The contact owns a 2016 Fiat 500X. The contact stated while driving 30-35 MPH, several messages stating that the 4-WD system and the drive mode selector system were not available were displayed. The vehicle was taken to the dealer, where a computer software update was performed, per the manufacturer’s recommendation; however, the failure persisted. The contact stated that the failure recurred upon starting the vehicle. The vehicle was taken back to the dealer, where the cause of the failure could not be determined. The vehicle was not diagnosed or repaired. The manufacturer was notified of the failure, but no further assistance was provided. The failure mileage was approximately 73,000.