Tesla Model 3 and Model Y to have faster processors, 12v li-ion battery and more

New Tesla Model Y Performance models coming out of China this month have the biggest changes we've seen to the car so far. The cars have several major hardware changes that improve the infotainment system, noise isolated and more.

Tesla starts using 12v lithium-ion batteries

JayinShanghai/Twitter

Infotainment Processor

The first major upgrade is the processor that powers the car's infotainment display. It has been upgraded from the Intel Atom processor to a much faster AMD Ryzen chip. It's the same chip that's used in the redesigned Model S and X, although the Model S and X feature 16GB of ram while these new Model Ys appear to have only 8GB.

This processor is much faster than the Atom processors that are currently in Model 3s and Model Ys.

Graphics Processor

The new Model S and X feature a dedicated GPU that is capable of PS5-like graphics. The system is able to play one of the most intensive video games, Cyberpunk 2077.

We thought that this chip would be exclusive to Tesla's higher-priced vehicles, but surprisingly, the new Model Ys feature the same graphics processor in the new Model S and X.

.@xiaoteshushu GigaWorkshop Tear-down of Tesla MIC Model Y Performance.

First look inside the new MCU component, GPU (AMD Ryzen) is the same as Model S Plaid.#Tesla #TeslaChina #ModelYPerformance $TSLA @teslacn @elonmusk @AMDRyzen pic.twitter.com/boiDbIiuw0

— Jay in Shanghai ?? (@JayinShanghai) November 28, 2021

It appears that Tesla plans to keep the infotainment and graphic processors the same across their entire lineup of cars. Having such an advanced processor will surely open up the possibilities to new games and enhanced capabilities in the car.

MCU 3

When the Model S was unveiled, it contained this new processor and high-end gaming capabilities. At the time, no one was sure whether this hardware would be exclusive to the Model S or whether it would trickle down to other vehicles.

Tesla MIC Model Y Performance First Look！

Does AMD Ryzen seem to make the new MIC Model Y Performance look smoother than ever?

What do you think?

AMD YES？

(Video shared by users in our community group) $TSLA @elonmusk pic.twitter.com/0kfLm2G6vo

— 42HOW (@42how_) November 26, 2021

However, at this point it's fairly certain that the AMD Ryzen chip and graphics processor Tesla is using will be a part of Tesla's MCU 3 and will be used across their entire fleet.

Software

Although the new Model Ys coming out of China contain the same CPU and GPU processors as the new Model S, they still feature the same 15" screen as other Model Ys. They also still use the same user-interface as all current Model Ys, although they're certainly capable of running the same Tesla interface in the new Model S.

It's not clear whether the new interface is still being adapted for slightly smaller screens, but we expect that these new Model Ys with MCU 3 will be running the updated Tesla interface in the future.

We don't know if vehicles with MCU 2 will be able to run the updated interface at some point. Tesla employees have previously said off the record that MCU 2 isn't capable of running the new interface found on the new Model S, but it's possible that Tesla figured out a way to run the new interface on MCU 2 vehicles. If the new interface comes to MCU 2 cars, it'll likely need to be adapted to be able to run on slower hardware or limit some of its features, such as dragging and docking windows.

12v Battery

All Teslas up until the release of the redesigned Model S and Model X used 12v lead-acid batteries. This lower voltage battery is used to power door locks, electronics and other smaller items in the car that can't be run off of the high voltage battery.

The 12v lead-acid batteries in Model 3 and Model Ys are the same kind found in just about every other car. The battery is recharged off of the car's main battery. These lead-acid batteries last about four to five years, but we've seen them last only a couple years as well.

With the new Model S, Tesla switched to a lithium-ion based battery that is much lighter and lasts much longer than lead-acid batteries.

These new Model Ys coming out of GIGA Shanghai are coming with the same lithium-ion battery that is found in new Model S and X vehicles.

The battery is estimated to last the life of the vehicle and never needs replacing. This is a nice improvement and it's a great way for Tesla to reduce Tesla service visits.

It also helps increase customer satisfaction and lower the maintenance required for Teslas even further.

Although replacing a lead-acid battery in a vehicle isn't an expensive procedure, having a lithium-ion battery that doesn't need to be replaced is a nice improvement for all future Tesla owners.

It'll be interesting to see whether Tesla will be able to upgrade lead-acid batteries to their lithium-ion models in future service calls for any customers that need one replaced.

Other Changes

Another change that has been noticed in these new models is that the rear passengers windows now have double laminated glass similar to the front windows, to help further isolate road noise.

It's possible that there are other smaller changes in these new models as well, but these have been the major changes observed so far.

These hardware changes are currently exclusive to new Model Y Performance models coming out of China. Tesla slowly makes changes to its lineup throughout the year when possible, but the changes we're seeing here are major improvements to the vehicle.

You can be sure that all Tesla factories will adopt the same hardware changes we're seeing in China across all models in the coming weeks or months.

There has now been a video posted that compares how much faster MCU 3 is compared to MCU 2 when loading various apps.

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Tesla to Replace Battery Seals on Select Model S and Model X Vehicles

Not a Tesla App

Tesla has begun reaching out to customers to replace the high-voltage battery pack seals in Model S and Model X vehicles manufactured between 2021 and 2022. In particular, this impacts vehicles between January 2021 and September 22, 2022. 

