NHTSA Complaint #11699446 — 2024 TESLA MODEL Y

I am writing to report critical safety issues I’ve experienced while using Tesla’s Full Self-Driving (FSD) software version 14.1.3. The recent update has introduced several dangerous behaviors that were not present in previous versions. One issue occurs frequently on neighborhood roads: the vehicle performs sudden emergency braking for no valid reason. For example, during one drive, it abruptly stopped because a few leaves blew across the road. There were no pedestrians, vehicles, or real obstacles present. These false-positive braking events are alarming and could easily cause a rear-end collision. An even more concerning issue arises during highway driving. The car now repeatedly swerves partially into adjacent lanes—without signaling—and then abruptly returns to its original lane. This happens constantly, even in light traffic, and it did not occur in previous versions of the software. This erratic behavior is incredibly dangerous and could easily cause sideswipe accidents or create confusion for surrounding drivers. It is clear that version 14.1.3 is a regression from earlier versions. The system’s decisions are more erratic, less confident, and frequently unsafe. I no longer trust the FSD to operate reliably in environments where it previously performed well. I urge your agency to investigate this software update as it presents a real and growing hazard on public roads.