Tesla's Model S and Model X vehicles offer SiriusXM radio through dedicated hardware that includes an antenna to receive the satellite-based signals. This is a premium feature that Tesla only offers in their Model S and X line. The Model 3 and Model Y, unfortunately, lack the SiriusXM hardware and are not capable of streaming the service.
Many fans of the satellite-based network are forced to either buy a car unit and hook it up via the auxiliary jack or stream audio from their phones to the car via Bluetooth. Although, neither situation is ideal.
Cost Cutting
Over the past few years we have seen Tesla take several cost-cutting measures on the Model 3 and Model Y to help keep the cars more affordable. Some design choices have always been there for cost reasons, while others were changed due to efficiencies or to streamline manufacturing. Tesla is extremely agile and always looking for benefits that pay off in the long term. While some of their choices have paid off, some have not.
For example, Tesla chose not to include a dedicated rain sensor in their vehicles and instead relies on cameras and AI to detect rain. Unfortunately, this is one area where Tesla's solution has fallen short. While the vehicle's automated wipers have improved in the last couple of years, they're still not as reliable as a dedicated rain sensor.
It’s a similar case with Tesla’s automatic high beams, where the vehicle turns on and off its high beams automatically based on how dark it is and whether there are any oncoming vehicles. This feature performed rather poorly for several years and only recently has Tesla's auto high beams become more accurate and reliable.
Tesla has always had a long-term vision for their vehicles and has bet heavily on software to be able to make up for missing hardware in the future. With the automatic wipers, Tesla chose to skip a $4 sensor because they felt they could save money and do the same or better job with a software-based solution.
And how does this relate to SiriusXM? When Tesla designed the Model 3, they needed to make a lot of cost-based decisions. The Model S and Model X included SiriusXM hardware, but they chose to exclude it in the Model 3 and Model Y. It’s clear that the hardware was not being provided by SiriusXM for free. There’s no doubt they needed to cut costs to offer the Model 3 at $35,000, but did they remove SiriusXM hardware because Tesla thought they could provide a software-based solution? Maybe. After all, they did it for their automated windshield wipers, high beams and garage door opener support. Why not SiriusXM?
So the question is, why would Tesla leave out the SiriusXM streaming service when it could save them millions of dollars per year by not including the SiriusXM hardware in their more expensive vehicles? Although SiriusXM hardware provides some advantages, such as not requiring an internet connection, it could also fail in certain situations such as when traveling through tunnels. We think we’ll see Tesla add support for SiriusXM's streaming service to all vehicles in a future update.
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.
![Video Reveals the Cybertruck's Unique User Interface [Video]](https://www.notateslaapp.com/images/news/2023/cybertruck-ui-1_300w.jpg)
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