Tesla is notifying impacted owners through a notification and message in the Tesla app.

Plunger Replacement

The high-voltage battery port plungers intended for internal water leak egress (also known as flood ports) are being replaced with improved parts. The new parts are designed to be more robust against external water ingress due to submersion during flooding or other high-severity water impacts.

Tesla specifically notes that no action is needed from owners at this time - once the parts are available, owners will be notified with a notification from the app to encourage them to schedule a service appointment.

This voluntary recall is likely related to the incident where the fully submerged Model X caught on fire underwater, requiring first responders to wait for the battery to burn out before recovering the vehicle. That incident occurred back in October 2023. 

While Submarine Mode is a fun Easter Egg, it doesn’t actually improve your vehicle’s water rating.

Service Details

Taking a look at the Service Bulletin (SB-25-16-002), Tesla will be replacing all five flood ports and, if necessary, the breather plugs and flood port doors. Tesla will require you to take your vehicle in for this appointment, which should take approximately 90 minutes for the Model S, and approximately 60 minutes for the Model X. Tesla’s Mobile Rangers won’t be able to complete this activity in your driveway.

The part being replaced is the plug.

Not a Tesla App

Because this is a voluntary recall, Tesla will be offering this as a goodwill service for any owners who have exceeded their Model S or Model X limited battery warranty - so don’t hesitate to take your vehicle in.

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Musk Teases Major Improvements to FSD — Is Version 14 on the Way?

Not a Tesla App

Following a period of radio silence from Tesla on FSD updates, Elon Musk has finally hinted that progress is continuing behind the scenes on FSD and that “Several major improvements are incoming.” We’re pretty excited - it has been over 100 days since the last FSD update, and we haven’t heard much since then.

And several major improvements are coming

— Elon Musk (@elonmusk) May 1, 2025

The latest versions of FSD were V13.2.8 for AI4 vehicles and V12.6.2 for HW3 vehicles, both of which were released in January of this year — almost four months ago. While development has been ongoing internally, many have been wondering what the next public release will be. Will it be FSD V13.3, or will we jump straight to FSD V14.

Decoupled Releases & Spring Update

Tesla has now begun pushing Early Access users the 2025 Spring Update without an FSD version change. This means that we can expect the next FSD update to likely be based on the 2025.14 branch.

It’s worth noting that Tesla can add improvements to FSD at any time - and sometimes they do make minor changes without incrementing release numbers - small flag changes in FSD’s software to address how it does a specific task, or what data is uploaded.

With all that said, we expect the Spring Update to begin going out to more of the fleet in the coming days. We’re currently seeing about 58% of the fleet on the Spring Update, and only 30% of the fleet on the older 2025.8 January Update.

Cybertruck FSD

Not A Tesla App received information that an upcoming update was set to bring features from other AI4 vehicles to the Cybertruck, including Start FSD from Park, Unpark, Actually Smart Summon, and more. This update was intended to bring it closer to feature parity with the rest of Tesla’s AI4 fleet, but for now, Cybertruck remains the redheaded stepchild of the fleet.

We’re still confident that Tesla is working on this, and the continued delays on the release of an FSD update could point to the Cybertruck and a lack of data continuing to be a pain point for Tesla’s AI team. Cybertruck owners, including the author, have noted that FSD-equipped Cybertrucks continue to upload several hundred gigabytes or more of data per month. This topped out at nearly 1.9 TB of data uploaded in April 2025 for the author.

That’s a massive amount of data - and other users on social media have mentioned much the same for their own Cybertrucks. Tesla needs as much data as possible to tune the FSD models, and given the small fleet size for the Cybertruck, it requires a vast amount of data per user.

“Major Improvements”

While Elon didn’t mention what constitutes these major improvements, we have a lot of expectations besides what we know about the Cybertruck. Learning from the recent and successful FSD launch in China, Tesla is now able to utilize a more generalized model without specific local training data. This could potentially translate into better performance in North America as well, as the 7.7 million miles globally driven on FSD every day are feeding back into Tesla’s data loop.

We’re hopeful that future improvements continue to focus on improving tracking and decision-making, as well as lane handling. FSD users on X continue to point out issues with lane selection and lane keeping in the latest versions of FSD. On the flipside, Tesla has greatly increased the comfort and smoothness of FSD - and V13 is a prime example of that.

While V13.2.8  is also capable of pulling into parking stalls both forwards and in reverse (thanks to one of those flag changes recently), it does an oddly poor job of parking. Tesla’s Vision Autopark, on the other hand, is exceptionally accurate, even with big vehicles like the Cybertruck. It feels like Tesla is working on the parking lot stack to prepare for the upcoming launch of Robotaxi in June.

What About FSD V14

Back in the Q4 2024 Earnings Call, we heard about FSD V14, and just learned a little bit of what will make it unique. In this case, it's auto-regressive transformers that will improve FSD’s already powerful perception system and help it to predict better how other vehicles and road users will behave around it.

That, alongside a larger model and increased context size, will help FSD manage edge cases and make better decisions. The larger model and context size increases are likely another challenge for Tesla, which is already pushing the hardware limits of AI4 with FSD V13.

We did a deep dive into what we know about V14, which you can read here.

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