The contact owns a 2010 Chevrolet Malibu. The contact stated while driving 30-40 MPH, the power steering assist warning light illuminated. The contact stated while making a left turn, the vehicle became difficult to maneuver and the steering wheel vibrated. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 120,000.