2010 MAZDA CX-9 Service Brakes Problems

Stiff brake pedal , more effort to stop and longer distant to stop.

My wife was taking my daughters for marching band and all of a sudden she tried to press the brakes but the brakes felt too hard and she was unable to stop the car safely. She had to take immediate action by moving the car to the shoulder to stop the car. There were no warning signs on the screen. The car was taken to the mechanic and the dealership. The dealership said that this was a brake booster issue which would be fixed for $1500. This is a serious issue which if had happened on the highway would have been tragic. Mazda and the dealership refuse to fix this free of cost since they say that they had already communicated about "an extension of warranty" to fix this problem in 2015 - at which time there were no issues with the brakes.

Vehicle difficult to stop, believe it is a bad brake booster.

Braking inconsistently - sometimes easy to stop, sometimes hard. I had brakes looked at, and the man said it was the brake booster. He googled it, and found a recall online and told me to take it to my dealer. It doesn't look like there's an active recall - but a lot of complaints. What's going on? This is going to be expensive. My college age daughter drives that car. Do they have to have a severe accident to get that fixed? I can't afford to fix it right now.

Mileage: 120,000

Brakes not working due to brake booster problem which was brought to the attention of Mazda. Mazda and the transportation authority agreed on an extended warranty which is no longer in effect. There have been many more complaints for this same problem, yet a recall has not been listed for this vechicle and alot of people are paying out of pocket. I already brought this to the attention of traffic safety and never received a return reply. Brakes are squishy than you end up having to put brakes all the way to get car to stop. People are unaware of this major brake and safety defect

Mileage: 94,000

Driving and brakes would not work without pressing really hard. The problem was reported before on these cars and continue to be a problem. https://www.carcomplaints.com/Mazda/CX-9/2010/brakes/stiff_difficult_braking.shtml my car has been in 2 shops for about 3 months now. They had to replace several parts in the braking system. Than the rear brakes completely froze up and towed to Mazda out of Greensboro NC.

While driving the vehicle went to stop car and was unable to stop brake pedal was hard as a rock luckily I didn't hit anything or anyone. upon further research it seems that this model has an issues with the brake booster failing causing exactly what I experienced. As it turns out I did not qualify for the extended warranty on the brake booster due to a agreement between you and mazda my issue is it should be life of the model with no expiration date due to the fact it can happen at any moment. Luckily my family wasn't harmed and luckily someone else's family wasn't harmed because of this failure. My vehicle only has 86,000+ miles.

Mileage: 86,524

Driving on I-5, near Gold Hill, Oregon, when the traction control system light came on and the Vehicle slowed down. I had to push the gas pedal to the floor to get the car to move and I could not shift gears! It shuddered and the wheels seemed to lock up. I could smell burning rubber. I forced the car to the next exit, pulled off and shut it down. I sat there waiting for it to cool off. When I started it again it was a little rough at first but then seemed to get better and I was able to get home. I bought the car in June of 2020 from Lithia Motors in Medford, Oregon. I also bought a Power Train Warranty For $2,500 which was set to expire on 6/10/2021. I called Lithia and made an appointment to take it to them for repairs on June 1, 2021. I got as far as Grants Pass, OR, and it did the same thing I described above. I called a tow truck and had it towed to Lithia in Medford. When I got to Medford, the Service Manager told me I would have to take it to Crater Lake Ford. When I got to Crater Lake Ford I was told to take it to Crater Lake Mazda which I did. I described in detail what the car was doing to.the Service.Manager and told him I feared it was some kind of transmission problem. I also told him I had a power Train. Warranty the would expire on June10thso time was no the essence! I never suspected the brakes because we had the bakes repaired in November of 2020 at Lithia Motors. They were making a hissing sound. They replaced the.brake booster among other brake parts for $1,300 plus. That job was still under warranty. I got a call on June 15th telling me the problem was in the gear shift. He said it was now repaired and I could come and pick it up. I paid $674 for that repair. I got three miles from the dealership and the original problem occurred. I had it towed back to Mazda and it has been there ever since!! They replaced they're (traction control module), but that didn't fix it. After test driving it the original problem occurred! It's still at Mazda.

I HAVE BEEN EXPERIENCING ISSUES WITH MY BRAKES. VERY HARD TO PUSH, NOT COMING TO A STOP, SOUNDS LIKE AIR & MAKES A HISSING SOUND WHEN BRAKE ARE APPLIED.THE 1ST TIME I NOTICED I WAS DRIVING STRAIGHT ON A 2 LANE ST. A CAR WAS COMING FROM THE OFF RAMP ON THE RIGHT OF ME & CUT ME OFF. I TRIED TO BRAKE BUT, THEY WERE SO HARD TO PUSH DOWN, I HAD TO JUMP INTO THE NEXT LANE IN ORDER TO NOT REAR END HER BUT, BECAUSE I HONKED MY HORN, THE LADY JUMPED INTO HER NEXT LANE CAUSING ME TO HAVE TO CUT BACK OVER AGAIN, ALL THE WHILE MY BRAKES ARE REALLY HARD TO PUSH, THE CAR WOULDN'T STOP. THEY MADE HISSING SOUNDS. I HAD MY MECHANIC CHECK, STATES IT'S THE BRAKE BOOSTER & THERE MAY BE A RECALL. I CHECKED ONLINE, JUST A WARRANTY. MAZDA WILL REPAIR BEFORE 90K OR 7 YEARS. I CALLED MAZDA, WHO SAID THEY ONLY MAKE RECALLS WITH SAFETY ISSUES. I'D SAY THE BRAKES MALFUNCTIONING IS DEFINITELY A SAFETY ISSUE. THE 7 YR EXPIRATION WAS UP IN 2018. WHEN I BOUGHT THE VEHICLE IT ALREADY HAD 105K, SO THE WARRANTY WAS EXPIRED. THAT MAKES NO SENSE. IT SHOULD HAVE BEEN A RECALL. WHAT HAPPENS TO PEOPLE LIKE ME WHO BUY THE MAZDA CX-9 AFTER THE 7 YR OR 90K MILE EXPIRATION? IT DOESN'T APPLY TO US AND WE HAVE TO PAY OUT OF POCKET? KNOWING THAT THIS WAS A SAFETY ISSUE AND THAT IT WAS HAPPENING TO 2010-2011 CX-9 MODELS, IT SHOULD HAVE BEEN DEEMED A RECALL. ESPECIALLY WHEN PEOPLE BUY USED CARS. THIS IS NOT JUST AN ISOLATED ISSUE OR INCIDENT. THIS WAS LITERALLY LISTED BY PEOPLE WITH THE SAME COMPLAINTS. I HAVE NOT BEEN ABLE TO FIX MY VEHICLE. IT'S MY SOURCE OF TRANSPORTATION TO GET TO WORK. I DEFINITELY BELIEVE THIS SHOULD HAVE BEEN A SAFETY RECALL BECAUSE PEOPLE ARE STILL HAVING ISSUES. WHAT IF SOMEONE DIES. WHO'LL BE AT FAULT IF A PERSONS BRAKES GO & THEY GET INTO AN ACCIDENT & GET INJURED OR DIE? THERE HAVE BEEN SO MANY COMPLAINTS REGARDING THIS ISSUE, HOW COULD IT BE DEEMED A WARRANTY AND NOT A SAFETY RECALL?

Mileage: 166,900

I EXPERIENCED A SEVERAL BRAKING PROBLEMS IN MY CAR IN THE FALL OF 2020. I TOOK IT TO THE MAZDA DEALERSHIP AND THEY REPLACED THE BRAKING SYSTEM PER MAZDA'S SSP 93 BULLETIN. HOWEVER, MAZDA INFORMED ME THAT MY CAR WAS OUTSIDE OF THE EXTENDED WARRANTY FOR THIS ISSUE AND I HAD TO PAY FOR THE REPAIR MYSELF. I ARGUED THAT IT WAS CLEARLY A SAFETY ISSUE BECAUSE THE BRAKING SYSTEM PERFORMED SO POORLY THAT I NEARLY GOT IN MULTIPLE ACCIDENTS. MAZDA STATED THAT IT WAS NOT A SAFETY ISSUE, THEREFORE NO RECALL WAS NECESSARY, AND I WOULDN'T BE COVERED FOR THE REPAIR. I BELIEVE THE NHTSA NEEDS TO MAKE THIS A FULL SAFETY RECALL. THE BRAKING FAILURE IS VERY DANGEROUS TO DRIVERS AND MAZDA NEEDS TO TAKE FULL RESPONSIBILITY FOR THIS ISSUE.

