Tesla Releases the 2021 Holiday Update with update 2021.44.25

By Nuno Cristovao

This year's Holiday Update was building up to be an exciting one. After last year's disappointment, Tesla was certainly not planning to repeat it again this year.

The Holiday Update was expected to be released to the first individuals on Tuesday, and just a few hours before, we're now seeing many of the new features in this year's Holiday Update.

Let's just say it's a good one. If you're the kind of person that prefers to be surprised, you may not want to scroll any further.

The Holiday Update comes in as version 2021.44.25.

Light Show

Tesla Light Show
Tesla Light Show
Emulsifide/Reddit

Just as the rumor showed yesterday, the former Model X exclusive Light Show easter egg will now be available on all Teslas.

This easter egg will have your car use its headlights, fog lights, turn signals, mirrors, and speakers to perform a coordinated light show.

The Model X's version of the easter egg plays the Trans-Siberian Orchestra. It's not clear whether this easter egg will play the same song or offer a variety of songs to pick from.

Customizable App Launcher

Customize your app launcher
Customize your app launcher
Emulsifide/Reddit

This one is huge. Tesla is bringing some of the "v11" software features to the Model 3 and Model Y. Technically, the new Model S is not on v11, but its new interface is often referred to as v11 or the new UI.

It's not the entire Model S UI that is being brought over to the Model 3 and Model Y, but instead some of its most functional features.

Some features such as window docking, Auto Shift, the music mini-player, and other features will remain only on the new Model S, at least for now.

This feature brings over one of the most useful features of the new UI, a customizable app launcher.

The car's bottom navigation will now feature three areas. A fixed area of icons that you can't change, a customizable area where you can put your favorite Tesla apps such as the web browser, energy graph, or Spotify, and a Recents section that will show any recent apps you've used.

For better or worse, the app icons are now also the same ones from the Model S, featuring more detailed, colorful icons.

Simplified Controls

Simplified Controls
Simplified Controls
Emulsifide/Reddit

The Model 3 and Model Y feature swipeable cards underneath the car's visualization that shows important information such as the odometer, tire pressure readings, active call information, wiper settings, and more.

The idea of the cards is good, but some crucial information was only available in these cards, which wasn't intuitive. Tesla is fixing that in this update.

Tesla is keeping some of the cards such as wiper controls, but moving most of the other information into the car's main Controls menu.

For example, to access the odometer, you will now go to Controls > Trips, much like the Model S.

For tire pressure, you can go to Controls then choose Service.

Blind Spot Camera

Blind Spot Camera
Blind Spot Camera
Emulsifide/Reddit

You can now choose to have your car's fender camera feed displayed directly on the screen when you activate your turn signal.

This is the same camera view that can be displayed when you put your car into reverse.

It will be an option for those that prefer not to use it.

Edit Waypoints

Edit Waypoints
Edit Waypoints
Emulsifide/Reddit

Tesla introduced Waypoints just a few weeks ago. So many owners were excited to receive the update, but now, even before many owners have received waypoints, Tesla has a major update to it.

When waypoints was introduced, you needed to add destinations starting with your final destination first, as there was no way to reorder the destinations.

With this update Tesla is making waypoints more flexible, you will now be able to add, remove or reorder waypoints.

TikTok

TikTok
TikTok
Emulsifide/Reddit

TikTok will now be the latest video service added to your Tesla. It will require Tesla's Premium Connectivity plan unless you're on WiFi and it will be available alongside other streaming services in Tesla Theater.

Sonic the Hedgehog

Sonic the Hedgehog
Sonic the Hedgehog
Emulsifide/Reddit

This was another suspected feature in this year's holiday update. Elon and Sega both confirmed that the original Sonic game will be playable inside of Teslas in the near future.

Like many of Tesla's other games, this one will also support a controller. Check our list of all controllers compatible with your Tesla, as you may already have one that works.

The Battle of Polytopia - Multiplayer Support

Multiplayer Support
Multiplayer Support
Emulsifide/Reddit

Tesla added The Battle of Polytopia, a civilization-type game late last year. Tesla has now expanded the game to include multiplayer support.

Sudoku

Sudoku game
Sudoku game
Emulsifide/Reddit

Late last year Elon was asked on Twitter whether the game Sudoku could be added to Teslas. Elon responded with one of his typical, "sure" replies.

And a year later, we have Sudoku.

It looks like the game will have various difficulty levels and hints. Like most Tesla games, it should also save your progress so that you can continue your puzzle next time.

Cold Weather Improvements

Cold Weather Improvements
Cold Weather Improvements
Emulsifide/Reddit

Honestly, I'm not sure why Tesla is still using this term. I feel like we're all tired of seeing it and it causes an unintentional eye roll for many.

However, it looks like there is something worth mentioning here. You will now be able to precondition your car even if you have a low battery.

Previously if your battery had less than a 20% charge, you would not be able to precondition the car. It looks like Tesla will now let you precondition your car unless your car's battery is very low.

Automatic Seat Heaters

Automated seat heaters
Automated seat heaters
Emulsifide/Reddit

This was another feature that Elon said was coming soon earlier this year.

Tesla is simplifying the seat heater controls by turning the seat heater button into a single on/off button, instead of having four different settings (off, level 1, 2, and 3).

The temperature of your seat will instead vary based on the temperature of the cabin and what the climate system is set to.

You will continue to be able to set your seat heater manually if you don't have your HVAC system set to auto.

Manage Dashcam Clips

Delete all events
Delete all events
Emulsifide/Reddit

Tesla's dashcam is a fantastic feature, but it's easy to accrue a bunch of clips that later need to be deleted one by one.

With this update, Tesla will now let you delete all dashcam clips with a single tap in the main Controls menu.

Many users would have preferred to be able to manually select multiple Dashcam or Sentry Mode clips directly from the Dashcam Viewer and delete them that way, but this is a nice feature to have nonetheless.

Dark Mode

Dark Mode
Dark Mode
Emulsifide/Reddit

Tesla already supported light and night modes that would automatically switch based on the time of day.

However, Tesla is now introducing a new Dark Mode that will presumably be more usable during the day.

Tesla's previous night display was often difficult to see in bright situations. This mode is expected to use darker colors and increased contrast instead of the grays used in night mode.

Hide Map Details

Hide pins
Hide pins
Emulsifide/Reddit

Continuing with Tesla's theme of simplifying the display and controls, Tesla will now let you hide unneeded map information.

This new feature allows you to hide nearby locations that normally appear as a pin on the map.

It looks like these are the majority of the features in this year's holiday update.

These features are based on what an owner has received in their Model 3. There may be some additional features for other Model 3 configurations or features that may be exclusive to the Model S or Model X.

You can also view the release notes for Tesla's Holiday Update (2021.44.25).

Update: Tesla released many new features in the 2021 Holiday Update. The holiday update was released with version 2021.44.25.

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Tesla LFP Batteries Can Now Be Warmed up While Supercharging Using Innovative Feature

By Karan Singh
Not a Tesla App

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 Included FSD V12.6.1 and V13.2.4 in the Same Update: What Caused This and What It Means

By Karan Singh
Not a Tesla App

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.

While this update focuses on bug fixes, Tesla’s already working on bigger features for FSD V13.3, which we have already confirmed to include improvements to highway following and speed control.

FSD V12.6.1

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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