Firmware
Expect to see more Tesla ‘unlockable’ features bundled into its cars
When Tesla revealed that Model S 70 owners with the 70 kWh battery could in fact unlock an extra 5 kWh for a fee bringing it to a total of 75 kWh, it sent the rest of the auto industry a loud and clear message that the company can and will continue to streamline ways to continuously improve upon its vehicles via over the air updates. It wasn’t the first time Tesla has done this and it certainly won’t be the last. Let’s look at what some of these ‘unlockable’ features are.
Upgrading a 70 kWh battery to 75 kWh
There have been some debates online about whether or not it makes sense to do the upgrade.
Some argue that they can “use” the bigger battery to offset long term battery degradation and enjoy the benefit at no extra cost. While it’s probably true that the larger battery will degrade even less, Tesla’s battery degradation over time is very slight. At over 60,000 miles I’ve only lost 5% of battery range which is roughly 13 miles of rated range – a negligible amount for me. Sure it would be nice to 5 kWh of extra battery, but at the end of the day the increase in range from the upgrade is relatively immaterial.
Tesla has priced this upgrade after delivery at $3,250 US, and $3,000 if you select the larger battery at the time of ordering the car. This means the battery upgrade is being priced at $650/kWh.
The base Model 70D has a range of 240 miles. The Model 75D has a range of 259 miles, 19 miles or 8% extra range from the upgrade. Another way of looking at the price is that it costs $171/mile of range. Here again I’d make the argument that most people will find an extra 19 miles pretty insignificant. There of course will be a few owners that absolutely must have the extra 19 miles, but for most the upgrade won’t make sense. Note that the 70D and 75D both Supercharge slower than the 85D and 90D cars — if you also got a boost in charging speed from the upgrade perhaps it would be more valuable.
So, why am I a fan of Tesla offering unlockable software features like this? The reason is that it allows Tesla to simplify their manufacturing and production process by creating a single version of the vehicle, while allowing the company to also roll out better functionality over time through over-the-air updates initiated by in-car purchases. Tesla is essentially creating micro-transactions with each of its upgradeable features.
I feel that the transition from 70D to 75D was was nicely executed, and it’s evident that Tesla continues to lay the foundation for a future where new hardware and new features can be gracefully introduced, while keeping recent buyers happy that they didn’t “miss out” on the latest and greatest.
Autopilot
Even before the 75D battery upgrade was introduced, Tesla had already begun including Autopilot hardware on all Model S even before the Autopilot suite of functionality was even available.
Today you can buy a Tesla with or without autopilot functionality (the feature is $2,500 when you buy the car, but $3,000 as a retrofit after delivery), however all cars from September 2014 and onwards have the hardware for Autopilot.
Tesla recently offered a free 30 day trial of Autopilot to owners that opted out of purchasing the optional feature as a way to encourage them to experience the new technology. But ultimately it hopes that these owners will pay to upgrade. Here again Tesla is fronting the costs of Autopilot hardware and making the bet that most owners will purchase the feature once they had a chance to experience it.
One such Model S owner describes his first experience with Autopilot through the trial offer.
Looking Back
Back in the early days when the Model S was first introduced, Supercharging wasn’t enabled on all vehicles. Owners had to pay extra to receive Supercharging hardware either at the time of ordering their car or as a retrofit later on. Even to this day older Tesla Model S 60 models can enable Supercharging through the company’s online store.
Tesla also offered a 40kWh battery version of the Model S to help Tesla make good on a promise that the base price would start at $50,000. With “only” 160 miles of rated range, the 40kWh version wasn’t very popular. To improve production efficiencies, Tesla in reality built 60 kWh versions of the car and software limited it to 40kWh. The price to upgrade from 40 kWh to a 60 kWh back then was a whopping $11,000 upgrade. But even at that price the cost per kWh was $550/kWh making it $100 lower per kWh than what they’re currently on the 70D to 75D upgrade.