Mileage: 68,000

HISSING SOUND WHEN BREAK PEDAL IS APPLIED. POWER BREAK BOOSTER FAILURE. THIS IS WHEN THE VEHICLE IS STATIONARY OR MOVING ON ANY STREET.

Mileage: 135,000

THE VEHICLE SUDDENLY LOST BRAKING POWER, AND THE BRAKE PEDAL WOULD SOMETIMES FEEL "SPONGY" AND SOMETIMES FEEL ROCK-HARD, WITH VARYING RESULTS FOR BRAKING POWER. I WENT TO A MECHANIC WHO SAID THE BRAKE BOOSTER FAILED, AND WE FOUND THIS WAS A KNOWN PROBLEM WITH THE MAZDA CX-9, HOWEVER NHTSA'S INVESTIGATION WAS RESOLVED WHEN MAZDA COVERED THIS PROBLEM FOR ONE YEAR FROM THE DATE IS CLOSING THE NHTSA INVESTIGATION. THIS APPARENTLY IS STILL A PROBLEM, THOUGH. I CALLED MAZDA'S CUSTOMER SERVICE, AND THEY REFUSED TO ACKNOWLEDGE THIS PROBLEM EXISTED AND WOULD ONLY GIVE THE SCRIPTED "THERE ARE NO OPEN RECALLS ON YOUR VEHICLE".

Mileage: 152,600

BRAKE BOOSTER SPONGY...KNOWN MAZDA ISSUE,NHTSA CLOSED ISSUE WHEN MAZDA AGREED TO EXTEND WARRANTY,WITHOUT RECALL. OUR PROBLEM OCCURRED AFTER WARRANTY ENDED...PROVING BRAKE RECALL NEEDS TO HAPPEN!!!! ON JULY 1ST,2020, MY WIFE'S TRIP BACK HOME NEARLY TURNED TRAGIC WHEN THE CAR WOULDN'T BRAKE(FELT SPONGY) DOWN THE HIGHWAY RAMP . FORTUNATELY FOR HER ,THERE WERE NO CARS AT THE INTERSECTION AS THE CAR ZOOMED RIGHT AT 60 MPH .EVENTUALLY,SHE WAS ABLE TO MANEUVER IT TO THE RIGHT LANE AND DROVE IT HOME WITH HAZARD LIGHTS ON. RIGHTFULLY DISTRAUGHT ABOUT THE WHOLE ORDEAL ,WE HAD TO THANK OUR STARS FOR HAVING HER HOME ALIVE AND WITHOUT CAUSING INJURY/DEATH TO OTHERS. ON MY DRIVE TO THE MECHANICS I HEARD AIR HISSING AND FELT THE BRAKE REALLY HARD TO PUSH. AGAIN HAZARD LIGHTS/ MANUAL DRIVE GOT US THERE. THE MECHANICS IMMEDIATELY SUGGESTED THAT THIS IS A KNOWN PROBLEM WITH MAZDA CX-9 AND THAT MAZDA WAS AWARE OF IT. HE SAID THAT MAZDA HAD PROVIDED EXTENDED WARRANTY FOR CUSTOMERS WHO HAD THE ISSUE UNTIL MARCH 2015. WE WERE GROSSLY UNAWARE OF ANY OF THIS,AS WE NEVER HAD THE PROBLEM UNTIL THIS JULY. NOT SURE HOW WE WENT ON FOR SO LONG WITHOUT ANY PROBLEM( MAY BE PROPER CARE/USE?),BUT ANY ISSUE WITH A BRAKE SHOULD HAVE BEEN ADDRESSED BY A COMPLETE RECALL ,NOT BY JUST PROVIDING EXTENDED WARRANTY FOR A LIMITED TIME ,JUST FOR PEOPLE CURRENTLY EXPERIENCING THE ISSUE.MAZDA CUSTOMER SERVICE DOWNPLAYED THE COMPLAINT AS OWNER'S EXPENSE AS WE DID NOT HAVE THE WARRANTY. OUR SITUATION PROVES THAT BRAKE ISSUES ARE NOT SOLVED BY EXTENDING WARRANTY,AND THE ONLY WAY TO ADDRESS THIS IS BY ISSUING A RECALL AND CORRECTING THE PROBLEM. IN ADDITION, THERE MIGHT BE MANY MORE MAZDA OWNERS STILL DRIVING THEIR VEHICLES,COMPLETELY UNAWARE OF THIS PROBLEM,THUS CONSTITUTING HAZARDOUS DRIVING CONDITIONS. THE NEXT TIME WE MIGHT NOT BE AS LUCKY TO ESCAPE WITHOUT INJURY/DEATH.

Mileage: 66,945

ABOUT 1 MONTH AGO I NOTICED MY CAR MAKING A HISSING SOUND WHEN MY FOOT WAS ON THE BRAKE PEDAL AT A RED LIGHT OR STOP SIGN. IF I WAS A LONG RED LIGHT OR IN A DRIVE THRU FOR MORE THAN 5 MINUTES I NOTICED MY CAR WOULD BEGIN TO TREMBLE. THEN ABOUT A WEEK AGO I NOTICED IF I HAD TO BRAKE SUDDENLY, THE BRAKE PEDAL WAS VERY HARD TO PUSH DOWN MAKING IT ALMOST IMPOSSIBLE TO STOP. I TOOK THE CAR TO THE DEALER ON 2/3/2020 AND THE TECHNICIAN MENTIONED THAT THEY HAVE BEEN HAVING PROBLEMS WITH THE BRAKE BOOSTER.

THERE ARE NOISES COMING FROM THE FRONT TIRES, WHEN DRIVING. NO ONE COULD PINPOINT THE PROBLEM. BRAKE BOOSTER WENT OUT A COUPLE MONTHS LATER.

Mileage: 125,000

VEHICLE PULSATES WHILE BRAKING WHILE DRIVING FAST OR AT SLOWER SPEEDS. THE STEERING WHEEL DOES NOT SHAKE. THE BRAKE PEDAL DOES NOT PULSATE. THE VEHICLE BRAKES WERE CHANGED SEVERAL TIMES WITH NEW ROTORS AND PADS ON ALL FOUR TIRES. I NOTICED THERE WAS A RECALL ON LOWER CONTROL ARMS #15V-451. IT ONLY WAS INSPECTED AT THE TIME OF RECALL BUT NEVER CHANGED. COULD IT BE POSSIBLE THAT THEY ARE NOW WORN AND CAN BE CHANGED PER THE RECALL.*DT

THE BRAKE PEDAL BECAME VERY HARD TO PUSH. I ASSUME IT COULD BE THE BRAKE POWER BOOSTER OR BRAKE MASTER CYLINDER.

Mileage: 114,000

THE BRAKES ARE HARD TO PUSH, APPEARS SPONGY AND MAKES A HISSING NOISE WHEN PRESSURE APPLIED.

Mileage: 100,000

TL* THE CONTACT OWNS A 2010 MAZDA CX-9. WHILE DRIVING AT ANY SPEED, THE BRAKES LOST POWER AND THE BRAKE PEDAL WAS DIFFICULT TO DEPRESS WITHOUT WARNING. THE CONTACT CALLED MAZDA OF CLEAR LAKE AT 281-823-5000 (LOCATED AT 20101 GULF FREEWAY, WEBSTER, TX 77598) AND WAS INFORMED THAT THE WARRANTY WAS EXPIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS APPROXIMATELY 100,000.

Mileage: 100,000

WHEN I APPLY MY BRAKES IT SOUNDS LIKE THEY ARE RELEASING AIR, AND THEY SEEM TO BE HARDER TO APPLY THEM. IT ALSO MAKES THIS SOUND WHILE I AM STATIONARY APPLYING THE BRAKES. I HAVE 156K MILES ON THE CAR, IS THIS NORMAL?

Mileage: 156,000

BRAKE PAD BECOME VERY HARD TO PUSH. I CAN'T STOP THE CAR AS USUAL.

