Vehicle was purhased in early June 2021. Vehicle was being operated on State Highway Route 55 at Milepost 46.7, in Elk Township, Gloucester County. Traffic was heavy, with southbound transient traffic traveling to New Jersey Shore points. Vehicle simultaneously lost power and began to display several error/warning messages on dashboard at approximately 13:52 hours. Vehicle was pulled to the right shoulder of the roadway and I began to smell something burning. As I removed personal effects from vehicle I exited and saw smoke coming from the passenger's side wheel well. I walked back approximately 100 feet and called 911, by time a dispatcher came answered, the engine compartment of the vehicle was completely engulfed in flames. No modifications of any kind were done to the vehicle since its purchase. I was the sole occupant of the vehicle and not injured. The vehicle is fully insured and payments are current. It's mileage at the time of the incident are 3,042. That information along with the error messages were provided through the Subaru Starlink App.