TSB: SERVICE ACTION: PANORAMIC SUNROOF INSPECTION AND REPAIR (SA270) - This bulletin provides information on some 2016MY Optima (JFa) vehicles, produced from September 28, 2015 to August 8, 2016, which may exhibit a buzzing noise that may increase with intensity in conjunction with the HVAC fan speed, a popping or clicking noise when driving over bumps or turning, and/or a loose folding cover, depending on the vehicle production date. For details regarding each type of inspection/repair, refer to its respective section below. Before conducting the procedure, verify that the vehicle is included in the list of affected VINs.