HAVING BRAKING ISSUES WHILE DRIVING ON THE HIGHWAY AS WELL AS CITY STREETS THE BRAKE PEDAL IS GETS HARD TO DEPRESS AND BRAKING DIMINISHES ALMOST COMPLETELY. ACCORDING TO RESEARCH MAZDA HAS ALREADY IDENTIFIED THE PROBLEM EXISTS WITH THE POWER BRAKE BOOSTER. THERE IS A DEFECT IN THE RUBBER OF THE DIAPHRAM. INSTEAD OF ISSUING A FULL RECALL MAZDA EXTENDED THE WARRANTY PERIOD. MY CAR OF COURSE WAS JUST OUTSIDE THE WARRANTY PERIOD SO MAZDA WOULD NOT DO ANYTHING ABOUT IT. THIS SEEMS LIKE A SERIOUS SAFETY COMPONENT THAT CAN CAUSE AN ACCIDENT AND KILL SOMEONE. WE HAD MANY CLOSE CALLS BECAUSE OF THIS DEFECT IN THEIR PRODUCT THAT CAUSED OUR BRAKING TO BE ALMOST NON EXISTENT. THE BRAKE BOOSTER WAS REPLACED ON OUR OWN DIME AND THE PROBLEM WAS FIXED.

Mileage: 99,000

WHILE DRIVING IN HOUSTON HIGHWAY RUSH HOUR TRAFFIC ATTEMPTED TO APPLY BRAKES DUE TO TRAFFIC STOPPED AHEAD. BRAKE PEDAL WAS VERY DIFFICULT TO PRESS AND MADE A HISSING NOISE. AFTER ABOUT 20-30 YARDS WAS FINALLY ABLE TO BRING CAR TO A STOP NARROWLY AVOIDING AN ACCIDENT. WHEN TOOK VEHICLE TO MAZDA DEALERSHIP WAS TOLD IT IS THE POWER BRAKE BOOSTER THAT NEEDS TO BE REPLACED. SERVICE TECH STATED THIS WAS A KNOWN ISSUE WITH THE 2010 CX-9'S. MAZDA ISSUED AN EXTENDED WARRANTY BUT CUSTOMERS WERE NEVER NOTIFIED SO THEY COULD GET THE DEFECTIVE PART REPAIRED. MY VEHICLE ONLY HAS 83600 MILES, SO IT IS AVERAGE MILEAGE FOR AN 8 YEAR OLD CAR.

Mileage: 83,600

STARTED GETTING A HISSING SOUND FROM THE BRAKE BOOSTER AND A HARD TO DEPRESS BRAKE PEDAL.

Mileage: 76,000

HISSING SOUND NEAR BRAKE PEDAL FOLLOWED BY EXTREMELY HARD PEDAL AND MUCH EFFORT TO STOP.

Mileage: 140,000

TL* THE CONTACT OWNS A 2010 MAZDA CX-9. WHILE THE BRAKE PEDAL WAS DEPRESSED, THE VEHICLE CAME TO A SLOW STOP. THE CONTACT HEARD A HISSING NOISE COMING FROM THE BRAKE BOOSTER. THERE WERE NO WARNING INDICATORS ILLUMINATED. THE VEHICLE WAS TAKEN TO ED MORSE BAYVIEW CADILLAC (1240 N FEDERAL HWY, FORT LAUDERDALE, FL 33304 (888) 463-2950) WHERE IT WAS DIAGNOSED THAT THE BRAKE BOOSTER NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE AND DID NOT OFFER ANY ASSISTANCE. THE APPROXIMATE FAILURE MILEAGE WAS 100,000.

Mileage: 100,000

MAZDA CX-9 WHEN APPLYING THE BREAKS, PEDAL AT ONE POINT DURING BREAKING PROCESS BECOMES SPONGY, AS PEDAL RESISTANCE APPEARS TO RELEASE. WHEN FOOT PRESSURE IS REMOVED FROM BREAK PEDAL AND REAPPLIED, BREAK PEDAL PRESSURE IS VERY HARD TO PRESS AND BREAKING EFFICIENCY IS DIMINISHED CONSIDERABLY AS THOUGH BREAK BOOSTER HAS FAILED. BREAKING ISSUE APPEARS TO OCCUR PRIMARILY WHEN COMING TO A STOP AT REDUCED SPEEDS. NOTICED ISSUE WITH RECENT CA HEAT WAVE, VEHICLE APPEARS UNSAFE TO OPERATE. WITH WIFE PARTICIPATING AS A DRIVER IN CARPOOL, SHE JUST RECENTLY EXPERIENCED THE CONDITION AND IS CONCERNED THAT IT CAN RESULT IN AN ACCIDENT IF NOT ADDRESSED. CERTAINLY APPEARS TO BE THE SAME ISSUE INDICATED HERE: HTTP://WWW.CARCOMPLAINTS.COM/NEWS/2014/GOVERNMENT-CLOSES-MAZDA-CX-9-BRAKE-PEDAL-INVESTIGATION.SHTML

Mileage: 97,049

MY BRAKE PEDAL SUDDENTLY BECAME VERY HARD TO PUSH, LETS OFF A HISSING SOUND WHEN PUSHED AND TAKES A LONG TIME TO STOP. I WAS ON A CITY STREET COMING TO A STOP LIGHT AND WASN'T SURE MY CAR WAS GOING TO COME TO A STOP. I AM NOW LEARNING THROUGH RESEARCH THAT THIS WAS A PROBLEM MAZDA KNEW ABOUT BUT DIDN'T NOTIFY EVERYONE OF THE EXTENDED WARRANTY THEY OFFERED TO MAKE THE NECESSARY REPAIR. NOW, MY CAR DOESN'T QUALIFY FOR THE REPAIR AS IT ISN'T IN THE LIMITED EXTENDED WARRANTY MILEAGE THAT MAZDA OFFERED FOR THIS REPAIR. I JUST STARTED HAVING PROBLEMS WITH THIS ISSUE ON SUNDAY, AUGUST 20, 2017. SINCE I NEVER RECEIVED ANY NOTICE OF THIS BRAKE BOOSTER PROBLEM, HOW COULD I POSSIBLY HAVE KNOWN ABOUT THE EXTENDED WARRANTY AND HAD IT SERVICED DURING THAT TIME AND MILEAGE FRAME?

Mileage: 134,400

MY BRAKE PEDAL BECOMES VERY HARD TO PUSH, LETS OFF A HISSING OR WHISTLING SOUND WHEN PUSHED AND TAKES A LONG TIME TO STOP. WHEN I CALLED THE DEALER THEY ADVISED IT WAS A KNOWN BREAK BOOSTER ISSUE. THE ISSUE HAPPENS MAYBE 1/4-1/2 OF THE TIME I AM TRYING TO BREAK. THE DEALER HAD ME BRING THE CAR IN- BUT THEN TOLD ME MY CAR DIDN'T QUALIFY FOR THE REPAIR AS IT WASN'T IN THE LIMITED EXTENDED WARRANTY MILEAGE THAT MAZDA OFFERED FOR THIS REPAIR. MY COMPLAINT IS - IF THIS IS A KNOWN SAFETY ISSUE WITH THE BREAKS NOT WORKING PROPERLY- WHY IS THIS NOT A RECALL AND JUST A LIMITED WARRANTY- HOW CAN THEY GET AWAY WITH THAT? ALSO, HOW CAN THEY THEN NOT NOTIFY ALL THE OWNERS OF THE POTENTIALLY AFFECTED VEHICLES OF THE LIMITED WARRANTY SO THAT WE CAN BRING THE CAR IN AT THAT TIME FOR REPAIRS- INSTEAD OF ONLY WAITING UNTIL A CUSTOMER HAS A COMPLAINT ON THE ISSUE.

MY BRAKES HAVE A HISSING NOISE AND AND ARE HARD TO BRAKE WHEN I PUSH THE BRAKE PEDAL. THE SERVICE DEPT TELLS ME THAT THE BRAKE BOOSTER IS BAD AND NEEDS REPLACEMENT. ($800)THESE ARE SUPPOSED TO LAST THE LIFE OF THE CAR. I HAVE JUST OVER 100, 000 MILES ON IT. I HAVE A 2010 MAZDA CX-9. I WAS NEVER NOTIFIED THAT MAZDA HAD THIS WIDESPREAD PROBLEM, THAT THE GOVERNMENT WAS INVESTIGATING IT, OR THAT MAZDA WAS OFFERING A "SPECIAL SERVICE PROGRAM" THAT WOULD HAVE COVERED THIS REPAIR WHILE IT WAS UNDER 90,000 MILES. IT WAS IN MOTION WHEN I I NOTICED THIS PROBLEM LAST THURSDAY WHILE DRIVING ON CITY STREETS. IT IS NOW IN SHOP.

