UPON MEDIUM TO HEAVY ACCELERATION, SUCH AS ACCELERATING ONTO A FREEWAY, THE VEHICLE CABIN IS FILLED WITH EXHAUST FUMES FROM THE ENGINE. THIS INJURES THE RESPIRATORY SYSTEM OF THE PASSENGERS. THEY ARE WORKING ON A FIX (AFTER MY FAMILY HAS BEEN BREATHING POLLUTED AIR FOR ALMOST TWO AND A HALF YEARS). FORD HAS FINALLY ADMITTED THAT THERE IS A PROBLEM, AND SEND ME A LETTER THAT SAID. [XXX] FORD CUSTOMER SERVICE DIVISION MARCH 7, 2014 [XXX] [XXX] SUBJECT: CUSTOMER CONCERN - EXHAUST ODOR ON 2011-2014 EXPLORER, EDGE OR MKX WE THANK YOU FOR TAKING THE TIME TO DISCUSS THE CONCERN OF EXHAUST ODOR IN YOUR VEHICLE. TO ADDRESS YOUR CONCERN ABOUT EXHAUST ODOR, WE HAVE PERFORMED SEVERAL INSPECTIONS AND SEALING ACTIONS WHERE APPLICABLE ON YOUR VEHICLE TO HELP MINIMIZE THE AMOUNT OF ODOR COMING INTO THE PASSENGER COMPARTMENT. WITH THESE CHANGES YOU MAY STILL EXPERIENCE ODOR UNDER CERTAIN DRIVING CONDITIONS SUCH AS, WHEN PERFORMING WIDE OPEN THROTTLE (WOT) ACCELERATIONS WITH THE CLIMATE CONTROL SYSTEM IN RECIRCULATION MODE. FORD MOTOR COMPANY ENGINEERS HAVE EVALUATED THE AIR ENTERING THE CABIN DURING WORST CASE DRIVING CONDITIONS (SEVERAL WOT ACCELERATIONS WITH THE CLIMATE SYSTEM IN RECIRCULATION MODE). TEST RESULTS INDICATE CABIN AIR QUALITY LEVELS ARE WELL WITHIN THE AMBIENT AIR QUALITY STANDARDS ESTABLISHED BY VARIOUS GLOBAL ENVIRONMENTAL PROTECTION AGENCIES SUCH AS THE U.S. EPA, OSHA, THE KINGDOM OF SAUDI ARABIA PRESIDENCY OF METEOROLOGY & ENVIRONMENT AND THE GOVERNMEN