The contact owns a 2023 Tesla Model Y. The contact stated that while at a stop with the brake pedal depressed, the vehicle unintendedly accelerated. The contact stated that no warning lights were illuminated. The contact stated that she rear-ended the vehicle in front as she turned the steering wheel to the left and landed in a ditch. No air bags deployed. The contact stated that she and her front-seat passenger sustained no injuries however the other vehicle driver was seen by the EMTs on the scene. A police report was filed. The vehicle was towed to an authorized Tesla Center and was awaiting diagnosis. The manufacturer was notified of the failure and a case was opened. The contact stated that she was informed by the manufacturer that a diagnosis team was working on the diagnosis. The approximate failure mileage was 473.