Mileage: 101,000

TOOK MY CAR TO DEALER 2-3 TIMES FOR THE BRAKES, WAY BEFORE MY WARRANTY WAS ANY WHERE NEAR EXPIRING, BECAUSE I KEPT HEARING A GRINDING SOUND. THEY KEPT TELLING ME NOTHING WAS WRONG, THAT MY BRAKES HAD SOME GRAVEL ON THEM AND THEY JUST CLEANED THEM. I DON'T TRAVEL ON DIRT ROADS OR ANYTHING, CITY ROADS/HIGHWAYS. NO OUT OF TOWN TRAVEL AT ALL, ACTUAL ONLY IN TOWN TRAVEL, HOME/WORK. MY 2ND CONCERN IS, WHILE DRIVING SOMETIMES MY SPEED SEEMS TO SHIFT, AS IF THE GEARS ARE SHIFTING. 3RD CONCERN IS, I RECEIVED A RECALL NOTICE, DON'T RECALL WHAT IT WAS ABOUT BUT I TOOK IT TO THE DEALERSHIP AND I WAS TOLD THEY DONE THAT WORK LAST TIME I CAME IN BUT I DON'T BELIEVE IT WAS DONE, SINCE THEY HAVEN'T BEEN HONEST WITH ME BEFORE. THEY DIDN'T EVEN LOOK AT THE LETTER. IF I RECALL CORRECTLY BRAKE COMPLAINTS/ SERVICE STARTED 2011 OR 2012 TO 2014....

Mileage: 30,000

SUDDENLY HAD TROUBLE BRAKING, DIFFICULT TO PUSH THE BRAKE DOWN AND STARTED TO MAKE A HISSING SOUND. IT WAS AN UNEASY EXPERIENCE AND LUCKILY MY KIDS WEREN'T IN THE CAR.

Mileage: 150,000

THE BRAKES ON OUR 2010 CX-9 ARE HISSING UPON BRAKE ENGAGEMENT AND HAVE A HARD FEEL TO THEM FOR THE FIRST HALF OR SO. THE BRAKES ARE SLOW TO ENGAGE DURING THIS TIME. AFTER THE HALF WAY MARK THE BRAKES ENGAGE QUICKLY AND FORCEFULLY. IT IS CONSISTENT WITH THE OTHER COMPLAINTS FOR THE BRAKE BOOSTER FAILURE. I AM HAVING IT LOOKED AT THIS WEEK AT A MAZDA DEALERSHIP. *TR

Mileage: 85,000

POOR BRAKING WHICH MAZDA RECOGNIZED AS A BRAKE BOOSTER AND MASTER CYLINDER PROBLEM BUT NEVER NOTIFIED ITS CX-9 CUSTOMERS TO GO TO THE DEALERSHIP TO HAVE THE REPAIR DONE.

Mileage: 146,000

2010-11 CX-9 BRAKE BOOSTER FAILURE. RAPID ONSET FROM FIRST SYMPTOMS TO COMPLETE FAILURE BRAKING OCCURRED WITHIN 45 MINUTES OF DRIVING ON HEAVY INTERSTATE CONGESTED TRAFFIC DURING RUSH HOUR. BREAKING FAILURE IS MOST SIGNIFICANT IF BREAKING IS FIRST APPLIED LIGHTLY AS A CAUTIONARY MEASURE. APPLYING LIGHT BREAKS RESULTS IN BREAKING SYSTEM PRESSURE TO RAPIDLY DROP DISABLING ASSISTED BREAKING WITHIN A FEW SECONDS. BREAKING A HEAVY VEHICLE WITH FAIL POWER ASSIST ALMOST ALWAYS RESULTED IN EITHER INSUFFICIENT BRAKING, OR WHEEL LOCKUP. (NOTE, ABS FAILS). THE ASSIST BRAKING THEN RETURNS IF BRAKE IS RELEASE FOR MORE THAN 10 SECONDS PROVIDING THE BRAKE IS NOT APPLIED. THIS IS A SIGNIFICANT SAFETY HAZARD THAT MAY EASILY RESULT IN THE DESTRUCTION OF PROPERTY AND DEATH. THE DEFECT SEEMS TO HAVE BEEN GLOSSED OVER BY THE NHTSA IN APRIL 2014 WHEN THE NHTSA INVESTIGATION INTO THIS FAILURE WAS CLOSED. IT APPEARS THAT THE INVESTIGATION WAS CLOSED WHEN MAZDA ELECTED TO USE STANDARD US MAIL TO INFORM AFFECTED MAZDA OWNERS THAT IT WAS 'EXTENDING ITS SERVICE WARRANTY' BY GIVING CUSTOMERS 1 YEAR FROM NOTICE TO HAVE THE DEFECTIVE PART REPLACED. IF THE MAZDA OWNER DID NOT RECEIVE OR ACT UPON THE 'EXTENDED WARRANTY' WITHIN THE FOLLOWING 12 MONTHS AND THE BRAKE BOOSTER FAILED, THE CUSTOMER WOULD BE RESPONSIBLE FOR OVER $1000 IN REPAIR COSTS, SERIOUS PROPERTY DESTRUCTION OR EVEN DEATH. IT IS SHAMEFUL THAT THE NHTSA CLOSED IT'S INVESTIGATION SO QUICKLY ON ACCOUNT OF SUCH REMEDIAL ACTION BY MAZDA CORPORATION.

Mileage: 105,000

BRAKE BOOSTER FAILED, DEALERSHIP INDICATED IT WAS UNDER EXTENDED WARRANTY. BROUGHT IN FOR REPAIRS AT NO COST, MAZDA FAILED TO ACKNOWLEDGE AND DO REPAIR. COST ME 556.21 FOR A VERY SERIOUS SAFETY ISSUE THAT IS UNDER INVESTIGATION. WOULD LIKE TO GET REIMBURSED. LOSS OF BRAKES, UNSAFE TO DRIVE. HISSING SOUND FROM BRAKES WHEN PRESSED

Mileage: 122,000

BRAKING POWER BOOSTER SYSTEM FAILED WHILE DRIVING. MY BOOSTER BRAKE AND MASTER CYLINDER WENT OUT SUDDENLY AND THERE WERE NO WARNING LIGHTS. WHEN APPLYING FULL PRESSURE ON THE BRAKE, A LOUD HISSING SOUND COULD BE HEARD ON THE HIGHWAY. IN ORDER TO MAKE A COMPLETE STOP, I HAD TO PRESS THE BRAKES FAR IN ADVANCE OF MY STOPPING POINT TO ENSURE THE VEHICLE COMPLETELY STOPPED IN ORDER TO AVOID HITTING THE VEHICLE IN FRONT OF ME. AFTER THIS HAPPENED, I IMMEDIATELY DROVE THE VEHICLE TO MY CLOSEST TRUSTED MECHANIC (TIRES PLUS) TO HAVE THE BOOSTER BRAKING SYSTEM INSPECTED, AND INEVITABLY REPLACED. TIRES PLUS COMPLETED THE REPAIRS AND TOLD ME ABOUT ANOTHER UNRELATED RECALL ISSUE AND RECOMMENDED I TAKE THE VEHICLE TO MY CLOSEST MAZDA DEALERSHIP (CLASSIC MAZDA ORLANDO) TO HAVE THE RECALL DONE FOR FREE. WHEN I MADE THE APPOINTMENT FOR THE UNRELATED RECALL ITEM, CLASSIC MAZDA INFORMED ME THAT THE BRAKING BOOSTER SYSTEM THAT I JUST HAD REPLACED BY TIRES PLUS WAS ACTUALLY A WARRANTY ISSUE THAT MAZDA CORPORATE WOULD HAVE REPAIRED AT NOT COST. CLASSIC MAZDA SUGGESTED I FILE FOR REIMBURSEMENT WITH MAZDA CORPORATE. UPON FILING FOR REIMBURSEMENT WITH MAZDA, I WAITED ABOUT 4 WEEKS AND THEN FOLLOWED UP WITH MAZDA TO CONFIRM THE DATE I SHOULD EXPECT DELIVERY OF THE CHECK. AT THAT TIME, THEY INFORMED ME THAT I WAS NOT ENTITLED TO FULL REIMBURSEMENT BECAUSE I SHOULD HAVE TAKEN OR HAD THE VEHICLE TOWED TO MY CLOSEST MAZDA DEALERSHIP FOR REPAIRS. NOT HAVING ANY KNOWLEDGE OF THE BRAKING SYSTEM WARRANTY AND FEARING FOR MY SAFETY, I PROCEEDED TO HAVE THE REPAIRS DONE IMMEDIATELY. ALL I WANT IS FOR MAZDA TO FULLY REIMBURSE ME FOR THE REPAIRS AND NOT JUST FOR "REASONABLE REPAIR COSTS." THIS COULD HAVE TURNED OUT MUCH WORSE HAD I GOTTEN INTO AN ACCIDENT, SO SHORTING ME $177 IS A BATTLE THAT I SHOULD NOT HAVE TO FIGHT WITH MAZDA CORPORATE.

