What changed in FSD 14.3.10

Official notes still say 14.3.9

Tesla started rolling FSD (Supervised) 14.3.10 on September 18, 2026 in firmware 2026.27.10. The FSD bullets on the 14.3.10 version card match the list on 14.3.9. In the car, that list still opens with "Full Self-Driving (Supervised) v14.3.9 includes:" under a 14.3.10 header. We are not inventing a new stack list.

So a 14.3.10 card can look the same as 14.3.9. The version number moved. The published FSD notes did not. Sawyer Merritt said 14.3.10 started rolling out with the same release notes. Tim’s Cybertruck screenshots show the same header quirk.

The carried notes still cover the v14.3 stack: a reinforced-learning training stage, a vision-encoder upgrade, the MLIR compiler rewrite Tesla says cut reaction time by about 20%, plus parking, emergency-vehicle, traffic-light, and driver-monitoring items that landed earlier. Automatic Collision Evasion stays on this HW4 build.

Automatic Collision Evasion is still present

What changed in FSD 14.3.9 is where ACE first showed up on the tracker, on firmware 2026.27.6. 14.3.10 keeps it. Tim’s in-car screenshots and Teslascope use Tesla’s wording:

Automatic Collision Evasion activates Full Self-Driving (Supervised) to try to keep your vehicle safe and then continue driving. It can engage while you are driving manually and detects that you are not sufficiently attentive to the road (for example, reaching toward the back seat), or that Full Self-Driving (Supervised) may have been unintentionally disengaged.

See your Owner’s Manual for more details.

That is still FSD (Supervised). Automatic Collision Evasion is an active-safety path that can bring Supervised in while you drive manually, in the situations Tesla describes above. It is not unsupervised consumer FSD. It is not a Robotaxi launch.

Hardware 3 Lite on the same firmware

Firmware 2026.27.10 is a split package, like 2026.27.6 before it. Hardware 4 vehicles (Model S, 3, X, Y, Cybertruck) get 14.3.10. Hardware 3 Model 3 and Model Y stay on FSD 14.2 Lite. Lite notes did not change. Lite does not get ACE. See What changed in FSD 14.2 Lite.

This recap is the 14.3.10 card only.

Product context

This page is about FSD (Supervised) owner software. FSD Supervised can start from park, change lanes, follow navigation, and park at a destination. Robotaxi is a separate Tesla app and service. FSD Update is independent and not affiliated with Tesla, Inc.

If you are comparing versions on the road, a USB drive for Dashcam and Sentry is the usual owner setup. We link a 128GB Tesla Dashcam / Sentry USB. For non-Tesla Level 2 stations, use a J1772-to-Tesla adapter (not a Tesla-to-J1772 dongle).

Related: Tracker fsdupdate.com. Also on FSD News: What changed in FSD 14.3.9, What changed in FSD 14.2 Lite. The 14.3.10 version card is FSD 14.3.10 (recap lives there).

Public notes for 2026.27.10: Teslascope 2026.27.10. Early-access screenshots from TimDOES, BLKMDL3, and DirtyTesLa. NotATeslaApp had not listed 14.3.10 at publish time.

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