Summary
I fully support Tesla’s strategy of reducing the number of permutations its manufacturing line has to deal with. I also like the idea of encouraging secondary transactions and allowing people to upgrade their cars after they take delivery. Their whole approach gives Tesla a lot of flexibility with improving the vehicle over time, and allows buyers – whether money constrained, or they just don’t need an option – to delay the purchase of features until a later time when it suits their needs.
I wonder why some features like Premium Sound and XM radio haven’t gone the same route as I have to imagine the incremental costs of the hardware for those options are a lot smaller than those for autopilot or Supercharging.
I do believe, however, that the after-delivery pricing of some of these options may come down over time. Tesla has sunk costs in the hardware. If the owners don’t upgrade in year 1, why shouldn’t Tesla lower the price in year 2? Tesla stands to make no money back on their investment in the individual cars if they can’t get people to upgrade, so why not lower prices over time? While it may seem like they’re devaluing the feature, there is a strong motivation for the owner to pay sooner rather than later in order to get more years of enjoyment and use of the feature. Just as the car’s value declines over time, so should that of the features.
Tesla announced its Spring 2026 software update, and it’s the most feature-dense seasonal release the company has put out. The update covers twelve named changes spanning FSD, voice AI, safety lighting, dashcam storage, and pet display customization, among other things.
The centerpiece for owners with AI4 hardware is a redesigned Self-Driving app. The new interface lets owners subscribe to Full Self-Driving with a single tap and view ongoing FSD usage stats directly in the vehicle.
Grok gets its biggest in-car upgrade yet. The update adds a “Hey Grok” hands-free wake word along with location-based reminders, so a driver can now say “remind me to pick up groceries when I get home” without touching the screen. Grok first arrived in vehicles in July 2025, but each update has pushed it closer to genuine daily utility. Musk framed the broader vision clearly at Davos in January, saying Tesla is “really moving into a future that is based on autonomy.”
On safety, the update introduces enhanced blind spot warning lights that integrate directly with the cabin’s ambient lighting, building on the blind spot door warning that arrived in update 2026.8.
Dog Mode has been renamed Pet Mode and now lets owners choose a dog, cat, or hedgehog icon and add their pet’s name to the display.
Dashcam retention now extends up to 24 hours, up from the previous one-hour rolling loop, with a permanent save option for any clip. Weather maps now show rain and snow with better color differentiation and include the past hour of precipitation data along the route.
Tesla has now established a clear rhythm of two major OTA pushes per year. As with last year’s Spring update, that cycle started taking shape in 2025 with adaptive headlights and trunk customization. The 2025 Holiday Update then added Grok to the vehicle for the first time. This Spring follows that structure: the Holiday update introduces new architecture, and the Spring update broadens it across the fleet.
Two notable features still did not make it. IFTTT automations, which launched in China earlier this year, were held back from this North American release for unknown reasons, and Apple CarPlay remains absent, reportedly still delayed by iOS 26 and Apple Maps compatibility issues.
Below is the full list of feature updates released by Tesla.
— Tesla (@Tesla) April 13, 2026
It appears that Tesla may be preparing to roll out some subscription-based services soon. Based on the observations of a Wales-based Model 3 owner who performed some reverse-engineering on the Tesla mobile app, it seems that the electric car maker has added a new “Subscribe” option beside the “Buy” option within the “Upgrades” tab, at least behind the scenes.
A screenshot of the new option was posted in the r/TeslaMotors subreddit, and while the Tesla owner in question, u/Callump01, admitted that the screenshot looks like something that could be easily fabricated, he did submit proof of his reverse-engineering to the community’s moderators. The moderators of the r/TeslaMotors subreddit confirmed the legitimacy of the Model 3 owner’s work, further suggesting that subscription options may indeed be coming to Tesla owners soon.