Mileage: 69,000

THE BRAKES HAVE BECOME "HARD" AND HAVE TO BE PRESSED ALL THE WAY DOWN TO WORK. THE CAR IS SLOW TO STOP UNLESS YOU JAM ON THE BRAKES. IT FEELS UNSAFE TO DRIVE AS IT APPEARS A REAR-END COLLISION COULD EASILY HAPPEN. WE HAVE BEEN TOLD THAT THE PROBLEM IS THE BRAKE BOOSTER UNIT AND THERE IS AN EXTENDED WARRANTY TO 7 YRS, 90K. HOWEVER, THIS CAR HAS 91K.

Mileage: 91,000

VEHICLES BRAKES SUDDENLY STOPPED WORKING CAUSING A LOW SPEED COLLISION. I HAD THE BRAKES INSPECTED, AND WAS TOLD THIS WAS A KNOWN ISSUE WITH MY CAR, BUT MAZDA DID NOT INITIATE A RECALL. I THEN DISCOVERED THAT THE NHTSA HAD STRUCK A DEAL WITH MAZDA, AGREEING TO AN EXTENDED WARRANTY WITH NO CUSTOMER NOTIFICATION. THIS IS A CLEAR CASE OF A GOVERNMENT AGENCY THAT IS SUPPOSED TO PROTECT CONSUMERS, SHIRKING THEIR DUTY. NHTSA AND MAZDA YOU SHOULD BE ASHAMED OF YOURSELVES!

Mileage: 100,015

BRAKES MAKE A HISS SOUND WHEN PRESSED. SOUNDS LIKE AIR LEAKING OUT. VERY HARD TO BRAKE. SOUNDS LIKE BRAKE BOOSTER AS I READ ABOUT THIS ISSUE EVERYWHERE.

MY BRAKE BOOSTER HAS FAILED AND CAUSED A NEAR CRASH. THE HISSING SOUND WHEN PRESSING THE BREAK OCCURS AND THE BRAKES DO NOT COME TO A COMPLETE STOP. I HAD THE VEHICLE INSPECTED AND THE SAME BRAKE BOOSTER FAILURE THAT HAS BEEN REPORTED HAS BEEN PREVIOUSLY REPORTED. I WAS NEVER NOTIFIED FROM MAZDA OF THE WARRANTY EXTENSION AND NOW THAT MY MILEAGE IS AT 101,000 MILES I'VE JUST MISSED THE "WARRANTY EXTENSION" AND THEY REFUSE TO MAKE THE REPAIR. WHY IS THIS JUST AN INVESTIGATION AND NOT A COMPLETE RECALL? MAZDA CLEARLY KNOWS THERE'S A PROBLEM AND THIS CAN CAUSE SERIOUS ACCIDENTS WITH INJURY. MY WIFE, WHO IS THE PRIMARY DRIVER, IS PREGNANT AND HAVE 3 SMALL CHILDREN THAT USE THIS VEHICLE. *TR

Mileage: 90,000

FOR SEVERAL WEEKS NOW I HAVE BEEN HEARING A HISSING NOISE COMING FROM MY BRAKE PEDAL WHEN ENGAGING THE BRAKES. NOW, FOR THE PAST SEVERAL DAYS I HAVE NOTICED THAT THE BRAKE DEAL BECOME VERY HARD TO PRESS DOWN WHEN TRYING TO STOP. TODAY I WAS VERY SCARED BECAUSE I DIDN'T THINK THE CAR WOULD STOP.

Mileage: 85,000

VEHICLE BRAKES LIGHTING DIM WHILE COMING TO A STOP AND CAN NOT BE SEEN FROM OTHER VEHICLES APPROACHING FROM BEHIND ON THE ROAD. WHEN NOT REPLACED, STOP LIGHT WILL RUN CONTINUALLY OR NOT FUNCTION, POTENTIALLY CAUSING PREMATURE BULB FAILURE, SAFETY ISSUES AND/OR THE TRANSMISSION WILL NOT SHIFT OUT OF PARK. A FAILED STOPLIGHT SWITCH WILL PREVENT THE BRAKE LIGHT FROM ILLUMINATING WHEN THE BRAKE PEDAL IS APPLIED THAT MAY CAUSE A COLLISION AND A LIFE LOST. *TR

Mileage: 60,000

SAME BRAKING PROBLEM FOR WHICH MAZDA ISSUED AN EXTENDED WARRANTY IN APRIL OF 2014, WHERE MAZDA KNOWS THEY HAVE A DEFECTIVE PART IMPACTING THE QUALITY OF BRAKING, IN WHICH UNDER PRESSURE WOULD GENERATE A HISSING NOISE AND LOSS OF BRAKING POWER, EXTREME DIFFICULTY PUSHING THE BRAKE PEDAL (AND COMPLETE LOSS OF BRAKING ABILITY). OUR INCIDENT OCCURRED WHILE TRAVELING ON INTERSTATE 10 AT SPEEDS EXCEEDING 60 MPH AND TRAFFIC SLOWING. AS I ATTEMPTED TO BRAKE TO DECREASE SPEED WITH SLOWING TRAFFIC I REALIZED THE CAR WAS NOT SLOWING AND I HAD NO OPTION BUT TO QUICKLY SWERVE TO THE SHOULDER TO AVOID MAKING CONTACT WITH THE SLOWING CARS IN THE LANE. THE PROBLEM CONTINUED AND I IMMEDIATELY CONTACTED MY MAZDA DEALERSHIP WHO RECOMMENDED I IMMEDIATELY BRING THE CAR FOR SERVICE. MAZDA OBVIOUSLY KNOWS THERE IS AN SERIOUS ISSUE AS WELL AS THE NHTSA (WHY AREN'T THEY FORCING MAZDA TO ANNOUNCE AN IMMEDIATE RECALL VS. ALLOWING AN EXTENDED WARRANTY?). I COULD EASILY SEE HOW THIS ISSUE COULD LEAD TO A CRITICAL ACCIDENT OR FATALITY. COME ON NHTSA WAKE UP... HOW ABOUT WE SUE YOU AS NOT TAKING OWNERSHIP AND PROTECTING PUBLIC SAFETY FOR KNOWN ISSUES? WHY PLACE ALL THE BURDEN ON THE MANUFACTURER? WHAT EVEN FRUSTRATES ME FURTHER... WHEN THE CAR WAS BROUGHT IN TO BE SERVICED, THEY DON'T EVEN HAVE THE PARTS AVAILABLE. *TR

Mileage: 70,000

MY BRAKES BASICALLY FAILED! WHEN I WAS DRIVING, I TRIED TO APPLY MY BRAKES AND I COULD TELL RIGHT AWAY SOMETHING WAS WRONG. THE CAR HAD A LOT OF TROUBLE STOPPING AND I WAS AFRAID IT WOULDN'T STOP. THE BRAKES FELT VERY HARD AND I HAD TO APPLY A LOT OF PRESSURE TO THEM TO GET THE CAR TO STOP. I HAD TO ALMOST STAND ON THE BRAKES TO GET THEM TO WORK. WHEN I CALLED MY MECHANIC HE SAID IT SOUNDED LIKE THE BRAKE BOOSTER FAILED WHICH APPARENTLY IS VERY COMMON IN THIS MAKE AND MODEL OF CAR. I ALMOST HIT A CAR WHEN THIS HAPPENED AND IT WAS VERY DANGEROUS AND QUITE SCARY! IT WAS ALSO VERY EXPENSIVE TO FIX, BUT WOULD HAVE BEEN A LOT WORSE IF I HAD HIT SOMETHING. *TR

