An updated yoke is coming to the Model S and Model X, along with ambient lighting and more
Not a Tesla App
Tesla appears to be ready to unveil some changes to the Model S and Model X.
The Model S and Model X will gain updated "efficiency" packages in 2024. References to these hardware changes were spotted by Tesla enthusiast Greentheonly in the 2023.44.30.8 vehicle firmware. Green goes on to say that Tesla makes efficiency package changes when there are changes to the battery or drivetrain that affect the vehicle's range.
However, these changes don't necessarily mean the changes will improve efficiency or increase the vehicle's range.
Former Tesla service technician, Anthony Spina mentions that Tesla last changed an efficiency package in 2021 when they increased the battery pack for the Model 3 and Model Y from a 77 kWh battery to a 82 kWh battery. Tesla also added more efficient motors at the time.
Tesla recently updated their EPA mileage for new models in the U.S. and Canada due to government-required testing changes. Although vehicle hardware didn't change, the EPA estimates are now lower than before across most Tesla models, including other EVs.
This is because the EPA now requires vehicle manufacturers to account for all acceleration modes and averaging them when determining the vehicle's range.
To combat less efficient stopping modes, Tesla is removing roll and creep modes on new Model 3 and Model Ys in these countries.
Update: New Model Xs have now come off the assembly line with the new steering wheel we talk about in this article, although they do not include additional changes to the battery pack, drivetrain or the ambient lighting and front bumper camera changes. It appears that Green’s findings for the new efficiency package in the vehicle’s firmware may have been related to Tesla’s updated EPA range estimates and not related to changes to the battery pack or drivetrain themselves, as they have been in the past.
However, the new Model S and Model X are still expected to receive the ambient lighting treatment akin to the new Model 3 and the front bumper camera like the Cybertruck.
Center Horn
While looking through the firmware's code, Green also found a reference to a new yoke for the Model S and Model X. The new wheel will finally feature a mechanical horn in the center. Since the new Model S was revealed in 2021, it has used a small button on the steering wheel to activate the vehicle's horn.
We've heard that this center horn has been coming for a while now, but given that it's now showing up in Tesla's firmware, it looks like a release may finally be near.
Ambient Lighting and Bumper Camera Also Coming
The Model S is due for a new seat design. A few months ago, the parts catalog displayed a different seat design with a much higher and more narrow headrest. Directly below the headrest is a Plaid badge that looks like it could be swapped out for different designs. The seat design is similar to the RECARO or Sparco racing seats, two leaders in the performance automotive seat field.
The ambient lighting in the new Model 3, and Cybertruck has been a popular feature, adding an option to the vehicle's cabin that resonates with the high-tech feel of these vehicles. The ambient lighting addition is certainly coming to other models, and our source previously confirmed that it will include the Model S and Model X. Remember the Model Y refresh, code name Juniper is underway.
The front camera is also featured in the Cybertruck and will undoubtedly be added to the rest of the fleet. The camera removes the blind spot just in front of the car for those tight parking spaces and has been a welcome addition after removing other sensors. Our source also confirmed that the front bumper camera will also be arriving on the Model S and X.
However, all of these changes may not necessarily arrive at the same time. Tesla is all about efficiency and doesn’t roll out changes with model years, so they will typically only add new parts when they’ve used up their current supply. We could see the bumper camera arrive first and later followed by ambient lighting, although we wouldn’t expect these features to be very far apart.
It’s the start of a new year, but the same ol’Tesla, a company that continues to make changes, adapting to new testing and customer preferences.
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Tesla’s been on a roll with Supercharger improvements lately, from the 325kW charging update for the Cybertruck, to 500kW with V4 Superchargers coming next year. While those improvements have been limited to the Cybertruck, Tesla didn’t put all their focus on their new flagship vehicle, but looked at their more affordable vehicles as well.
LFP Battery Heating
Tesla’s Superchargers can now heat LFP Batteries - those that are in the Model 3 and Model Y Rear Wheel Drive variants. This applies to Long Range and Standard Range models, which saw a limited run. This is another update included as part of the 2024 Tesla Holiday Update - which really arrived with a lot of unannounced new features and capabilities.
