Tesla has started pushing a revised version of FSD (Supervised) v14 Lite to its older Hardware 3 cars. Tesla Oracle reported on August 11, 2026 that the new build is called FSD v14.1 Lite and ships inside firmware version 2026.21.6, and that it began as a limited early-access release around August 8–9 rather than going out to every eligible car at once.
What v14 Lite was meant to do
Hardware 3 is the Autopilot computer in Model 3 and Model Y cars built roughly through 2023. Those cars could not run the full v14 software that newer Hardware 4 cars got, so Tesla built a cut-down version. According to the official release notes for the v14 Lite build, the software “distills” the intelligence of the Hardware 4 version of v14 down to what Hardware 3 can run, and adds parking, unparking and reversing, a dedicated Self-Driving app in the app launcher, a “Start Self-Driving from Park” button, and a new SLOTH speed profile that drives more conservatively than CHILL.
Those same release notes are blunt about what the software is not. FSD (Supervised) “does not make your vehicle autonomous” and requires the driver to stay attentive and be ready to take over at any time.
Why there is a second build
The first v14 Lite release reached Hardware 3 owners in stages through the summer — Tesla Oracle tracked the initial rollout starting in late June with firmware 2026.20.5.1 and a wider release on July 21. After that, some owners reported an Autopilot computer temperature warning, with the car logging the message that the Autopilot control unit board temperature was outside its recommended operating range.
Tesla Oracle notes that the official release notes did not change between v14 Lite and v14.1 Lite, which suggests the new build is aimed at that thermal behavior rather than at adding features.
What this means if you own a Hardware 3 car
Rollouts like this one go out in waves, so a version number appearing in the news does not mean it is waiting on your screen tonight. Check Controls > Software in the car for what your vehicle is actually running. If you have been offered v14 Lite and have seen a temperature warning, the newer build is the one Tesla is moving toward — but as of mid-August 2026 it is still going out gradually.
Dirty Tesla drove the Hardware 3 version and compared it directly against the Hardware 4 software on their channel:
That video is one owner’s hands-on impression, not a Tesla statement — useful for seeing how the software behaves on an older car, but the release notes above are the record of what actually shipped.
Photo by Borys Zaitsev.