Tesla Begins Rolling Out FSD v14.2 Lite to HW3 Model S, Model X

Rollout Reaches Older Hardware

Tesla has started rolling out a new version of its Full Self-Driving software, FSD v14.2 Lite, to Model S and Model X vehicles running Hardware 3 (HW3), according to Not a Tesla App. The update marks a continuation of Tesla's effort to extend newer FSD capabilities to owners who have not yet transitioned to the company's more recent Hardware 4 computer.

What the "Lite" Label Means

The "Lite" designation in the version name typically signals a version of the software tailored to run within the more limited computational constraints of older hardware. Tesla has previously used similar naming conventions when adapting FSD releases for HW3 vehicles, which do not have the same processing power as HW4-equipped cars. Details on the specific feature set or performance differences between this build and the standard v14.2 release were not included in the report.

Model S and Model X are among Tesla's longest-running vehicle lines, and a portion of the fleet still operates on HW3 hardware, as Tesla has gradually shifted new production toward HW4 in recent years. The staggered rollout approach — bringing updates to HW4 vehicles first before adapting and releasing versions for HW3 — has become a familiar pattern for Tesla's FSD program.

Ongoing Software Expansion

As with previous FSD updates, the rollout is expected to expand gradually to eligible vehicles rather than arriving for all owners simultaneously. Not a Tesla App did not report additional specifics such as an exact release timeline, the total number of vehicles receiving the update, or a detailed changelog for v14.2 Lite. Tesla has not issued a separate public statement on the update beyond its appearance in the software rollout.

Owners of HW3 Model S and Model X vehicles are advised to check their in-car software update notifications to determine whether v14.2 Lite has become available for their vehicle.

Source: Not a Tesla App