The contact owns a 2016 Ford F-150. The contact stated while driving at slow speeds on several occasions, while making left or right turns, the steering wheel was shaking abnormally. The contact stated that the Steering assist fault — Service Required’ and ‘Traction — Steering Assist Failure message was displayed on several occasions. The vehicle was taken to an independent mechanic where it diagnosed and determined that the steering rack and module needed to be replaced. The vehicle was not repaired. The contact linked the failure to NHTSA Campaign Number: 15V340000 (Steering). The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline to report the failure. The failure mileage was approximately 103,000.