TL* THE CONTACT OWNS A 2008 JEEP LIBERTY. THE CONTACT STATED WHILE DRIVING APPROXIMATELY 56 MPH HE ACTIVATED THE REAR DEFROSTER AND SMELLED A BURNING ODOR. THE CONTACT ALSO HEARD A LOUD BANGING SOUND AND NOTICED THAT THE REAR GLASS SHATTERED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE APPROXIMATE FAILURE MILEAGE WAS 64,000.