoother and more fitting of Full Self Driving.
The updated speed profiles are applicable on both roads and highways (up to 50 mph with this version), which means you’ll get an updated Chill Mode (with Minimal Lane Changes), Standard Mode, and the new Hurry Mode, which is focused on driving faster and making more frequent lane changes.
Auto Speed has also been removed in favor of Max Speed, which will let you define an overall max while letting FSD still pick its overall speed up to that maximum set speed. You can adjust the hard max by using your scroll wheel to slow down or speed up the vehicle.
However, the biggest feature in this update is the new End-to-End Highway Stack, which finally brings the benefits of FSD V12 on city streets to highway driving.
The final feature that we’re expecting in FSD V12.6 is the ability to collect audio data to begin training for hearing emergency vehicles. This one will be big and it’s what will make FSD feel very human-like. Tesla is starting off with detecting emergency vehicles, but you can expect them to start detecting much more than that soon.
Tesla hints at that in their release notes, saying that audio sharing will be used for features such as emergency vehicle detection. Expect FSD to react to more in the future, such as vehicles honking or someone yelling. Tesla also said that they’ll be looking to have the vehicle honk when needed.
Why FSD 12.6
It’s interesting that Tesla is choosing to name this version FSD 12.6 instead of FSD 12.5.6.x, like they’ve done in the past. This points at some additional improvements being included, but it’s not clear what they could be. Could Tesla bring down some improvements from FSD V13, or add some features such as the ability to reverse?
Tesla may want to stay away from the FSD V13 name if the HW3 version isn’t going to perform as well as FSD V13 on HW4, but at the same time, they could simplify some FSD V13 features and make them available for HW3 owners.
What’s in FSD V13
Let’s take a quick look at all the features in FSD V13 that weren’t in FSD 12.5.6.x. FSD V13 includes significant improvements to the FSD model that just won’t fit into HW3 that are likely responsible the the smoothness seen in FSD V13. This includes a much larger model, full camera resolution, higher frame rates, and more, but FSD V13 also includes these additional features:
Speed Profiles on both City Streets and Highways (available on all roads and speeds)
Integrated unpark, reverse, and park capabilities
Start FSD from Park
Improved reward predictions for collision avoidance
Improved camera cleaning
Redesigned controller for smoother, more accurate tracking
Dynamic routing around road closures, which displays them along an affected route when they are detected by the fleet
While the larger model of FSD V13 is not expected to be available for HW3 vehicles, some of these other features have the possibility of making the cut in V12.6.
Legacy Vehicles
There’s no news on Model S and Model X legacy vehicles with MCU 1 receiving the same update just yet. Teslas with MCU 1 did receive FSD V12.3.6 on update 2024.26.3.1, but we haven’t seen anything indicating there will be another update coming soon. However, getting FSD 12.6 out for HW3 with MCU 2 could be the precursor to it becoming available for older MCU 1 vehicles.
We’re super excited to hear Tesla talking about HW3 vehicles and that an update is coming in just a couple of weeks. While it’s not FSD V13, it could provide massive improvements until a hardware upgrade becomes available for HW3 owners.
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Tesla’s Dan W Priestley attended the Advanced Clean Transportation (ACT) Expo in Anaheim, California, and provided an update on Tesla’s Semi truck program. The presentation covered several key developments on the status of Tesla’s Nevada Semi Factory, refinements to the Semi, and Tesla’s plans for charging and ramping production through 2026.
Let’s dig in and take a look at everything that was captured by the Out of Spec team at ACT Expo. The original video is embedded below if you’d like to watch it.
Semi Factory & Production Ramp
Priestley reaffirmed the timelines mentioned during Tesla’s Q4 2024 Earnings Call that Tesla will scale Semi production in 2026. To achieve this, Tesla has been actively building and expanding the Gigafactory Nevada site, specifically to support the production of the Tesla Semi. The dedicated Semi facility will have a targeted annual capacity of 50,000 Semi trucks.
Following the beginning of production, Tesla will utilize the initial trucks to integrate into its own logistics operations. This will serve as both a final real-world testing ground as well as an opportunity for Tesla to gather data internally. Tesla plans to begin subsequent customer deliveries throughout 2026 as the ramp-up continues.
Reuters also reported that Tesla is hiring over 1,000 new employees at the Semi Factory to begin the rapid ramping of the program.
Semi has already amassed 7.9 million miles with Tesla’s current testing and operational fleets, providing some real-world data and testing. Feedback for the truck has been exceptionally successful, with many drivers praising the Semi’s performance and comfort.
New Tesla Semi Features
Of course, it wouldn’t be a Tesla keynote without showing off some new things. The Semi will be available in 500-mile and 300-mile range configurations, now featuring updated mirror designs and a drop-down glass section to improve visibility and allow easier interaction with external elements—such as control panels at ports, for example.
New Electric Power Take-Off (e-PTO)
The Tesla Semi will also feature a new capability called Electric Power Take-Off, or e-PTO system. Similar to the PTO systems found on other vehicles, this will allow the Semi’s high-voltage battery to power auxiliary equipment at variable voltages. That includes being able to power things like climate-controlled reefer trailers, potentially replacing the noisy and polluting diesel generators traditionally used for this purpose.
Charging and Batteries
Out of Spec BITS/YouTube
Tesla is also working on an updated battery pack design for the final production design of the Semi. This new pack is designed to be more cost-effective to manufacture. The battery pack itself is slightly smaller than before, but the truck maintains the same level of range through efficiencies. Dan also confirmed during his keynote that the battery cells for the Semi will be sourced domestically inside the United States, helping to alleviate potential burdens due to tariffs.
