THE SUBJECT VEHICLES ARE EQUIPPED WITH OPTIONAL ELECTRICALLY HEATED DRIVER AND FRONT PASSENGER SEATS.INFORMATION RECEIVED DURING PE03-052 DISCLOSED A SIGNIFICANT NUMBER OF INCIDENTS OF MALFUNCTIONING/OVERHEATING OF THE DRIVER SEAT HEATER IN THE SUBJECT VEHICLES.ADDITIONAL INCIDENTS MAY OCCUR DURING THE FINAL MONTHS OF THE WINTER SEASON.THIS MATTER IS ALSO CURRENTLY BEING INVESTIGATED BY TRANSPORT CANADA.THIS PE HAS BEEN UPGRADED TO AN ENGINEERING ANALYSIS (EA04-010)IN ORDER TO FULLY INVESTIGATE THESE OCCURRENCES AND THEIR SAFETY IMPLICATIONS.