Tesla To Upgrade HW3 Cars If Needed: What To Expect

Not a Tesla App

At the Q3 2024 Investor Call, Elon Musk discussed the future of autonomy. One question that came up was what about FSD Hardware 3? Today, Hardware 3 has been lagging behind Hardware 4, now dubbed AI4.

Given what has been previously said at We, Robot, Elon and Tesla fully believed that autonomy - Unsupervised FSD and Robotaxi, would be possible on HW3. Now, that statement has been backtracked. Elon and Tesla’s top-notch engineers are no longer sure whether HW3 will be capable of meeting the expectations of a safe, autonomously driven vehicle.

With AI 5 entering into production in 2026, even AI4 has a short lease on production life. But what does that mean for HW3 vehicles today? Let’s dig in.

Tesla Will Upgrade HW3 If Needed

Elon has confirmed for the first time that if Tesla can not make autonomy work on HW3, they will upgrade the affected vehicles. That upgrade, of course, would be free for customers who purchased FSD on their HW3 vehicles. For the early Model 3 that came with Hardware 2.5, owners should also be able to get a free upgrade to newer hardware after they purchase FSD. Elon didn’t go into a lot of detail, but it’s not clear whether FSD subscribers would also get a free upgrade if needed, but it sounds like they would.

There are a few things to note here.

Elon didn’t provide a date for this potential future upgrade or any expectation of when HW3 will be officially considered legacy. Elon said that Tesla isn’t 100% sure whether FSD would be possible on HW3. Tesla’s approach to FSD will now be to make it work on HW4, then backport or find ways to make it work on HW3. At some point, it sounds like they may determine this to not be possible.

It’s in Tesla’s best interest financially to delay that decision as long as possible and instead move HW3 owners to AI4 or newer hardware through free FSD transfer opportunities.

However, if Tesla decides that HW3 doesn’t have enough compute power, there will always be a large number of vehicles that need to be upgraded. The Tesla drivetrain—motors and batteries—are built to last, and with less than 2% annual degradation being tracked by third parties, we can expect to see 2018 Model 3s still on the road in 2030 and beyond.

There is some chance that HW3 does not achieve a safety level that allows for unsupervised FSD

What’s the Upgrade?

Here’s the thing—Hardware 3 has lower-resolution cameras and uses a different wiring harness. AI4 and beyond use a unified harness and improved cameras. On the earnings call, Elon said that the upgrade would be an inference computer upgrade only.

That means better and faster processing and an improved FSD experience for users. It can also save Tesla money by having the AI team spend less time backporting FSD to HW3.

No Camera Upgrades

The unified wiring harness and the cameras in HW3 vehicles will remain since Tesla doesn’t see them hindering progress. The harness in HW3 vehicles isn’t capable of carrying more data or power, making upgrades to cameras or hardware difficult.

Tesla is already approaching autonomy-level capabilities on Hardware 3, so in their eyes, it's just a matter of improving the models and decision-making rather than increasing the raw pixel count coming in. According to Tesla, there will be no camera upgrades.

No Bumper Camera

We expect to see the front bumper camera added to more vehicles in the near future. The Cybercab and Cybertruck both already have front bumper cameras, while the Model Y Juniper Refresh has been seen with one as well. The Models S and X are also expecting a bumper camera whenever they get a refresh.

We’re not sure how much of an impact this will have on the robotaxi or Unsupervised FSD, but given that the refreshed Model 3 Highland didn’t come with the bumper camera last year alongside the Cybertruck, it may not be necessary.

HW 3.5 Upgrade

Many users are speculating that HW3 will be upgraded to HW4, but that is unlikely to be the case. As we mentioned, HW4 has a different wiring harness and cameras and those won’t easily fit into a HW3 vehicle due to space and power constraints.

Instead, Tesla will likely create a new inference chip and board made specifically for HW3 vehicles. It’ll need to be as powerful as HW4’s computer but much more efficient.

Tech progresses quickly, and what was once cutting-edge in 2017 is now left behind in the dust. So, this process of getting an HW4-capable computer working with the constraints of an HW3 vehicle will get easier the more time goes on. Tesla will likely start engineering the process in the future, using smaller transistors with a smaller process node, newer chipset-style processor designs, and overall better energy efficiency.

One thing to look out for is redundancy. This lets the FSD computer work on two separate chips, making sure they both reach the same conclusion before the vehicle acts on it. Redundancy helps with errors due to component failures, errors in processing or other issues. Hardware 3 was built with redundancy in mind, but Tesla has since removed it in order to use both nodes for processing power instead of redundancy. If and when Tesla releases the HW3 retrofit computer, it’ll be interesting to see if they include this back in.

When?

Right now, Tesla isn’t even sure whether an upgrade for HW3 will be needed. It sounds like that may be the case, but for now, Tesla isn’t for sure. They simply want to reassure owners that an upgrade will be available for HW3 if needed.

Tesla also doesn’t want to have to upgrade vehicles twice, so this upgrade will be the absolute last-ditch effort to get HW3 vehicles up to a safe level of autonomy. Even Tesla can’t be sure what it will take to completely solve autonomy yet, so they can’t build an upgrade until they know what it’ll take.

Don’t expect a HW3 upgrade before FSD is solved. Once Tesla knows the computing power and potentially other hardware required, then they can start thinking about retrofitting vehicles that don’t meet those requirements. Our best guess is that a HW3 upgrade is still years away.

