Tesla rolls out FSD 14.3.9 with new active-safety feature that intervenes before a crash
Tesla's official AI account announced the rollout of FSD Supervised v14.3.9, which adds a new active-safety feature that lets the system intervene on the driver's behalf when a collision is judged imminent, alongside an upgraded Automatic Emergency Braking system — an incremental step up in crash-avoidance for the broader owner fleet.
On September 4, Tesla's official AI account announced that FSD Supervised v14.3.9 was about to begin rolling out, built around a new set of active-safety features.
According to the announcement, FSD Supervised can now activate on the driver's behalf when it detects an imminent collision, and Automatic Emergency Braking has also been strengthened. Tesla has previously published safety-report data showing AEB substantially cuts collisions compared with manual driving, and this update builds on that track record.
The announcement didn't specify the scale of the improvement or which vehicles and regions get it first; the rollout is proceeding in stages.
For shareholders, continued safety-feature updates to FSD are a modestly positive signal. But with ongoing lawsuits and investigations tied to FSD-involved crashes, how much this improvement actually moves the needle will only become clear once Tesla publishes updated safety-report data.
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