PURCHASED VEHICLE IN 1/2008. 2008 MAZDA CX-7 WE TOOK A TRIP FROM SALT LAKE CITY, UT TO LAS VEGAS, NV THE WEEKEND OF MAY 1-3, 208. CHECK ENGINE LIGHT CAME ON, ALONG WITH THE AT LIGHT WHEN WE CLIMBED ANY SORT OF A HILL ON I-15 I MADE AN APPOINTMENT ON MAY 4TH THE MAZDA DEALERSHIP (D. DAHLE MAZDA SALT LAKE CITY) DID THE REPAIRS WHEN I PICKED UP THE VEHICLE, TRANSMISSION WAS REPROGRAMMED BECAUSE THE SHIFT POINTS WERE NOT CORRECT. MILEAGE OUT WAS 10408 ON 5/18/09 MY WIFE WAS DRIVING SOUTH ON I-15 WHEN THE CHECK ENGINE AND AT LIGHTS CAME ON AGAIN JUST NORTH OF MILE MARKER 185. SMOKE WAS COMING OUT OF THE VENTS WHEN SHE PULLEDOVER. WITNESSES RAN UP TO THE CAR YELLING FOR HER TO GET OUT, THE CAR WAS ON FIRE. DRIVERS AREA WAS FULLY ENGULFED. ALTHOUGH SHE WAS NOT INJURED (THANK GOD) IT WAS A NARROW ESCAPE ACCORDING TO WITNESSES CONTACTED MAZDA ROAD SIDE SERVICE THEY CONTACTED STEELE TOWING. FLAGGED DOWN TWO SEMI DRIVERS, THEY GOT OUT THERE FIRE EXTINGUISHERS AND DISCHARGED THEM THE VEHICLE BECAME FULLY ENGULFED, AND ENDED UP HAVING AN EXPLOSION UHP ARRIVED ON SCENE (TROOPER DEREK SPENCER BADGE # 341 ) LOCAL FIRE ARRIVED. TWO FIRE TRUCKS ATTEMPTED TO EXTINGUISH, VEHICLE WAS TOTALLY DESTROYED. VEHICLE WAS TOWED TO STEELE TOWING IN NEPHI, UT MET STEELE TOWING AT 8:00 A.M. NEXT MORNING BEFORE THE VEHICLE WAS TAKEN TO D. DAHLE MAZDA IN SALT LAKE CITY CLOSE TO 200 PHOTOGRAPHS OF THE VEHICLE AND SPOKE WITH THE TOWING COMPANY. CONTACTED ROB MEYER GENERAL MANAGER DURING OUR DRIVE HOME.