The contact owns a 2008 328i. The contact stated while driving 30 MPH, the vehicle was making abnormal sounds. There was no warning light illuminated. The contact stated he smelled a burning odor and parked the vehicle. The contact looked under the hood and did not see any damage. The contact restarted the vehicle to drive home and heard a loud noise coming from the engine and vehicle started overheating. After arriving home, the contact opened the hood and became aware that the hood insulation was missing, and the PCV hose was leaking oil. The vehicle was towed to an independent mechanic and the vehicle was repaired. The manufacturer was notified of the failure. The failure mileage was 102,000.