Mileage: 59,575

I WAS DRIVING AROUND TOWN AND ATTEMPTED TO BRAKE. I NOTICED THAT THERE WAS A ODD PRESSURE THAT WAS NOT ALLOWING ME TO BRAKE PROPERLY. I HAD TO PUSH HARD IN ORDER TO FEEL MY CAR SLOWING DOWN. AFTER I PUSHED PAST THE PRESSURE, THE BRAKE PEDAL WAS ABLE TO PUSH DOWN NORMALLY TO A FULL STOP. IT HAS DONE THIS EVERY TIME I HAVE USED THE BRAKE SINCE. IT IS NOW GETTING MUCH WORSE AND BECOMING INCREASINGLY HARDER TO PUSH THE BRAKE DOWN TO GET THE CAR TO STOP. AS I WAS PARKING IN MY GARAGE I WAS ALMOST UNABLE TO STOP IN TIME SO THAT I DIDN'T HIT THE BACK WALL OF THE GARAGE. THE BRAKE PEDAL WHEN PRESSED COMPLETELY TO THE FLOOR MAKES A SQUEALING NOISE. I HAVE PARKED THE CAR IN THE GARAGE AND DO NOT PLAN ON DRIVING IT UNTIL I CAN GET IT LOOKED AT. AS I SAID, IT IS GETTING WORSE EVERY TIME I DRIVE IT AND I BELIEVE MY SAFETY IS COMPROMISED WHEN DRIVING THIS VEHICLE IN THIS CONDITION. *TR

Mileage: 42,100

TL* THE CONTACT OWNS A 2010 MAZDA CX-9. THE CONTACT STATED THAT THE BRAKES FAILED INTERMITTENTLY. THE CONTACT MENTIONED THAT HE HAD TO APPLY FORCE IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER. THE MANUFACTURER WAS NOTIFIED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 41,000. UPDATED 8/28/14*CN THE CONSUMER STATED THE DEALER REPAIRED THE VEHICLE. UPDATED 09/15/2014 *JS

Mileage: 41,000

BRAKE PEDAL WOULD NOT DEPRESS. CAR HIT ANOTHER VEHICLE THAT WAS STOPPED AND IT HIT ANOTHER VEHICLE. THE MAZDA NEVER EVEN SLOWED BEFORE HITTING THE STOPPED VEHICLE. MY WIFE WAS DRIVING AND SHE HAS HAD THIS ISSUE BEFORE BUT IT WAS INTERMITTENT AND WE COULD NOT GET IT TO ACT UP TO BRING IT TO THE DEALER. THE 3RD CAR INVOLVED I DO NOT HAVE A STATUS OF. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6). *TR

Mileage: 56,977

VEHICLE DID NOT STOP (JUST LIKE SLIDE) WHEN APPLYING THE BRAKE. NEEDED TO APPLY THE BRAKE PEDAL SEVERAL TIMES TO STOP THE VEHICLE. *TR

Mileage: 50,425

TL* THE CONTACT OWNS ON A 2010 MAZDA CX-9. THE CONTACT STATED THAT WHILE DRIVING AT 10 MPH, THE BRAKE PEDAL BECAME STUCK TO THE FLOORBOARD AND MADE AN ABNORMAL NOISE WHILE THE CONTACT WAS ATTEMPTING TO STOP. THE CONTACT WAS ABLE TO RELEASE THE BRAKE PEDAL AND STOP THE VEHICLE BY DEPRESSING THE BRAKE PEDAL SEVERAL TIMES. THE VEHICLE WAS NOT DIAGNOSED OR REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 94,057.

Mileage: 94,057

I FILED A COMPLAINT THROUGH MAZDA IN 2012 AND IT DIDN'T GO ANYWHERE. I SAW AN ARTICLE IN USA TODAY, REGARDING MY VEHICLE STATING THAT AN INVESTIGATION WAS STARTED DUE TO 7 REPORTED INCIDENTS ON BRAKE FAILURES WHICH RESEMBLED MY EXPERIENCE. I AM NOW SHARING MY STORY AS IT COULD HAVE RESULTED IN SERIOUS INJURY. I WAS APPROACHING AN INTERSECTION AND APPLIED THE BRAKE BUT THE CAR DID NOT SLOW DOWN, I PUSHED THE BRAKE ALL THE WAY TO THE FLOOR AND THE WHEELS SQUEALED BUT THE CAR DID NOT SLOW. I LET UP ON THE BRAKE AND REAPPLIED AND THAT IS WHEN THE CAR BEGAN TO SLOW DOWN. BUT, IT WAS TOO LATE. I HIT THE CAR IN FRONT OF ME AND LAUNCHED IT INTO THE MIDDLE OF THE INTERSECTION. THANKFULLY, THE LIGHT HAD JUST CHANGED AND THE CROSS TRAFFIC WAS AT A STOP. WHEN THE POLICE ARRIVED, THEY NOTICED ONE SKID MARK ON THE DRIVER SIDE ONLY WHICH WAS AROUND 200 YARDS. ABOUT 4 FEET PRIOR TO IMPACT, THERE WERE TWO SKID MARKS, ONE ON EACH SIDE OF THE VEHICLE. THEY SAID THAT THEY HAD NEVER SEEN ANYTHING LIKE IT AND THAT I SHOULD TAKE IT TO AN INDEPENDANT PERSON TO GET THE BRAKES CHECKED OUT. I HAVE PHOTOS OF THIS AND SENT ALL OF THE DOCUMENTATION SENT TO THE INSURANCE COMPANY AND TO MAZDA. I FELT NEITHER BELIEVED ME AND WAS VERY DIAPPOINTED IN MAZDA'S RESPONSE. EVENTIALLY, I GAVE UP. WE ACTUALLY WERE GOING TO SELL THE VEHICLE AS I DIDN'T FEEL COMFORTABLE DRIVING IT. HOWEVER, AFTER ALL OF THE RESPONSES I WAS GETTING ABOUT WHAT I DESCRIBED AS IMPOSSIBLE WITH ANTI LOCK BREAKS OR THAT IT WAS A RESULT OF "PANIC BREAKING", I SECOND GUESSED MYSELF AND WE STILL HAVE THE VEHICLE. ON A SEPARATE OCCASSION 2-4 WEEKS PRIOR TO THE ACCIDENT ON MAY 15, MY HUSBAND WAS DRIVING VERY SLOWLY IN A RESIDENTIAL AREA AND WHEN HE APPLIED THE BRAKE, THE CAR INITIALLY DID NOT STOP UNTIL REAPPLYING. HE ROLLED PART WAY INTO THE INTERSECTION. I WAS WITH HIM WHEN THIS OCCURRED. *TR

Mileage: 19,000

THE VEHICLE STALLS WHEN IDLING AT A STOP LIGHT OR IN A DRIVE THRU. THE VEHICLES MOTOR BEGINS TO SHAKE AND THEN EVENTUALLY DIES AND STALLS OUT AND THE VEHICLE MUST BE STARTED AGAIN WITH THE TURN OF THE IGNITION. THE BRAKING SYSTEM IS ALSO DEFECTIVE. WHEN AT A STOP LIGHT AND YOUR FOOT IS ON THE BRAKE PEDAL. THE PEDAL SUDDENLY SINKS AS IF THE BRAKE FLUID IN THE MASTER CYLINDER HAS DRAINED FULLY AND THE BRAKE PEDAL SINKS ALL THE WAY TO THE FLOOR AND THE VEHICLE SHOOTS FORWARD EVEN IF YOUR FOOT IS ON THE BRAKE. ANOTHER PROBLEM IS IN THE POWER DOOR LOCK SYSTEM. THERE HAS BEEN A TIME WHEN THE POWER DOOR LOCK WAS STUCK AND THE REAR RIGHT DOOR COULD NOT BE SHUT. I HAD TO DRIVE THE CAR TO THE DEALERSHIP WITH THE CAR DOOR FLOPPING ALL OVER THE PLACE. THEY WERE ABLE TO FIX IT AT THE DEALERSHIP BUT COULD NOT FIGURE OUT HOW IT OCCURRED. THEY WERE AS PUZZLED AS I WAS. THE CAR WAS BOUGHT BACK IN 2010 BRAND NEW FROM THE MAZDA DEALERSHIP. THE REVIEWS WERE GOOD FOR THE VEHICLE. ITS THE FIRST MAZDA WE PURCHASED AND IS PROBABLY GOING TO BE THE LAST. *TR

