The contact owns a 2019 Toyota Rav4. The contact stated while driving 60 MPH, the vehicle started swaying in and out the lane. There was no warning light illuminated. The contact linked the failure to the lane keep assist feature. The contact stated that the failure persisted. The contact continued to drive the vehicle and the vehicle violently jerked, forcing the contact to pull over. In addition, the contact stated that the vehicle was accelerating unintendedly upon releasing the accelerator pedal. The contact immediately pulled over and turned off the vehicle. The contact turned off the lane assist feature and proceeded to drive the vehicle at a slow speed. The contact stated that while accelerating above 35 MPH, the abnormal jerking returned. The vehicle was not repaired. Neither the dealer nor the manufacturer was notified of the failure. The failure mileage was approximately 62,000.