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First Look at Tesla’s New 'Blind Spot While Parked' Feature [VIDEO]

Automobile Propre

Tesla software update 2024.44.3 has started rolling out to customers in larger waves recently and it brings several new features - including Actually Smart Summon to Europe and the Middle East, as well as improvements to Autopark. But that’s not all, it also adds a new Blind Spot Monitoring feature to the new Model 3, and potentially the Cybertruck, but that’s still to be determined.

We previously covered the Blind Spot Warning While Parked as part of our preview notes for update 2024.44, but now that it's going out to customers, it's time to see it in action.

New Anti-Door-Opening Feature!@TeslaNewswire @NotATeslaApp @Tesla #tesla #model3 pic.twitter.com/B4YkclRDx2

— Max Bracco (@max_bracco) November 21, 2024

Blind Spot Monitoring While Parked

If the vehicle’s door open button is pressed, and a vehicle or object is near or incoming, the vehicle’s Blind Spot Warning Light (2024 Model 3 and Cybertruck) will illuminate, an audible tone will ring and the door won’t open. A message will also be displayed on the center displaying, letting driver’s know why the door didn’t open.

Pressing the button a second time will allow you to override the warning and open the door normally, providing a way to get out in case you just parked close to a nearby vehicle or obstacle.

The object detection for this new feature includes cars, pedestrians, cyclists, and other objects - like things including traffic cones, bollards, strollers, and other large obstacles that FSD and vision-based Autopark detect during normal operation. Of note - this only works for the front two doors. Thanks to X user Max, who did some testing for us, It does not work for the rear passenger doors.

Optional Feature

The feature is optional - it’ll be enabled by default for safety, but if you need to enable or disable it, you can do so under Controls > Safety. For now, the feature is only available on the 2024 Model 3, but we expect it to roll out to the Cybertruck at least. However, there’s no reason why it can’t be added to other vehicles as well, minus the small red dot. We expect Tesla to eventually add this feature to all Tesla vehicles, but it’s currently not a part of update 2024.44.

Enhauto’s S3XY Buttons & Commander

If that’s not enough safety and vision for you, Enhauto, the makers of the popular S3XY Buttons and Commander recently put out a new software update for the 2024 Model 3, which makes some fantastic use of the ambient lighting.

With Enhauto’s solution, users are able to tie their ambient lights to Autopilot use, turn signals or even if a vehicle is their blind spot. Check out the video below for this awesome implementation, where the ambient lights turn red when another vehicle approaches.

Maybe Tesla will integrate something like this into a future update? We’ve been hoping for more customizability with their ambient lighting - it's an easy safety win and a demonstration of Tesla’s do-more-with-less attitude.

I look forward to @enhauto updates more than Tesla...

Ambient light effects....

I set default color to white.
Blinks green on turn signals
Turns blue on FSD activation
Yellow if someone in blind spot
Blinks red if turn signal on and blind spot activity detected.

All… pic.twitter.com/kFLh1slnEQ

— ProjectRCC (@Project_RCC) November 15, 2024

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Tesla Improves Trip Planner - Arrival State of Charge Coming

DBurkland/X

Tesla recently added the ability to report Supercharger issues - such as insufficient lighting, accessibility, cleanliness, and other things that can’t be automatically monitored. In response to the post on the official X Supercharger Community, Max de Zegher, Director of Charging, North America, confirmed that one of the most wish-listed features - Arrival State of Charge, is coming soon.

The feature is now possible thanks to what Wes Morrill, Cybertruck’s lead engineering, points out is a huge rewrite of Tesla’s Trip Planner, which not only makes it much more accurate but will now allow users to choose their arrival charge percentage.

More Accurate Trip Planner

When you navigate to a destination, your Tesla will automatically calculate when, where, and how much you need to charge. While the process seems straightforward, Tesla deserves a lot of credit for creating a simple user experience because a lot goes into accurately determining this information.

Tesla has to calculate many moving pieces in order to accurately predict when and where you should stop. First, it needs to consider your driving efficiency and wind direction, terrain elevation, traffic, vehicle speed, and ambient temperature. It also needs to predict the best Superchargers to stop at, taking into account congestion and charger speed.

This morning, in response to Dan Burkland, Wes shared that Tesla had significantly rewritten the backend portion of Trip Planner. These improvements, made by several engineers, were designed to improve Trip Planner’s accuracy and open the door to future features.

It sounds like these changes are mostly server-side, so thanks to their OTA connection, more accurate predictions should be available to all vehicles—no vehicle update is required.

Arrival State of Charge

Along with Tesla’s improvements to Trip Planner, Wes also stated that these improvements allow for a popular feature request — the ability to select your desired charge level at arrival.

Up until now, Tesla’s Trip Planner tried to get you to your destination as quickly as possible, which usually meant arriving with a low state of charge.

While this was fine if you have a charger at your destination, it’s not great if you don’t, or it could be even worse if there are no chargers nearby.

Max de Zegher said on X that he has heard the requests for a selectable arrival state of charge. Wes later clarified this by saying that these improvements to Tesla’s Trip Planner now allow for additional features to be added, such as “desired arrival charge.”

Actually trip planner got a huge rewrite on the back end. I had a great conversation with one of the engineers working on this over a morning run a few weeks back, it's pretty neat. The rewrite also unlocks additional features, like desired arrival charge.

— Wes (@wmorrill3) November 22, 2024

When Does it Arrive?

Given that Max de Zegher’s comments came last night and Wes Morrill commented this morning, this feature request likely won’t arrive with the upcoming Holiday Update. Tesla actually hinted at such a feature being added in their last app update, so it does seem like they’ve already planned for it.

Although ‘Arrival State of Charge’ was on our wishlist for the Holiday Update, it looks like it may arrive soon after the holidays.

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