NHTSA Complaint #11349951 — 2016 MAZDA CX-9

MY WIFE AND DAUGHTERS TOOK A TRIP, AND ON THE WAY HOME, THE ENGINE LIGHT CAME ON. WHEN TURNING ON THE ENGINE TO CHECK THE ENGINE LIGHT, I NOTICED THAT THE BRAKE PEDAL WAS HARD. I WAS THINKING THE ENGINE LIGHT HAD TO DO WITH THE GAS CAP NOT BEING ON TIGHT SINCE FAMILY PURCHASED GAS ON THE TRIP BACK HOME. I DROVE THE CX-9 TO AUTOZONE TO DETERMINE THE CODE FOR THE ENGINE LIGHT. THE ATTENDANT AT AUTOZONE WAS UNABLE TO REGISTER A CODE. HOWEVER, I NOTICED THE BRAKES FELT DIFFERENT ON THE DRIVE TO AUTOZONE. ALTHOUGH I HAD TO APPLY MORE PRESSURE TO STOP, IT TOOK LONGER TO STOP. IT ROLLED TO A STOP. WHEN I GOT BACK HOME, I HEARD A HISSING SOUND COMING FROM UNDER THE DASHBOARD. MAZDA'S OWNER'S MANUAL REGARDING THE ENGINE LIGHT INDICATES 1.) THE FUEL TANK LEVEL BEING VERY LOW, 2.) POSSIBLE ELECTRICAL SYSTEM PROBLEM, 3.) EMISSION CONTROL PROBLEM, OR 4.) FUEL FILLER CAP IS MISSING OR LOSE. THE NEXT MORNING I DROVE THE CX-9 TO SEE IF TIGHTENING THE GAS CAP WOULD CORRECT THE ENGINE LIGHT. DURING THE DRIVE, THE BRAKING SEEMED DIFFERENT. I WOULD PRESS THE BRAKE, BUT THE VEHICLE WOULD ROLL TO A STOP INSTEAD OF STOPPING. WHEN I WAS APPROACHING A CAR STOPPED AT A RED LIGHT, I HAD TO PRESS THE BRAKE VERY HARD TO AVOID THE VEHICLE. I PARKED IT AND CALLED THE LOCAL MAZDA DEALER. AFTER THEY PERFORMED A DIAGNOSTIC TEST, THE BRAKE BOOSTER WAS DETERMINED TO BE FAULTY. I WAS CONFUSED ABOUT HOW A BRAKE BOOSTER AND AN ENGINE LIGHT CORRELATES. I'M ALSO TRYING TO UNDERSTAND WHY THE BRAKE SYSTEM WARNING LIGHT WAS NOT ACTIVATED SINCE THIS RELATES TO THE BRAKING SYSTEM. AFTER ADDITIONAL RESEARCH, I'M IN COMPLETE DISBELIEF THAT MAZDA IS AWARE, AND IT HAS NOT DECIDED TO ADDRESS THIS SAFETY ISSUE. PLEASE TAKE ACTION TO HAVE MAZDA RECALL THE BRAKE BOOSTERS TO ADDRESS THIS ISSUE SINCE IT'S AWARE THE PROBLEM IS AN EQUIPMENT/MATERIALS ISSUE.