Why You May Still be on Tesla Update 2024.8.9 or 2024.3.25 and What to Expect

Not a Tesla App

Tesla’s latest set of updates has been fast-moving, with lots of bug fixes, and this fits with Musk’s philosophy of moving fast and breaking things. Some people are still on 2024.8.9, some are still on 2024.3.25, and some people are already on the 2024.14.8 Spring Update, and there’s also the brand-new 2024.20 update that just went out to employees for testing.

Let’s take a look at how Tesla’s software distribution system works, and why you are where you are.

Statistics

Before diving deep into how it all works, let’s get some statistics out of the way. We’ll be using the statistics we use here on the site, which are powered by TeslaFi.

The vehicles on each update

Not a Tesla App

As we can see, the tracked fleet is about 30% 2024.14 – the spring update; 2024.8 – Tesla’s previous major update, which contains FSD V11; and 2024.3 – the FSD V12.3 update. The remaining fleet on 2023.44 or other updates is fairly negligible, at around 10%.

So, about 65% of the tracked fleet has access to FSD V12, depending on their country of origin. The remaining 25% of the fleet only has access to FSD V11 if they’re in an eligible region.

FSD Update Track

When someone subscribes or purchases FSD in the U.S. or Canada, Tesla enables the FSD feature on that vehicle’s firmware, which currently could be either FSD v11 or FSD v12.

Once you’ve subscribed to FSD, you’re generally put on the ‘FSD Track,’ which means you’ll start receiving the latest FSD updates, like FSD v12.4. These updates are usually exclusive to FSD subscribers as they serve as a testing ground for the latest FSD revision. They’ve been update versions such as 2024.9.5, 2024.3.25, 2023.27.5 and so on. In the past year or so, they’ve all been odd week numbers, but that hasn’t always been the case.

However, the downside is that Tesla develops FSD at a different pace, and while you’re one of the earlier individuals to test out the latest FSD version, these updates are usually several major updates behind Tesla’s latest, meaning you don’t always have access to Tesla’s latest features. Currently, these are owners on update 2024.3.25 who are waiting on FSD v12.4, but still don’t have the Tesla features in update 2024.8 or 2024.14.

Vehicle Eligibility

Not all vehicles are eligible for all updates, and this is a twofold reason. First, if you’re on an update that is on a newer branch, say 2024.8.9, you cannot go down to 2024.3.5. The version number is broken down to year, week number and revision. So update 2024.8.9 is the 9th revision of the update that was created on the 8th week of 2024.

In general, Tesla does not roll back versions, so if someone is already on update 2024.14, then their vehicle wouldn’t be eligible for FSD 12.4, which is update 2024.9.5. This is mainly due to potential issues since Tesla doesn’t thoroughly test rolling back software.

Your vehicle will always be eligible for updates on a later branch, even if you won’t necessarily receive that update – like the many owners on update 2024.8 or 2024.3 who haven’t received update 2024.14 yet.

The second factor is hardware. Vehicles on older hardware variants, or vehicles that are considered to be legacy, are just not eligible for some updates. This is something that Tesla decides as newer hardware is needed for newer features and support for legacy hardware may not be included in all updates.

If you’ve subscribed to FSD and you’re on update 2024.8.9 and wondering why you’re not receiving update 2024.14, that’s why. Tesla wants your vehicle to be eligible for the next FSD v12.4 update, which will be update 2024.9.5.

Vehicle Variants

Sometimes, updates are not sent out widely for the simple reason of hardware variants. Tesla’s fleet has become widely fractured over the years, with many different variants of vehicles on the road today. Some 2022 Model Y’s may have Matrix headlights, while some may not, and some may have USS, while others don’t. Most have HW3, but a few have HW4!

That’s 6 possible branching variants in one year – a total of 24 possible variants for just the 2022 Model Y, not including the Performance, Long-Range, Rear-Wheel Drive, 4680-cell Rear-Wheel Drive, and the odd 2022 Standard-Range Dual-Motor variants that are also all different! If you did the math, there are 362 thousand possible variants, but not likely more than ~40 or so actual builds that Tesla differentiates between for software for all vehicles.

Of course, Tesla has managed to pare down these variants through the 2023 and 2024 model years, with greatly simplified production chains, with the removal of USS in favor of Tesla Vision, the full move to Hardware 4 across all factories, and Matrix headlights becoming standard globally. But all those existing vehicles are not legacy, and still need updates.

That means a complex and well-thought-out update process has to be built in order to deploy a functional update to all these vehicle variants.

Bug Fixing

Besides the complexity of vehicle variants, Tesla also has to catch and fix bugs. No matter how good one is at software development, sometimes bugs just escape into the wild. And fixing those bugs is essential since they could leave a vehicle undriveable. Although a major issue is rare, Tesla has had some issues in the past, such as Automatic Emergency Braking being disabled due to a software issue. This is why Tesla rolls out updates gradually.

We’ve seen this play out with update 2024.14, which has received numerous bug-fix releases. Tesla will release an update to a set of cars, discover an issue, and stop the rollout. A few days later, another update is out with additional fixes, and so on.

Conclusion

So, if you’re stuck on update 2024.8.9 or 2024.3.25, and are wondering when you’ll get FSD V12 or the Spring Update, you’ll have to hang on – the author is also on 2024.8.9 with V11!

Elon Musk mentioned on X that FSD V12.4 should be the update the reduces FSD branching and will bring everyone to FSD V12 in general. 2024.9.5 is the FSD V12.4 update, and it looks like vehicles that are below that branch number should be collectively receiving the reduced-nag V12.4 update.

When we finally receive FSD V12.4, we’ll likely need to hang on for a little longer until FSD V12.4.1 or FSD V12.5 rolls along to have the Spring Update.

Follow

Follow

Follow

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

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.

Follow

Follow

Follow

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

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.

Follow

Follow

Follow