2014 Mazda CX-9 service brakes problems

What owners report

• “Brakes stopped working while we were on vacation. Made the drive down fine, but the next day went to drive the car, pressed the brakes and the car did not come to a complete stop. Also made a funny noise when we tried to press on the brakes. My husband practically had to stand up and push all the way down to get car to stop. Luckily we were not in a congested or confined place. Ended up replacing the brake booster. Three weeks later my acceleration stopped working intermittently. I go to press t…”

  NHTSA complaint · filed 08/12/2023

• “Breaks became very hard to press and I was having trouble stopping the car. I could not drive it to the Mazda dealer who was too far. I took a chance and drove a few miles to local break shop. They replaced the master cylinder and the break booster. Parts and labor were $1083.87”

  NHTSA complaint · filed 07/20/2023

• “When I press on my brakes, I hear air. I am fortunate that, as of this reporting, I have not had an accident. My brakes do not fully stop my car, so I have to judge when to brake in order to slow down and not hit the car ahead of me. Very scary when your car won't stop! I have read other complaints on the Mazda CX9s built in 2013 having an issue with the brake booster. PLEASE recall these 2014 Mazdas so the appropriate repairs can be made. Working brakes are ESSENTIAL!”

  NHTSA complaint · filed 07/10/2023

• “The car started creating a noise like air was leaking when i apply brake. The problem continued to increase, and braking became harder and harder. The dealer indicated that I had to replace the brake booster. This is a 2014 CX-9. A NHTSA search showed that vehicles manufactured in 2013 were affected. My car was purchased in Feb 2014. I suspect this one too had that faulty equipment.”

  NHTSA complaint · filed 01/26/2023

• “OUR 2014 MAZDA CX-9 POWER BRAKE BOOSTER HAS GOTTEN PROGRESSIVELY WORSE OVER THE LAST FEW MONTHS AND HAS NOW FAILED AT 75,269 MILES WHERE THE PEDAL IS SPONGY, PEDAL TRAVEL IS LONG AND THERE IS A HISSING NOISE (AIR LEAKAGE) FROM THE POWER BOOSTER, ALL RESULTING IN SEVERELY REDUCED BRAKE EFFECTIVENESS - VERY LITTLE. WE CANNOT SAFELY DRIVE THE CAR. THIS IS THE SAME FAILURE AND SAFETY DEFECT THAT WAS THE SUBJECT OF ODI INVESTIGATION PE-14-005 (ODI CLOSED 2/10/2014) INVOLVING 2007-2013 MAZDA CX-9 VEHI…”

  NHTSA complaint · filed 04/30/2021

• “FIRST BRAKES STARTED FAILING WERE SOFT HAD TO PUMP THEM TO STOP IN TIME AS TO NOT HIT ANOTHER VEHICLE. I TOOK MY CAR TO MY MECHANIC. HE SAID WE NEEDED TO REPLACE THE MASTER CYLINDER. DID THIS NOW BRAKES MAKE A WHOMP WHOMP SOUND AND PUSH BACK SOME. WAS TOLD TO DRIVE A FEW DAYS AND SEE IF IT GETS BETTER. DID THIS AND HUBBY WAS DRIVING THEY WERE SOFT AGAIN. THEN I TOOK CAR TODAY IT WAS FINE UNTIL I GOT HOME TO PICK UP KIDS TO TAKE THEM OUT LEFT CAR RUNNING CAME IN GOT MY KIDS WENT BACK OUT TO CAR. …”

  NHTSA complaint · filed 02/17/2020

• “VEHICLE HAS 57000 MILES HAD TO PUT INTWO MASTER CYLINDERS IN TWO YEARS. AUTO WAS IN MOTION AND COMPLETE LOSS OF BRAKES.”

  NHTSA complaint · filed 11/26/2018

• “TOLD BY DEALER THAT FRONT DISCS HAD EXCESSIVE CORROSION @ APPROX 15K AND TWO PLUS YEARS. CONTACTED MANUFACTURER WITH NO ASSISTANCE OFFERED.”

  NHTSA complaint · filed 08/12/2017

Unverified owner reports from NHTSA's public complaint database.

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