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What 138 owners told NHTSA about the 2014 Mazda Mazda3 Sedan

These are the actual owner complaints behind this car’s reliability verdict, filed with the federal government, unedited. They’re unverified reports, not confirmed defects: read them as leads for your pre-purchase inspection, not a diagnosis.

All (138)Crash / fire / injury (12)Electrical system (27)Fuel system (24)Brakes (22)Engine (13)Backup camera & sensors (11)Speed control (9)Parking Brake (8)Transmission & drivetrain (7)Seat belts (5)Visibility & wipers (5)

3 of 138 complaints match · Speed control · crash/fire/injury only · clear filters

Aug 21, 2017Speed controlCrash

I WAS TURNING SLOWLY INTO A PARKING SPACE BETWEEN TWO PARKED CARS WITH MY FOOT ON THE BRAKE. APPROXIMATELY 1/4 TO 1/3 OF THE WAY INTO THE SPACE THE CAR SUDDENLY ACCELERATED (MY FOOT STILL ON THE BRAKE). IT JUMPED THE CURB, CROSSED OVER THE SIDEWALK, "TOOK OUT" 2 PILINGS AND LARGE FLOWER BOX AND THEN STOPPED. ENGINE WAS STILL RUNNING. IT HAPPENED IN A MATTER OF SECONDS AND I HAD NO TIME TO REACT IN ANY WAY. CAR HAD TO BE WINCHED OFF OF THE PILINGS WHICH NOW HAVE TO BE RESET APPROX. 15" - 18" INTO THE GROUND. I HAVE PHOTOS TAKEN BY A NEIGHBOR, BUT DO NOT KNOW HOW TO UPLOAD THEM. TOW TRUCK DRIVER TOOK SOME TO SHOW TO THE INSURANCE ADJUSTER.

NHTSA ODI 11018647

Jul 27, 2016AirbagsSpeed controlEngineCrash

MY 2014 MAZDA 3 SUDDENLY AND UNEXPECTEDLY ACCELERATED AND CRASHED INTO A PARKED TRUCK. THERE WAS AN EYE-WITNESS. HERE IS WHAT HAPPENED: I WAS DRIVING ON A QUIET, DEAD-IN STREET ACCOMPANIED BY MY HUSBAND. I TURNED LEFT INTO THE TURN AROUND AREA AT THE END OF THE STREET. AS I WAS COMING TO A STOP, WITH MY FOOT ON THE BRAKE, THE CAR SUDDENLY ACCELERATED'GOING VERY FAST, VERY QUICKLY. IT LEAPT OVER THE CURB, NARROWLY MISSED A TREE AND A FIRE HYDRANT, PASSED BACK OVER THE STREET I HAD BEEN ON MOMENTS EARLIER, AND CRASHED INTO A PARKED PICK-UP TRUCK. THE AIR-BAGS DID NOT DEPLOY. ALL OF THIS HAPPENED IN 2 TO 3 SECONDS. WE WERE NOT HURT. THE EYE WITNESS WAS IN HIS YARD, WHICH ADJOINS THE TURN-AROUND AREA. AFTER THE ACCIDENT, HE CAME OVER AND ASKED IF I WAS OK. HE ASKED ME IF I COULD TURN MY CAR OFF. THE EYE WITNESS LATER TOLD ME HE HAD SEEN THE WHOLE THING AND THAT I NEVER HAD CONTROL OVER THE CAR. HE SAID HE TOLD THE POLICE THAT HE WAS WATCHING ME TURN MY CAR INTO THE TURNAROUND AREA AND SAW THE CAR SUDDENLY ACCELERATE. HE WANTED ME TO KNOW THAT THERE WAS A MECHANICAL PROBLEM WITH MY CAR. HE TOLD ME THAT WHEN HE APPROACHED THE CAR, IT WAS REVVING AND STILL TRYING TO ACCELERATE INTO THE TRUCK, EVEN THOUGH MY FEET WERE NOWHERE NEAR THE PEDALS. THAT WAS WHY HE ASKED IF I COULD TURN THE CAR OFF. I REMEMBERED BEFORE TURNING THE CAR OFF, THAT I COULD HEAR THE WHINE OF THE ENGINE AS IT SOUNDS WHEN IT IS AT HIGH RPMS. THE UNEXPECTED ACCELERATION AND THE FACT THAT THE AIR-BAGS DID NOT DEPLOY ARE BOTH SERIOUS SAFETY CONCERNS. THE CAR WAS TOWED TO THE MAZDA DEALERSHIP AND THE SERVICE DEPARTMENT CONTACTED MAZDA CORPORATION WHO SENT AN ENGINEER TO CHECK IT OUT. THEY SAID THEY COULD NOT FIND A PROBLEM, BUT THEY PUT AN EVENT DATA RECORDER ON THE CAR TO MONITOR IT. THEY DROVE THE CAR FOR A FEW DAYS AND NOTHING SHOWED UP. THE DEALER BOUGHT THE CAR BACK.

NHTSA ODI 10888959

Jul 11, 2016Transmission & drivetrainSpeed controlCrash1 injury

AS I WAS TURNING INTO A PARKING SPOT TO PARK MY CAR, THE CAR ACCELERATED ON ITS OWN AND RAN INTO A CONCRETE WALL. I HAVE HAD ISSUES WITH THIS CAR'S PROGRAMMING, INCLUDING WHEN I TOOK MY CAR IN TO GET FIXED AFTER THE SAFETY RECALL IN JANUARY '16. AS I REALIZED THE CAR WAS ACCELERATING - AND PUSHING ON THE BRAKE WOULD NOT STOP IT - I LIFTED THE EMERGENCY BRAKE. THE CRASH ULTIMATELY STOPPED THE CAR - NOT THE BRAKE OR EMERGENCY BRAKE, AND THE AIRBAG DEPLOYED. LESS CONCERNED ABOUT THE DAMAGE TO THE OUTSIDE OF THE CAR, AND MORE CONCERNED THAT I HAD ZERO CONTROL OVER THE CAR AND ANY ABILITY TO STOP IT.

NHTSA ODI 10884129

Working with the data? Download all 138 complaints as CSV · fetched from NHTSA July 18, 2026

How to use these: a complaint is one owner’s report, filed voluntarily and published unverified. Patterns matter more than any single story. If several owners describe the same failure at similar mileage, put that system at the top of your pre-purchase inspection list. Back to the full 2014 Mazda Mazda3 Sedan verdict →