Mileage: 44,521

I WAS DRIVING AROUND A SHARP BEND IN THE ROAD. I PUSHED DOWN ON THE BRAKE PEDDLE TO SLOW DOWN AND THE CAR KEPT ACCELERATING AT THE SAME SPEED. THE CAR NEVER SLOWED DOWN AND I HAD TO TAKE THE CORNER AT A UNSAFE SPEED. I DROVE TO THE NEXT STREET AND TESTED THE BRAKES AND THEY WORKED FINE? VERY SCARY INCIDENT. *TR

TL* THE CONTACT OWNS ON A 2010 MAZDA CX9. THE CONTACT STATED THAT THE BRAKE PEDAL BECAME STUCK TO THE FLOORBOARD AND MADE A STRANGE NOISE WHILE ATTEMPTING TO STOP. THE CONTACT WAS ABLE TO RELEASE THE BRAKE PEDAL AND BROUGHT THE VEHICLE TO A STOP BY DEPRESSING THE BRAKE PEDAL SEVERAL TIMES. THE CONTACT WAS ABLE TO DRIVE THE VEHICLE TO AN INDEPENDENT MECHANIC FOR FURTHER INSPECTION. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE AND CURRENT MILEAGE WAS 51,000.

Mileage: 51,000

I NOTICED A HISSING SOUND WHEN PRESSING THE BRAKE PEDAL TODAY 3/20/2014 AND LOSS OF BRAKE PRESSURE. I NOTIFIED THE DEALER AND THEY PROMPTLY TOLD ME TO BRING IT IN RIGHT AWAY TO BE LOOKED AT. I DID HOWEVER A GOOGLE SEARCH FOR MAZDA CX9 BRAKE ISSUE AND NOTICE THERE ARE 7 OTHER INCIDENTS WITH CX-9 BRAKE ISSUE EXPLAINING THE SAME SYMPTOMS. "THE NHTSA COMPLAINTS SAY THAT THE PROBLEM CAUSES A HARD PEDAL, INCREASED BRAKING EFFORT AND REDUCED BRAKING EFFECTIVENESS. SOME COMPLAINTS ALLEGE THAT THEY HEAR A HISSING NOISE DURING BRAKING SIMILAR TO THE SOUND OF AIR LEAVING THE TIRES. NO INJURIES OR CRASHES HAVE BEEN REPORTED." I SHOWED THE DEALERSHIP THE GOOGLE SEARCH FROM THE INTERNET...PERTAINING TO 2010 CX-9 BRAKE ISSUES. MAZDA DEALER SOUNDS LIKE THEY ARE AWARE OF THE PROBLEM...AND SHOULD BE TAKING PROACTIVE CORRECTIVE MEASURES TO FIX THIS PROBLEM. *TR

Mileage: 31,000

SEVERAL WEEKS AGO THE BRAKES STARTED MAKING A HISSING NOISE WHEN I WOULD DEPRESS THE BRAKE. THEN, THE CAR WOULD BRAKE AS USUAL UNTIL I NEEDED TO COME TO A COMPLETE STOP, WHEREAS THEN I WOULD NEED TO DEPRESS THE BRAKE VERY HARD TO MAKE THE CAR STOP, WHICH THEN IT WOULD STOP VERY SUDDENLY. THE MOST RECENT EVENT OCCURRED WHEN MY HUSBAND WAS DRIVING DOWN THE ROAD ABOUT 45 MPH AND HAD HIT THE BRAKES AND THE ENGINE COMPLETELY SHUT OFF, ALL THE WARNING LIGHTS CAME ON AND IT WAS VERY DIFFICULT FOR MY HUSBAND TO PULL THE CAR OVER AND COME TO A STOP. THE ENGINE DID START BACK UP AND WE DROVE ALL THE WAY HOME AND HAVE NOT SINCE DRIVEN THE VEHICLE. *TR

Mileage: 25,500

VEHICLE MAKES A HISSING SOUND (HEARD INSIDE THE VEHICLE) WHEN DEPRESSING THE BRAKE PEDAL. SOUNDS LIKE AN AIR LEAK. OCCASIONALLY THE PEDAL WILL GO HARD AS IF POWER ASSISTED BRAKING FEATURE IS LOST. VERY DANGEROUS SITUATION! VEHICLE TAKEN TO DEALER TODAY (02/24/14) AND WAS TOLD REPLACEMENT BRAKE BOOSTER IS REQUIRED. *TR

Mileage: 50,100

DRIVING IN SNOWY CONDITIONS; BRAKES FAILED TWICE WHEN I APPLIED LIGHT PRESSURE. FIRST TIME, THE BRAKES SHUDDERED, BUT THE CAR FINALLY STOPPED AFTER I APPLIED HARD PRESSURE; THE SECOND TIME IT HAPPENED, THE BRAKES SHUDDERED, AND NOTHING HAPPENED WHEN I FIRST APPLIED HARDER PRESSURE. EVENTUALLY THE CAR SKIDDED, BUT IT WAS TOO LATE. *TR

Mileage: 38,000

DRIVING, HAD MY 2 YEAR OLD SON AND 7 YEAR OLD DAUGHTER IN THE CAR, A CAR SLOWED IN FRONT OF ME AND WHEN I PUSHED THE BRAKES THEY FELT HARD AS A ROCK AND THE CAR WOULD NOT STOP. SLOWED DOWN AT A VERY SLOW PACE WHILE PUSHING ON THE BRAKES AS HARD AS I COULD. I PRACTICALLY HAD TO STAND UP. I WAS HORRIFIED. MY BRAKES CONTINUE TO DO THIS. SOMETIMES THEY FEEL VERY HARD AND SOMETIMES THEY PUSH DOWN BUT SOUND AS IF AIR IS LEAKING OUT. I AM TAKING THE CAR IN TOMORROW TO SEE WHAT IS GOING ON. OBVIOUSLY SOMETHING IS WRONG, BUT THERE ARE NO WARNING LIGHTS ON OR ANYTHING. I LOOKED FOR RECALLS ON THE BRAKES AND HAVE FOUND NOTHING. I HAVE FOUND OTHERS HAVE HAD THE SAME ISSUE AND HOPE THAT THERE IS A RECALL BEFORE SOMEONE GETS HURT OR EVEN KILLED. THIS WAS A VERY SCARY EXPERIENCE.....MY CHILDREN AND I WERE FORTUNATE I WAS ABLE TO GO INTO THE OTHER LANE WITHOUT CRASHING. *TR

Mileage: 75,000

WHILE DRIVING MY 2010 MAZDA CX-9 APPROXIMATELY 65MPH ON INTERSTATE 270S IN MARYLAND, I PRESSED THE GAS PEDAL TO ACCELERATE IN AN ATTEMPT TO PASS SEVERAL VEHICLES WHO WERE TRAVELING IN THE RIGHT HAND LANE. ONCE I FELT THAT I HAD ENOUGH ADDITIONAL SPEED TO SUCCESSFULLY PASS THE VEHICLES, I RELEASED THE GAS PEDAL AND NOTED THAT THE CAR CONTINUED TO ACCELERATE. I ATTEMPTED TO APPLY MY BRAKES, BUT THEY WOULD NOT SLOW THE VEHICLE. AFTER SEVERAL UNSUCCESSFUL ATTEMPTS TO APPLY MY BRAKES, I SEARCHED FOR A SAFE PLACE TO CONTINUE TRAVELING AS MY VEHICLE CONTINUED TO ACCELERATE, NOTING I WOULD NEED TO SHIFT INTO NEUTRAL AND MOVE INTO THE MEDIAN. LUCKILY, AFTER NUMEROUS REPEATED ATTEMPTS, MY BRAKES FINALLY ENGAGED AND SLOWED THE VEHICLE. I FEEL THIS IS A MANUFACTURER'S DEFECT THAT COULD ULTIMATELY LEAD TO A FATALITY. I AM TOO SCARED TO DRIVE THE VEHICLE AT THIS POINT IN TIME. *TR

