A day after Tesla started sending FSD (Supervised) v14.3 Lite to legacy Model S and Model X cars with the Intel infotainment computer, the first hands-on reports are in, and they change what owners should expect. The build is a real step up from the v12 software these cars were stuck on. But it is not the same Lite package that HW3 Model 3 and Model Y owners have been using since earlier this month.

What's missing on Intel S and X

Not a Tesla App, working from an owner's installs on two Model X cars, one a 2017, running software 2026.38.5.1, reports that legacy S and X miss out on Arrival Options, starting FSD from Park and reversing on FSD. All three are available to HW3 Model 3 and Model Y cars on v14.3 Lite. Actually Smart Summon is not included either.

Software tracker Teslascope posted matching first impressions Wednesday afternoon: a "vast improvement over V12," better speed control and less steering-wheel nagging, but "no parking or arrival options," "no reversing (so far)" and no Actually Smart Summon.

Two things did make it. Not a Tesla App says the build includes Speed Profiles and the new FSD streak counter, which tracks how far you have driven without an intervention. The counter was not mentioned in the release notes.

A correction to early expectations

When the rollout began Tuesday night, some widely shared posts said Intel S and X would get parking, unparking, reversing, Arrival Options and Speed Profiles. That matched Tesla's published Lite notes for Model 3 and Y. Our own story on Tuesday told owners to expect roughly that list, while warning that Tesla had not published separate S/X notes. The installs now show the S/X build is narrower. Tesla has not explained the gap or said whether the features will follow.

Not a Tesla App suggests later point releases could add the parking features, since they already run on Intel-based HW3 Model 3 cars. That is a reasonable guess, not a promise from Tesla.

Other limits in 2026.38.5.1

The same software version carries the Halloween update, FSD v14.3.12 and Automatic Collision Evasion. As autoevolution notes, none of that reaches these cars: v14.3.12 and Automatic Collision Evasion are for HW4 only, and Halloween Mode does not run on Intel computers.

Reports also conflict on HW3 Model S and X with the newer AMD Ryzen screen computer. autoevolution says those cars have not received v14.3 Lite yet, though a few got earlier v14 Lite builds in limited testing. Not a Tesla App says AMD-powered HW3 S and X began getting v14 Lite in September. If you own one, check your car's own release notes rather than relying on either account.

HW3 vs. HW4

Lite remains the slimmed-down HW3 branch, distilled from the HW4 v14 model. Not a Tesla App reports Tesla has confirmed HW3 will not support unsupervised FSD or the coming v15, and has promised hardware upgrades for owners who bought FSD. Tesla has not given a date for those upgrades.

What it means for owners: if you have a pre-refresh Intel Model S or X with HW3, 2026.38.5.1 is worth installing for smoother city and highway driving. Plan to park, reverse and summon the car yourself for now. FSD (Supervised) still needs an attentive driver ready to take over.