On the charging front, Tesla is using MCS - the Megawatt Charging System - capable of 1.2MW - and designed specifically for Semi. The system uses the same V4 charging hardware found at Supercharger sites but focuses on that larger power output. Alongside a smaller physical footprint, Tesla will be able to configure these V4 cabinets for either dedicated Semi charging or for shared power scenarios with regular Superchargers. Tesla is also working on an integrated overnight charging product, but Tesla isn’t ready to talk about it yet.
46 Semi Charger Sites Coming
The 46 new MCS sites coming soon.
Out of Spec BITS/YouTube
Finally, Tesla has made substantial investments in a public charging network for the Semi. There are currently 46 sites in progress throughout the United States, and plans for significant expansion throughout 2026 and 2027. These sites are strategically located alongside major truck routes and within industrial areas to support long-haul and regional operations. Tesla is aiming to offer the lowest possible energy costs to operators to help incentivize adoption.
This was one of the best updates to the Tesla Semi we’ve received since its initial unveiling. It seems that the Semi will receive a big portion of Tesla’s attention in 2026, while Robotaxi and FSD Unsupervised take the stage this year.
The Tesla Semi has the potential to transform transportation even more dramatically than EVs already have, serving as a testament to Tesla’s mission to electrify the world.
Sentry Mode is an invaluable tool for owners - capable of keeping the vehicle safe and secure even when you’re not around. This is especially true in recent times, with the misguided and unfortunate incidents surrounding Tesla ownership, including damage to Tesla vehicles, showrooms, and Superchargers.
B-pillar Camera Recording and Dashcam Viewer
With the 2025 Spring Update on 2025.14, Tesla is expanding Sentry Mode’s functionality for certain vehicles with some much-needed changes. Sentry Mode and Dashcam can now record footage from the vehicle’s B-pillar cameras. These cameras are located on the side pillars of the vehicle, between the front and rear doors.
This adds two crucially needed viewpoints, making Tesla’s Sentry Mode a truly 360-degree security system. These cameras also provide the best angles for capturing license plates when parked, so they will be greatly appreciated by owners in the event of an incident.
These vehicles are also receiving an improved Dashcam Viewer, which now displays the six camera feeds along the bottom and a new grid view. It also allows users to jump back or forward in the video in 15-second increments.
However, to the disappointment of many owners, not all vehicles are receiving these updates due to the additional processing power needed.
Limited to Hardware 4 Vehicles, Ryzen Isn’t Enough
We have confirmed that Tesla is only adding the additional camera recording and improved Dashcam Viewer on hardware 4 (HW4 / AI4) vehicles. The newer hardware presumably has the additional processing power and bandwidth needed to handle recording and saving the two additional video streams during Sentry Mode and Dashcam.
For the time being, owners of HW3 vehicles are not receiving this feature. This includes all vehicles with HW3, even those with AMD Ryzen infotainment systems. If you’re not sure whether your vehicle has HW3 or HW4, you can refer to our FSD hardware guide.
While there’s no doubt that recording two additional camera streams would be more computationally intensive, we hope that Tesla adds the improved Dashcam Viewer to HW3 vehicles in a future update.
Cybertruck Also Missing Improved Sentry Mode
Surprisingly, and most confusing for many - is the fact that the Cybertruck is also not receiving the improved Dashcam Viewer and B-pillar camera recording with this update. This struck us as odd, especially since the Cybertruck is currently the only vehicle with the improved, more efficient version of Sentry Mode.
Every Cybertruck is equipped with HW4 and AMD Ryzen infotainment units, so this clearly isn’t a hardware restriction. It’s possible the more efficient Sentry Mode is playing a role here due to the infrastructure changes. However, we expect Tesla to address this in a future update and eventually release these features for the Cybertruck as well.
Given the Cybertruck’s high visibility and its status as a frequent target for both positive and negative attention, many owners hoped that the Cybertruck would be one of the vehicles to receive this feature.
Adaptive Headlights
Tesla finally started rolling out its adaptive headlights in North America. While the new Model Y already came with the feature when it was released last month, other vehicles with matrix headlights are now receiving the feature in the Spring Update.
All vehicles with matrix headlights are receiving this feature, which includes the new and old Model 3, first-gen Model Y, and the new Model S and Model X.
If you’re not sure if your vehicle includes matrix headlights, check out our guide. What’s interesting here is that older vehicles that were retrofitted with matrix headlights due to an accident or user replacement are also receiving the adaptive headlights feature.
Legacy Model S & Model X
As with most updates, the older legacy Model S and Model X are not receiving all the features included in this update. Unfortunately, some of the features, which include the Blind Spot Camera on the instrument cluster, Save Trunk Height Based on Location and Keep Accessory Power On are limited to the new Model S and X.
Legacy S and X models will receive the Alternative Trip Plans feature, Avoid Highways (Requires Intel MCU) and the Keyboard Languages feature.
These vehicles are also receiving all the features in the Minor Updates section except for the visualization showing how far the door is opened, which is exclusive to the Cybertruck. These additions include improved music search results, contact photos in the phone app, automatic connecting to hotspots, the ability to show third-party chargers, view Supercharger amenities, and various improvements to music services.
While many users will be disappointed not to receive the B-pillar camera recording and Dashcam Viewer improvements, it’s important to remember that Tesla typically does a great job at bringing features to older vehicles, at least with the Model 3 and Model Y. If a feature isn’t added, it’s usually due to a hardware limitation.
![Tesla Semi Keynote: New Features, 46 Charging Sites, Upgraded Battery & More [VIDEO]](https://www.notateslaapp.com/img/containers/article_images/semi/semi-new-features.jpg/c7df4e0d32f8cb0beee080ad201e943b/semi-new-features.jpg)
