The contact owns a 2013 Subaru Outback. The contact stated that after driving for about two hours, she switched seats with her boyfriend. While her boyfriend was driving, there was an abnormal odor present. The contact noticed smoke under the front passenger seat. The driver was able to pull over to the side of the road. There were no warning indicator lights illuminated. The driver attempted to put out the fire. The fire department was able to extinguish the fire and disconnect the battery. The contact removed the passenger seat fuse. The passenger seat was jammed. A police report was filed. There were no reported injuries. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 173,400.