While driving down the highway going approximately 55 MPH, the vehicle lost power in the middle of the highway and shut off completely, with a sudden warning that said Engine Malfunction. The vehicle stopped in the middle of the highway and smoke began filling the cabin, leaving me to believe there was a fire under the hood. I evacuated the kids out of my car and pushed it off to the side of the road, then called the fire department. When the vehicle was towed to a Nissan dealership they discovered that there were many large metal chunks in the oil pan and the engine needed to be completely replaced. The vehicle only has 50,000 miles on it and is technically covered under powertrain, however Nissan is trying to get out of covering the replacement of the engine. There have been many documented cases of this exact thing happening to this make model and year Rogue. Nissan needs to take responsibility before someone dies. This incident was incredibly dangerous and could have ended catastrophically had I not pushed the car off the roadway.