FSD v14.3 Lite 首次推送老款 Model S/X：Intel 版 HW3 车辆终于跟上
Tesla Rolls Out FSD V14 Lite to Legacy Model S/X for First Time
特斯拉开始向搭载 Intel 芯片的 HW3 老款 Model S 和 Model X 推送 FSD（Supervised）v14.3 Lite，随软件更新 2026.38.5.1 到达。这是这些老车首次获得从 HW4 v14 蒸馏而来的 Lite 分支，包含汇入、行人、交通灯与加塞处理等改进，以及更少的误减速和更平顺的转向，还带有速度模式和无干预行驶里程计数。不过老款 S/X 版本缺少到达选项、从驻车状态启动 FSD 和 FSD 倒车——这三项在 HW3 的 Model 3 和 Model Y 上已有——智能召唤也未包含在内。原文称 v14 Lite 预计是 HW3 的最后一个大版本分支，HW3 不会支持无监督 FSD 和后续的 v15。
FSD 大版本首次覆盖到 Intel 版老款 S/X、且被定位为 HW3 的收官分支，对老车主的可用功能与后续硬件升级预期有实质信息量。原文已读完，版本号、更新号、缺失功能清单均逐项核对原文。
Owners of legacy Model S and Model X vehicles are finally getting Tesla’s latest FSD build for HW3. The official Tesla Super Intelligence account on X announced that FSD v14 Lite is now rolling out to Intel-powered HW3 Model S and Model X, marking the first time these older vehicles have received the distilled FSD branch.
It’s arriving as FSD (Supervised) v14.3 Lite with software update 2026.38.5.1. Tesla owner Leonard Campagna (@LeonardCampagna) already has it on his family’s two Model X vehicles, and he tested it and shared what’s included (and what isn’t).
It is now installed on my wife’s 2017 Model X, and finishing installing on mine. We will test both tomorrow with video. pic.twitter.com/z4bLBngLeA
— Leonard Campagna Freedom=Happiness=Freedom (@LeonardCampagna) October 14, 2026
What Intel Model S/X Owners Get
FSD v14 Lite is a distilled version of the main FSD v14 software built to run on HW3’s older, memory-constrained computer. The release notes say Tesla “Distilled the intelligence from HW4 V14 into HW3,” bringing over improvements like reinforcement learning. They also list better handling of merges, pedestrians, traffic lights and cut-ins, along with fewer false slowdowns and smoother steering.
FSD v14.3 Lite for Intel Model S and Model X includes Speed Profiles and an FSD streak counter that tracks how far you’ve driven without an intervention, the latter of which wasn’t mentioned in the release notes. However, legacy Model S and Model X vehicles miss out on Arrival Options, starting FSD from Park, and reversing on FSD, all of which HW3 Model 3 and Model Y vehicles with Intel processors get with v14.3 Lite. FSD first got the ability to autonomously reverse on HW4 with version 13.2, but HW3 cars were stuck on v12 until v14 Lite arrived. Actually Smart Summon isn’t included either.
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A Long Wait for Legacy Vehicles
FSD v14 Lite went public earlier this summer, but only for Model 3 and Model Y. Tesla confirmed Model S and Model X support in early September, and AMD-powered HW3 Model S and Model X started getting it later that month. Tesla began rolling out FSD v14.3 Lite earlier this month, and it’s now reaching Intel Atom-powered vehicles too.
Update 2026.38.5.1 also brings Halloween Mode to the FSD branch, but Halloween Mode isn’t supported on Intel vehicles at all, so these owners won’t see it.
The End of the Line for HW3
FSD v14 Lite is supposed to be the last major FSD branch for HW3, 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 bought FSD.
Until those upgrades arrive, v14.3 Lite is the best FSD experience legacy Model S and Model X owners can get. Future point releases could still add the missing parking features, as they already exist on Intel-based HW3 Model 3.
来源：MyTesla 编辑台 · notateslaapp.com