NHTSA Owner Complaint Log
This page lists owner-reported complaints filed with NHTSA for the 2016 Mazda CX-9. Complaints are unverified consumer reports submitted to NHTSA and do not by themselves prove a defect or defect rate.
I BOUGHT THE CAR SATURDAY. FOUR DAYS LATER, I FILLED THE TANK AT 2:00 PM FOR THE FIRST TIME. I THEN DROVE ABOUT 30 MILES. WHEN I ARRIVED HOME AT 5:00PM, I PARKED IN THE GARAGE. I NOTICED THE ODOR OF FUEL AS SOON AS I EXITED THE CAR AND CHECKED TO MAKE SURE I HAD SECURED THE GAS CAP, WHICH I HAD. THIRTY MINUTES LATER, THE ENTIRE DOWNSTAIRS OF OUR HOUSE SMELLED LIKE GASOLINE. THE GARAGE WAS CONSUMED WITH FUEL ODOR, AND THE FIRE POTENTIAL CAUSED US TO RETURN THE CAR TO THE DEALERSHIP IMMEDIATELY AFTER THAT. THE FUEL ODOR WAS PRESENT WITHIN THE CAR AS WELL.
ONE MILE FROM HOME THE SMART BRAKE SYSTEM MALFUNCTION & FRONT RADAR SYSTEM MALFUNCTION WAS DISPLAYED. CAR WAS SHAKING AND ACTING AS IF THE EMERGENCY BRAKE WAS ACTIVE WHILE THE CAR WAS IN MOTION. CAR WAS SLOW TO ACCELERATE. HAD I BEEN ON THE INTERSTATE I COULD HAVE BEEN REAR-ENDED. PULLED OVER TO TURN THE CAR OFF AND BACK ON. CAR WAS OKAY THE REMAINDER OF MY 20 MILE DRIVE.
Data synced from NHTSA on May 4, 2026