News and rumors have been heating up about Tesla's upcoming FSD hardware 4.0. Now, thanks to @GreenTheOnly, we have our first look at Tesla's latest FSD hardware, version 4.0.
The new hardware will not only include a faster computer and higher resolution cameras but it will include HD radar, additional cameras and new camera placements.
Cameras
It's been rumored for a while now that Tesla will use upgraded camera sensors with increased resolution. We reported last year that these new cameras are also expected to have LED flicker mitigration that will aid in reading digital signs.
Tesla's current cameras produce 1.2 megapixels, and while we don't know for a fact what the updated resolution will be, numerous rumors have pointed at them having 5 megapixel sensors.
One of our sources says that while the increased resolution will be useful in certain scenarios, it won't be 'critical' because the higher resolution also comes with some downsides, such as more noise and will require additional processing power.
However, we expect that it will be useful in certain scenarios and Tesla may even be selective about when the increased resolution is used. The new cameras will also provide a better picture and will benefit non-FSD features such as Sentry Mode.
However, the increased resolution of the new cameras is only a small part of the upcoming camera changes.
Camera Placement
Tesla's hardware 4.0 features 12 camera connectors
@GreenTheOnly/Twitter
Tesla's hardware 4.0 has 12 camera connectors on board, with one being labeled spare. All current Teslas feature nine cameras in total. Three of them are forward-facing cameras and located underneath the windshield, two are on the fenders, two on the B-pillars, one in the rear and one for the cabin camera.
A leak last month revealed that Tesla plans to reduce the number of front-facing cameras to two, down from three. This is likely due to the higher-resolution cameras, making the third telephoto lens unnecessary.
That means there may be up to three additional cameras in hardware 4.0, or possibly four if you count the spare. According to Green, these three cameras appear to be destined for the vehicle's front bumper, although it's not clear in which direction they'll be aimed.
There have been various documented issues where Tesla has a blindspot when the vehicle is coming out of a secondary road that is obstructed by buildings or other objects. Having a camera that could look to the sides near the front of the vehicle would solve these situations, by giving it better than human vision since they'd be placed near the front of the vehicle.
FSD struggles with obstructed views like these
Cyber Owners/YouTube
According to the camera port names, it appears that Tesla may also be repositioning some of its cameras. The B-pillar cameras, which look forward, may be moved onto the vehicle's fenders to presumably help provide a better view as well.
Another leak last month revealed that Tesla is added a heater element to cameras in the B-pillar of the vehicle, which will help with fog build-up underneath the glass.
Processing Power
Hardware 4.0 was previously rumored to be about 2-4x faster than hardware 3.0. Some of this power will undoubtedly go toward processing the new camera feeds and additional pixels the new cameras are providing. However, the additional power is crucial given that hardware 3.0 is nearing its processing limit.
Green provided the specs from the new hardware's chips, revealing it contains 20 cores, up from 12, and it maxes out at 2.35 GHz. Green also talked about the number of TRIP cores increasing from two to three and maxing out at 2.2 GHz.
While the number of cores and its frequency don't reveal how powerful this new hardware may be, Green says that the new hardware has 'a lot less improvement than many hoped for.'
It's not clear how much faster hardware 4.0 will be compared to hardware 3, but it sounds like the improvement may be toward the lower limit of the 2-4x speed bump we were expecting.
The hardware specs provided are per node, with the board having two nodes, which are expected to be used for redundancy.
Redundancy
Tesla's FSD hardware 4.0 is uncovered
@GreenTheOnly/Twitter
When Tesla introduced hardware 3.0, they also built it for redundancy in case of emergencies. Each board was built with two identical nodes. Both nodes could compute the same data and compare the outputs, letting the vehicle know if there was an issue. If one node failed, the vehicle could also continue driving itself long enough to pull over safely.
However, as Tesla's processing requirements increased, redundancy was removed on hardware 3.0 so that Tesla could leverage the processing power of both nodes.
With hardware 4.0, Tesla has once again added redundancy into their hardware, not only in terms of chips and processing but power redundancy as well.
However, given this look at Tesla's latest FSD hardware, it all but confirms that Tesla has no plans to offer any sort of retrofit.
Hardware 4.0 is also much more than just a faster computer. The power draw is much higher on hardware 4.0 than on hardware 3. The form factor is also completely different and will not fit in a previous model without modifications.
Tesla's previous FSD hardware upgrades were either camera upgrades or a computer upgrade, both of which were easily swappable. However, the hardware 4.0 suite now includes additional cameras, new camera placements, a new computer form factor, and an HD radar, making a retrofit unrealistic in every way.
There may be hobbyists that will dedicate their time and money to retrofitting their vehicles, but that's as far as we expect retrofits to go. The time and money Tesla would spend on retrofitting a vehicle would not make 'economical sense.'
Radar
Tesla's hardware 4.0 package augments vision with an HD radar.
Tesla started removing radar from their vehicles in 2021 with the Model 3 and Model Y. They later removed radar from their Model S and Model X vehicles as well in favor of a vision-only system.
However, with hardware 4.0, Tesla is reintroduced radar with a high-definition radar named Phoenix. HD radar is a step up from traditional radar, letting Tesla more accurately create an image with radar alone.
With hardware 4.0 Tesla is also going the extra distance with protecting its sensors. Not only will some of the cameras contain heaters to prevent weather-related issues, but Tesla will include a heater for the radar as well.
The radar heater will prevent snow and ice from accumulating on the front of the vehicle and blocking the radar signals.
Power Consumption
Since hardware 4's chips are more powerful it isn't a big surprise that they also require additional power.
According to Green, hardware 3 consumed about 100 watts max, which is about the same as hardware 2.5. Hardware 3 was created with the same power restrictions as hardware 2.5 since it needed to be easily retrofitted.
However, since hardware 4.0 isn't going to be retrofitted, it didn't come with the same design restrictions. We don't know what hardware 4's max processing power is based on the information disclosed, but it will apparently idle at 80 watts, which is about double the idle power of hardware 3.
Which Models Will Have Hardware 4.0
Green believes that Tesla is producing Model S and Model X vehicles with hardware 4.0 now. However, Tesla is hanging on to them and they're not being delivered yet.
Tesla has their upcoming March 1st event titled Investor Day, where they may reveal hardware 4.0 to everyone. Possibly with a surprise announcement that all current vehicles contain hardware 4.0.
It's not clear whether the Model 3 and Model Y are currently being manufactured with the new hardware, the Model 3 and Y lines in China are currently paused for retooling which could be related to hardware 4.
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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)
