The contact owns a 2026 Tesla Model Y. The contact stated that while driving 40 MPH with the Full Self-Driving mode engaged, the vehicle suddenly swerved into the left lane, and the rear passenger’s side door struck the right side of another vehicle. The vehicle stopped after the impact. The air bags did not deploy. The vehicle did not need to be towed. There was no warning light illuminated. Additionally, the Forward Collision Avoidance feature was not activated during the failure. A Police report was filed. There was no injury reported. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was 3,609.