2013 Mazda CX-9 service brakes problems

What owners report

• “Brakes failed while driving. Mazda dealer did not fix this known defect under recall SSP93”

  NHTSA complaint · filed 10/23/2021

• “THE BRAKE BECAME VERY STIFF AND MADE A HISSING SOUND WHEN APPLIED WHILE DRIVING. I BROUGHT MY CAR TO AN INDEPENDENT MECHANIC AND BACK TO THE DEALER WHERE I BROUGHT THE CAR AND THEY BOTH CONFIRMED THAT I NEEDED TO REPLACE THE BRAKE BOOSTER. THAT THE HISSING SOUND WAS LEAKAGE.”

  NHTSA complaint · filed 08/16/2020

• “BRAKES PEDAL ON MY WIFE'S CAR BECAME HARD WHEN PRESSED ON (REGARDLESS OF SPEED) AND NOTICED A HISSING NOISE WHEN APPLYING BRAKES. THE WORST AND SCARIEST PART IS THAT THE BRAKES DIDN'T STOP THE CAR AND FELT AS IF I WAS APPLYING THE BRAKES ON A CAR THAT WAS NOT TURNED ON. LUCKILY WE DIDN'T GET INTO ANY ACCIDENT AND STOP DRIVING THE CAR. HAD CAR TOWED TO MECHANIC WHO INFORMED ME THAT THE BRAKE BOOSTER WAS BAD AND NEEDED TO BE REPLACED. CHECKING ONLINE AND THIS APPEARS TO HAVE BEEN AN KNOWN ISSUE W…”

  NHTSA complaint · filed 06/24/2019

• “MY BRAKE PEDAL BECAME VERY HARD TO PRESS DOWN TO STOP MY VEHICLE. A HISSING SOUND WAS COMING FROM THE PEDAL. EVEN AT LOW SPEEDS 20-30 MILES PER HOUR I WAS NOT SURE IF MY CAR WOULD STOP. I WAS PRESSING DOWN ON BRAKE PEDAL HAS HARD AS I COULD. TOOK IT IN FOR REPAIR 5/22 I WAS TOLD IT WAS THE BRAKE BOOSTER ASSEMBLY THIS WAS KNOWN TO BE FAULTY IN THIS MODEL MAZDA BUT TO RECALL WAS INCORPORATED. REPAIR COST WAS $760.00 PUT OF MY POCKET.”

  NHTSA complaint · filed 05/29/2018

• “MY 2013 MAZDA CX-9 HAS 48,841 MILES ON IT. BRAKES RECENTLY STARTED MAKING A HISSING NOISE THEN BECAME HARD TO DEPRESS. I HAD A DIFFICULT TIME STOPPING THE VEHICLE TO AVOID A COLLISION ON SEVERAL OCCASIONS. ALSO, I WAS SITTING AT AN INTERSECTION WITH CONSTRUCTION AND HAD TO SIT THROUGH SEVERAL RED LIGHTS, BRAKES WERE MAKING THE HISSING NOISE AND THE VEHICLE'S RPMS STARTED FLUCTUATING AND MY CAR DIED. WHEN I PUT THE CAR IN PARK, THE RPMS STOPPED FLUCTUATING BUT AS SOON AS I PUT IT IN DRIVE WITH TH…”

  NHTSA complaint · filed 04/07/2018

• “TL* THE CONTACT OWNS A 2013 MAZDA CX-9. WHILE DRIVING 45 MPH, THE CONTACT HEARD A HISSING SOUND WHEN THE BRAKE PEDAL WAS DEPRESSED. THE VEHICLE WAS TAKEN TO BROWNING MAZDA (18827 STUDEBAKER RD, CERRITOS, CA 90703, (562) 924-1414) WHERE IT WAS DIAGNOSED THAT THE VACUUM SEALS FAILED ON THE BRAKE POWER BOOSTER, AND THE BRAKE POWER BOOSTER NEEDED TO BE REPLACED. THE VEHICLE WAS REPAIRED, BUT THE FAILURE RECURRED. THE MANUFACTURER WAS NOTIFIED AND THE CONTACT WAS INFORMED THAT THE ISSUE WAS DUE TO WE…”

  NHTSA complaint · filed 03/30/2018

• “TRIED TO STOP THE VEHICLE WHILE DRIVING AND THE BRAKE PEDAL MADE A HISSING SOUND AS IF AIR WAS ESCAPING. THE VEHICLE ALSO KEPT MOVING EVEN THOUGH THE BRAKE PEDAL WAS FULLY PRESSED TO THE FLOORBOARD. TOOK THE VEHICLE IN TO THE MAZDA DEALERSHIP THE NEXT DAY AND IT WAS CONFIRMED THAT THE BRAKE BOOSTER HAD FAILED INTERNALLY.”

  NHTSA complaint · filed 02/14/2017

• “BRAKE PEDAL BECAME VERY DIFFICULT TO DEPRESS, WITH HISSING SOUND. HAD TO FULLY DEPRESS PEDAL TO BE ABLE TO STOP FROM MODERATE SPEEDS OF 20-30MPH. RESEARCH INDICATES THE CX-9 HAS EXPERIENCED BRAKE BOOSTER FAILURE WITH THIS SYMPTOM IN PREVIOUS MODEL YEARS.”

  NHTSA complaint · filed 09/17/2016

Unverified owner reports from NHTSA's public complaint database.

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