Tesla Adds FSD v14.3 Lite to Intel Model S/X with 2026.38.5.1

The Tesla Super Intelligence account on X announced the rollout of FSD v14 Lite to Intel-powered HW3 Model S and Model X, marking the first time these legacy vehicles are receiving the distilled FSD branch.

It is arriving as FSD (Supervised) v14.3 Lite with software update 2026.38.5.1. Tesla owner Leonard Campagna (@LeonardCampagna) already has the update on his family’s two Model X vehicles and has tested it, outlining what is included and what is not.

What Intel Model S/X Owners Get

FSD v14 Lite is a distilled version of the main FSD v14 software designed to run on HW3’s older, memory-constrained computer. According to the release notes, Tesla “Distilled the intelligence from HW4 V14 into HW3,” bringing over improvements such as reinforcement learning. The update also lists better handling of merges, pedestrians, traffic lights, and cut-ins, along with fewer false slowdowns and smoother steering.

On Intel Model S and Model X, FSD v14.3 Lite includes Speed Profiles and an FSD streak counter that tracks distance driven without an intervention, the latter not mentioned in the notes. However, these vehicles do not receive Arrival Options, starting FSD from Park, or reversing on FSD—features that HW3 Model 3 and Model Y vehicles with Intel processors do get with v14.3 Lite. The ability to autonomously reverse first appeared on HW4 with version 13.2, but HW3 cars remained on v12 until v14 Lite. Smart Summon isn’t included either.

A Long Wait for Legacy Vehicles

FSD v14 Lite went public earlier this summer for Model 3 and Model Y only. Tesla confirmed Model S and Model X support in early September, and AMD-powered HW3 Model S and Model X began receiving it later that month. Tesla started rolling out FSD v14.3 Lite earlier this month, and it is now reaching Intel Atom-powered vehicles as well.

Update 2026.38.5.1 also brings Halloween Mode to the FSD branch, but Halloween Mode isn’t supported on Intel vehicles, so these owners won’t see it.

The End of the Line for HW3

FSD v14 Lite is expected to be the last major FSD branch for HW3, whether Intel or AMD. Tesla has confirmed that HW3 won’t support unsupervised FSD or the upcoming FSD v15 update, and it has promised hardware upgrades with new, more powerful AI chips for owners who purchased FSD.

Until those upgrades arrive, v14.3 Lite is the most advanced FSD experience available to legacy Model S and Model X owners. Future point releases could still add the missing parking features, as they already exist on Intel-based HW3 Model 3.