CAR SEAT HEATER BURNED NICKEL-SIZED HOLE IN LOW-BACK OF DRIVER SEAT. IT WAS A REPLACEMENT FOR THE ORIGINAL AND WAS IN USE 13 MONTHS. DRIVER WORE LEATHER JACKET WHICH PREVENTED INJURY. HEATER HAD BEEN ON ABOUT 20 MINUTES. DEALERSHIP DESCRIBED THIS UNIT ON SERVICE RECORD AS HAVING HAD INTERNAL DEFECT. THEY REPLACED UNIT AT DRIVERS EXPENSE, REFUSED REPAIR FOR HOLE IN LEATHER SEAT BACK. EVENT OCCURRED NOVEMBER 2010. *TR