Tesla pulls FSD update minutes after rollout began

Tesla ↗ 4.23% began pushing Full Self-Driving (Supervised) v14.3.9 to customer vehicles on Tuesday afternoon and withdrew the pending update from owners' cars within roughly 20 minutes, according to multiple owners who had been downloading it. The company has offered no explanation for the reversal.

The release, packaged as software update 2026.27.6, carried the first new capability in the 14.3 branch since mid-summer: a feature called Automatic Collision Evasion, which can engage FSD while a driver is operating the car manually if the system judges a frontal collision to be imminent or determines the driver is inattentive.eletric-vehicles+1

A Brief Window

"Tesla FSD V14.3.9 just officially started rolling out," Sawyer Merritt, a Tesla investor and content creator, wrote on X at 5:35 p.m. Central time, posting in-car release notes and noting he was downloading the update on his Model Y. About 15 minutes later he wrote: "Looks like Tesla temporarily pulled the pending software update from everyone's cars. Not sure why." Another owner, posting as @BLKMDL3, replied that the update had "disappeared from all my cars".eletric-vehicles

The employee build, version 2026.27.5, had been documented by September 6, and the public build reached AI4-equipped customer vehicles on Tuesday before being pulled.gettesla+1

What the Feature Does

According to Tesla's owner's manual and release notes, Automatic Collision Evasion activates FSD to steer, brake, or accelerate when braking alone may not prevent a frontal collision. The system can also engage when the cabin camera detects the driver is not sufficiently attentive — for instance, reaching toward the back seat — or when FSD has been unintentionally disengaged.electrek+3

For the collision scenario, the car must be on a controlled-access highway below 85 mph with no pedestrians or cyclists in the path, a functional steering system, and dry road conditions. For the inattention scenario, the system operates between 22.5 and 85 mph on any road type. A firm steering input overrides the maneuver.eletric-vehicles+1

The feature requires an FSD purchase or subscription and is limited to AI4 (HW4) vehicles in North America. It marks the first time Tesla has allowed its supervised driving system to take control of a car the driver — not the software — is actively operating.electrek+1

Unanswered Questions

Tesla has not commented publicly on why the update was withdrawn. The 14.3 branch has had a rough stretch: owners reported braking regressions on v14.3.6 in late July, and v14.3.7 in early August was received as a fix. Whether the Tuesday pullback reflects a similar bug or a more routine issue remains unclear.eletric-vehicles