The change is pretty interesting - Superchargers of the V3 and V4 variety can now pre-heat batteries for Model 3 and Model Y vehicles equipped with LFP battery packs. That means those vehicles are able to get back on the road faster when it's extremely cold. Of course, Tesla still advises you to precondition before you arrive, saving drivers time and money.
Max de Zegher, Tesla’s Director of Charging, also commented on the new feature. Essentially, Tesla is inducing an AC (alternating) ripple current through the battery to warm it up. Keep in mind that Superchargers are DC charging. That means it is possible to get a cold-soaked LFP vehicle on the road 4x faster than before, assuming that it didn’t precondition at all and that it is in the worst-case scenario (below 0ºF).
In essence, Tesla is using some engineering magic to turn the circuits inside the LFP battery into an electric heater - and powering that heater through the Supercharger. An AC ripple current is a small oscillation in the DC charging current that generates heat through electrical resistance, warming up the battery. Those ripples are a byproduct of converting AC to DC and back - so Tesla is using the onboard charger to induce those ripples to warm up the battery. Definitely an innovative technique that’s really only possible with the versatility of the NACS connector.
We’re hoping Tesla can implement this across their full lineup of vehicles, but we’ll have to wait and see how it is trialed across LFP vehicles first and if it is even possible on vehicles with 2170 or 4680 battery packs.
Tesla launched two FSD updates simultaneously on Saturday night, and what’s most interesting is that they arrived on the same software version. We’ll dig into that a little later, but for now, there’s good news for everyone. For Hardware 3 owners, FSD V12.6.1 is launching to all vehicles, including the Model 3 and Model Y. For AI4 owners, FSD V13.2.4 is launching, starting with the Cybertruck.
FSD V13.2.4
A new V13 build is now rolling out to the Cybertruck and is expected to arrive for the rest of the AI4 fleet soon. However, this build seems to be focused on bug fixes. There are no changes to the release notes for the Cybertruck with this release, and it’s unlikely to feature any changes when it arrives on other vehicles.
FSD V12.6.1 builds upon V12.6, which is the latest FSD version for HW3 vehicles. While FSD V12.6 was only released for the redesigned Model S and Model X with HW3, FSD V12.6.1 is adding support for the Model 3 and Model Y.
While this is only a bug-fix release for users coming from FSD V12.6, it includes massive improvements for anyone coming from an older FSD version. Two of the biggest changes are the new end-to-end highway stack that now utilizes FSD V12 for highway driving and a redesigned controller that allows FSD to drive “V13” smooth.
It also adds speed profiles, earlier lane changes, and more. You can read our in-depth look at all the changes in FSD V12.6.
Same Update, Multiple FSD Builds
What’s interesting about this software version is that it “includes" two FSD updates, V12.6.1 for HW3 and V13.2.4 for HW4 vehicles. While this is interesting, it’s less special when you understand what’s happening under the hood.
The vehicle’s firmware and Autopilot firmware are actually completely separate. While a vehicle downloading a firmware update may look like a singular process, it’s actually performing several functions during this period. First, it downloads the vehicle’s firmware. Upon unpacking the update, it’s instructed which Autopilot/FSD firmware should be downloaded.
While the FSD firmware is separate, the vehicle can’t download any FSD update. The FSD version is hard-coded in the vehicle’s firmware that was just downloaded. This helps Tesla keep the infotainment and Autopilot firmware tightly coupled, leading to fewer issues.
What we’re seeing here is that HW3 vehicles are being told to download one FSD version, while HW4 vehicles are being told to download a different version.
While this is the first time Tesla has had two FSD versions tied to the same vehicle software version, the process hasn’t actually changed, and what we’re seeing won’t lead to faster FSD updates or the ability to download FSD separately. What we’re seeing is the direct result of the divergence of HW3 and HW4.
While HW3/4 remained basically on the same FSD version until recently, it is now necessary to deploy different versions for the two platforms. We expect this to be the norm going forward, where HW3 will be on a much different version of FSD than HW4. While each update may not include two different FSD versions going forward, we may see it occasionally, depending on which features Autopilot is dependent on.
Thanks to Greentheonly for helping us understand what happened with this release and for the insight into Tesla’s processes.
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