Real progress in the right lane, but not settled: exit timing still needed my intervention, and phantom right-turn-lane signals returned late in its run.
Researching 14.3.12 before deciding on FSD? If you already own a Tesla and have not had FSD in the past year, you may be able to try it free for a month on your own roads.
What got better
On October 24, 2026, with the Halloween update and FSD (Supervised) 14.3.12, the car had gotten better about the right lane. After the early, eager moves into the far-right lane we saw on 14.3.9, that was welcome progress.
Exit timing still needed work
On our drives, the move into the exit lane could come later than I was comfortable with. I still intervened to move over earlier when a safe gap was available. I want the car to leave enough room for a calm, predictable exit rather than making that decision feel rushed.
That is where my optimism and my expectations meet: the experience keeps getting better, and I keep hoping for every part of the drive to work more smoothly.
The late regression
Toward the end of our time on 14.3.12, the car started turning on the right signal for a right-turn lane when there was no reason to move over. I thought 14.3.12 had already settled that kind of behavior, so the regression surprised me. It echoed the unexpected right-signal events we logged on 14.3.9 in late September.
| Behavior | On 14.3.12 |
|---|---|
| Right-lane behavior | Better Improved over 14.3.9 |
| Exit-lane timing | Late I still moved over earlier myself |
| Unnecessary right-turn-lane signals | Regressed Returned late in its run |
What came next
We moved to 14.3.13, which appears to fix the unnecessary signals so far, with better speed discipline in Standard mode. Read the FSD 14.3.13 review, or see every build in the version history.
Questions about FSD 14.3.12
What changed in Tesla FSD 14.3.12?
In our Model 3, right-lane behavior improved compared with 14.3.9, which it replaced directly. Exit-lane moves could still come later than I preferred, so I intervened to move over earlier when safe.
Did FSD 14.3.12 have any regressions?
Yes, in our car. Late in its run, it began signaling for right-turn lanes when there was no reason to move over. That behavior appears fixed on 14.3.13 so far.
Should I wait for a newer version than 14.3.12?
Your car receives the build Tesla sends it. Based on our experience, 14.3.13 felt steadier than 14.3.12. Read the 14.3.13 review.
Can I try FSD for free?
If you already own or lease an eligible Tesla and have not had an FSD trial or paid subscription in the past 12 months, Tesla's FSD referral program may give you a one-month trial in the Tesla app. See how it works.
Supervised means supervised. FSD (Supervised) requires an attentive driver ready to take control and does not make the vehicle autonomous. These are dated observations from one Model 3 on our own routes; behavior varies by vehicle, hardware, build, location and conditions.