Did some reverse engineering on the app and Tesla looks to be preparing for subscriptions? from r/teslamotors
Tesla’s Full Self-Driving suite has been heavily speculated to be offered as a subscription option, similar to the company’s Premium Connectivity feature. And back in April, noted Tesla hacker @greentheonly stated that the company’s vehicles already had the source codes for a pay-as-you-go subscription model. The Tesla hacker suggested then that Tesla would likely release such a feature by the end of the year — something that Elon Musk also suggested in the first-quarter earnings call. “I think we will offer Full Self-Driving as a subscription service, but it will be probably towards the end of this year,” Musk stated.
While the signs for an upcoming FSD subscription option seem to be getting more and more prominent as the year approaches its final quarter, the details for such a feature are still quite slim. Pricing for FSD subscriptions, for example, have not been teased by Elon Musk yet, though he has stated on Twitter that purchasing the suite upfront would be more worth it in the long term. References to the feature in the vehicles’ source code, and now in the Tesla mobile app, also listed no references to pricing.
The idea of FSD subscriptions could prove quite popular among electric car owners, especially since it would allow budget-conscious customers to make the most out of the company’s driver-assist and self-driving systems without committing to the features’ full price. The current price of the Full Self-Driving suite is no joke, after all, being listed at $8,000 on top of a vehicle’s cost. By offering subscriptions to features like Navigate on Autopilot with automatic lane changes, owners could gain access to advanced functions only as they are needed.
Elon Musk, for his part, has explained that ultimately, he still believes that purchasing the Full Self-Driving suite outright provides the most value to customers, as it is an investment that would pay off in the future. “I should say, it will still make sense to buy FSD as an option as in our view, buying FSD is an investment in the future. And we are confident that it is an investment that will pay off to the consumer – to the benefit of the consumer.” Musk said.
Tesla has started rolling out update 2020.36 this weekend, introducing a couple of notable new features for its vehicles. While there are only a few handful of vehicles that have reportedly received the update so far, 2020.36 makes it evident that the electric car maker has made some strides in its efforts to refine its driver-assist systems for inner-city driving.
Tesla is currently hard at work developing key features for its Full Self-Driving suite, which should allow vehicles to navigate through inner-city streets without driver input. Tesla’s FSD suite is still a work in progress, though the company has released the initial iterations of key features such Traffic Light and Stop Sign Control, which was introduced last April. Similar to the first release of Navigate on Autopilot, however, the capabilities of Traffic Light and Stop Sign Control were pretty basic during their initial rollout.
2020.36 Showing Speed Limit Signs in Visualization from r/teslamotors
With the release of update 2020.36, Tesla has rolled out some improvements that should allow its vehicles to handle traffic lights better. What’s more, the update also includes a particularly useful feature that enables better recognition of speed limit signs, which should make Autopilot’s speed adjustments better during use. Following are the Release Notes for these two new features.
Green Traffic Light Chime
“A chime will play when the traffic light you are waiting for turns green. If you are waiting behind another car, the chime will play once the car advances unless Traffic-Aware Cruise Control or Autosteer is active. When Traffic Light and Stop Sign Control is activated, a chime will play when you can confirm to proceed through a green traffic light. To enable, tap Controls > Autopilot > Green Traffic Light Chime.
“Note: This chime is only designed as a notification. It is the driver’s responsibility to observe their environment and make decisions accordingly.”
Speed Assist Improvements
“Speed Assist now leverages your car’s cameras to detect speed limit signs to improve the accuracy of speed limit data on local roads. Detected speed limit signs will be displayed in the driving visualization and used to set the associated Speed Limit Warning.
“As usual, to adjust Speed Assist settings, tap Controls > Autopilot > Speed Limit.”
Footage of the new green light chime in action via @NASA8500 on Twitter ✈️ from r/teslamotors
Amidst the rollout of 2020.36’s new features, speculations were abounding among Tesla community members that this update may include the first pieces of the company’s highly-anticipated Autopilot rewrite. Inasmuch as the idea is exciting, however, Tesla CEO Elon Musk has stated that this was not the case. While responding to a Tesla owner who asked if the Autopilot rewrite is in “shadow mode” in 2020.36, Musk responded “Not yet.”
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