What 221 owners told NHTSA about the 2012 Mazda Cx-90 Phev

I was driving along the highway and traffic began to slow. I pushed the brakes and the car did not stop.

NHTSA ODI 11446811

Brake booster failure caused a near miss. Wife driving with 5 year old daughter in the vehicle. The stopping force required on the brake pedal became excessive and the stopping (safe braking) distance significantly increased causing emotional distress. My understanding is this part (brake booster) has a defective diaphragm that deteriorates over time. The extended warranty created for this particular issue did not cover the vehicle at the time of the failure.

NHTSA ODI 11435560

THE BRAKING SYSTEM DID NOT FUNCTION CORRECTLY RESULTING IN A CRASH. BRAKES WERE HARD AND COULD NOT BE DEPRESSED WHEN A VEHICLE STOPPED QUICKLY IN FRONT OF ME. TOOK THE CAR TO MAZDA DEALERSHIP AND THEY INFORMED ME THAT THIS IS A KNOWN PROBLEM AND REPLACED THE BRAKE BOOSTER UNDER A "SPECIAL WARRANTY". THIS NEEDS TO BE A SAFETY RECALL, I WAS NEVER NOTIFIED OF THIS SAFETY ISSUE. IT IS IMPERATIVE THAT NHTSB REOPEN THE INVESTIGATION ON THIS PROBLEM AS IT DOES NOT ONLY INVOLVE 2010 AND 2011 CARS AND DOES NOT ONLY OCCUR IN "HIGH AMBIENT TEMPERATURES". VEHICLE WAS IN MOTION AND WAS SLOWING ON AN SLIGHT UPHILL GRADE. VEHICLE IS 5 YEARS OLD AND HAS 53,000 MILES.

NHTSA ODI 11078853

I'VE PURCHASED 2012 MAZDA CX-9 AWD IT LATE NOVEMBER OF 2011.RECENTLY I'VE BEEN EXPERIENCING MULTIPLE UNEXPECTED LOSS OF POWER-ASSISTED BRAKES FAILURE INCIDENT .I WAS IN A MINOR FENDER BENDEER. THANK GOD THE DRIVER INFRONT WAS VERY NICE AND DIDNT FILE ANY CLAIM AGAINST MY INSURANCE. WHEN I BROUGHT MY VEHICLE INTO MAZDA SERVICES DEPARTMENT TO GET IT RESOLVE. INSTEAD OF TAKING UNEXPECTED LOSS OF POWER-ASSISTED BRAKES AS AN URGENT MATTER. THEY TOLD ME THAT MY CAR IS DRIVABLE AND IT STILL BREAK. I CAN DRIVE MY MAZDA IN THE MEANWHILE, UNTIL THEY HAVE AN OPEN APPOINTMENT FOR MY MAZDA TO BE SEEN. AFTER SPEAKING TO MULTIPLE PERSONEL AT THE SERVICES DEPARTMENT. THEY WERE ABLE TO TAKE MY MAZDA AND FIXED THE UNEXPECTED LOSS OF POWER-ASSISTED BRAKES. NOW IM EXPERIENCING SPEED CONTROL AND POWER TRAIN. I WAS AT A STOP LIGHT AND MY MAZDA STALLED IN THE MIDDLE OF A LEFT TURNING LANE, IN ADDTION TO THE STALL INCIDENT, I WAS ALSO EXPERIENCING THE TRACTION CONTROL LIGHT CAME ON AND THE TIRE PRESSURE MONITOR LIGHT BEGAN TO FLASH. IT FELT LIKE CAR HAD DOWNSHIFTED A COUPLE OF GEARS. I LOST FORWARD POWER IN ALL GEARS. MY SONS AND I CAME CLOSE TO MULTIPLE REAR-ENDED INCIDENT BECAUSE OF THE MECHANICAL ISSUE OF OUR MAZDA CX9. PLEASE BECAREFUL WHEN DECIDING TO PURCHASED YOUR MAZDA VEHICLE. *TR

NHTSA ODI 10626643

I HAD AN INCIDENT YESTERDAY RESULTING IN A MINOR COLLISION. MY ACCELERATOR STUCK, MY ENGINE KEPT REVVING, AND I COULD NOT STOP. I KEPT APPLYING THE BRAKES BUT IT FELT AS IF EVERYTHING LOCKED UP. I REARENDED THE PERSON IN FRONT OF ME NO DAMAGE TO THEIR CAR AND ONLY MINOR TO MINE. I AM NOW AFRAID TO DRIVE THE VEHICLE. MY HUSBAND CONTACTED THE DEALERSHIP AND THEY ARE WAITING TO HEAR BACK FROM MAZDA CORPORATE. *TR

NHTSA ODI 10493756