Mileage: 25,068

BRAKES WOULD NOT WORK AS USUAL. AFTER "STOMPING" ON BRAKE, CAR CONTINUED TO MOVE FOR SEVERAL FEET. THERE WERE NO WARNING LIGHTS OF BRAKE FAILURE WHATSOEVER. TOOK VEHICLE TO DEALER TO BE INFORMED THE MASTER CYLINDER AND BRAKE POWER BOOSTER WERE OUT AND THE CAR WAS DANGEROUS TO DRIVE. VERY GLAD NOBODY GOT HURT. COUPLE ISSUES: THIS BRAKE FAILURE IS FAIRLY WIDESPREAD WITH THIS MAKE/MODEL/YEAR AS I'VE FOUND FROM RESEARCH. WHY IS THERE NO RECALL? THERE'S NOT EVEN A TECHNICAL ADVISORY FROM MAZDA ABOUT THIS SERIOUS THREAT TO DRIVERS OF THIS CAR. DOES SOMEBODY HAVE TO GET HURT FIRST? SECOND, I GET THAT PARTS GO BAD - BUT ON SOMETHING AS IMPORTANT AS THE BRAKE SYSTEM, THE CAR SHOULD SOUND SOME SORT OF ALARM, LIGHT A DUMMY LIGHT....SOMETHING TO TELL THE DRIVER TO STOP DRIVING THE CAR AS THEY ARE IN IMMINENT DANGER. TO NOT ADDRESS AT LEAST THIS SECOND ISSUES IS NEGLECTFUL OF MAZDA AND THE NTSB. TO NOT ADDRESS THE MECHANICAL FAILURES BY WAY OF RECALL IS ALSO EXTREMELY NEGLIGENT. *TR

Mileage: 52,000

THIS INDIVIDUAL BROUGHT THE CAR IN TO THE DEALER COMPLAINING OF HIGH PITCHED SQUEAKING SOUND FROM BRAKES. DEALERSHIP CHECKED BRAKES AND SAID NOTHING WRONG. PICKED UP CAR NEXT DAY AND FELT THAT CAR NOT RIDING WELL AND LET IT SIT IN DRIVEWAY FOR 2 DAYS. WENT TO DRIVE AGAIN AND PEDAL WAS "HARD" AS IF IT WAS ON THE FLOOR. THEN WHENEVER I PRESSED ON THE PEDAL, I HEARD A HISSING SOUND AS IF AIR WAS LETTING OUT OF TIRES. CAR RESPONSE FOR SLOWING TO A STOP MUCH LONGER. CALLED DEALER ASAP AND ARRANGED TO DROP CAR OFF THAT NIGHT. DEALER CALLED NEXT DAY TO SAY GOOD THING WE DROPPED CAR OFF NIGHT BEFORE AS THERE WAS LITTLE TO NO BRAKES LEFT DUE TO POWER BOOSTER FAILURE. HOW WAS IT THAT I COULD TELL BRAKES WERE GOING BUT DEALER COULD NOT? THIS IS A LEASED CAR. 10 WEEKS LEFT ON LEASE. PAST WARRANTY. $800 REPAIR. CLEARLY MAZDA IS HAVING AN ISSUE WITH THE 2010 CX-9 POWER BOOSTER DUE TO THE NUMBER OF COMPLAINTS LODGED ON THIS SITE. THE SERVICE DEPARTMENT FOR THE DEALER WORKED VERY HARD ON MY BEHALF AND WAS ABLE TO GET MAZDA TO COVER MOST OF THE REPAIR, THE DEALER PICKED UP ANOTHER $200 AND I HAD TO PAY $100. FAIR I GUESS BUT SINCE THIS IS A SERIOUS ISSUE MAZDA SHOULD RECALL THE CARS AND DO THE FIX FOR FREE. *TR

Mileage: 38,000

AS I WAS DRIVING DOWN AN ONRAMP TO A FREEWAY, I DEPRESSED THE BRAKE PEDAL AND THE CAR DID NOT RESPOND NORMALLY. I HAD TO PUSH FULL FORCE ON THE PEDAL TO GET THE CAR TO STOP JUST BEFORE REAR ENDING ANOTHER VEHICLE. THIS OCCURRED SEVERAL TIMES AFTER WITHOUT ANY WARNING LIGHT OR ANYTHING. I TOOK THE CAR TO THE DEALER AND FOUND OUT THAT THE BRAKE BOOSTER HAS STOPPED WORKING. THEY ARE GOING TO REPLACE THE BRAKE BOOSTER AND I HAVE TO PAY FOR IT. THIS CAR IS NO LONGER UNDER FACTORY WARRANTY BUT HAS BEEN WELL MAINTAINED BY A MAZDA DEALER ON A REGULAR SCHEDULE.

Mileage: 71,000

I PURCHASED A NEW MAZDA CX 9 IN THE FALL OF 2010. AFTER A FEW MONTHS, I NOTICED THE TRACTION CONTROL "TCS OFF" BUTTON ILLUMINATED WHILE DRIVING UP A PAVED INCLINE. AFTER TURNING OFF THE ENGINE AND RESTARTING, THE TCS-OFF BUTTON SHUT OFF. THIS HAPPENED A COUPLE OF TIMES BEFORE MY FIRST SERVICING. I MENTIONED THE ISSUE TO THE MAZDA DEALERSHIP WHEN I WENT IN FOR REGULAR SERVICING. THEY CHECKED IT AND SAID THEY FOUND NO PROBLEM WITH IT. YET THE PROBLEM CONTINUED SPORADICALLY. THE TCS-OFF LIGHT OCCASIONALLY ILLUMINATES ON INCLINED ROADS, IN RAIN OR SNOW, WHEN DRIVING FROM A PAVED TO AN UNPAVED ROAD (OR VICE VERSA). STILL THE DEALERSHIP FOUND NO PROBLEMS DURING SERVICING. NOW IN THE THIRD YEAR OF DRIVING, I MENTIONED THE TCS AGAIN TO THE DEALERSHIP, AND THIS TIME THEY SAID, OH YES, IT IS A PROBLEM.. MAZDA RELEASED A BULLETIN ABOUT IT, SAYING THE TCS NEEDS TO BE REPAIRED FOR $340, AND THE CAR SHOULDN'T BE DRIVEN UNTIL IT'S REPAIRED. YET THIS IS THE CONDITION I'VE ALWAYS DRIVEN IT IN! AND OF COURSE, NOW MY WARRANTY HAS EXPIRED, AND I'M LIABLE FOR REPAIRS EVEN THOUGH THIS PROBLEM EXISTED RIGHT FROM THE VERY BEGINNING. THE DEALERSHIP HAS SAID THEY'D PUT IN A CALL, AND PERHAPS MAZDA WILL COVER AT LEAST PART OF THE COST. IF IT HAD BEEN REPAIRED UNDER WARRANTY, I WOULDN'T BE LIABLE FOR THE REPAIR AND I WOULDN'T HAVE TO PAY FOR THE RENTAL CAR WHILE I'M WAITING. I'LL SEE HOW IT PANS OUT. VERY FRUSTRATING. *TR

Mileage: 1,600

I PURCHASED THIS CAR FROM A DEALER THIS YEAR WITH $48,000 MILES. IT WAS IN TIP TOP SHAPE. RECENTLY THE BRAKES ARE NOT WORKING. IT IS NOT THE BRAKE PADS, BUT A HISSING SOUND IN THE LINE AND NO BRAKES. THE COST TO FIX IS AROUND $1500 AND I DON'T HAVE A CREDIT CARD OR THE MONEY TO FIX AT THIS TIME. IN RESEARCHING I AM NOT ALONE WITH THIS PROBLEM. THERE ARE GOING TO BE SOME BAD WRECKS AND PROBLEMS IF THIS IS NOT ADDRESSED ASAP. I PRAY EVERYTIME I HAVE TO GO OUT AND STOP REALLY FAR BEHIND PUMPING AND TRYING TO MAKE THEM WORK. *TR

Mileage: 55,000

TL* THE CONTACT OWNS A 2010 MAZDA CX-9. THE CONTACT STATED THAT THE BRAKES WOULD SPORADICALLY FAIL. THE CONTACT HAD TO CONTINUOUSLY PUMP THE BRAKES IN ORDER TO STOP THE VEHICLE. THE VEHICLE WAS TAKEN TO THE DEALER WHERE IT WAS DETERMINED THAT THE MASTER CYLINDER AND BRAKE BOOSTER NEEDED TO BE REPLACED. THE FAILURE AND THE CURRENT MILEAGE WAS 42,000.

Mileage: 42,000

BRAKES FAILED DUE TO FAULTY BRAKE BOOSTER. TWO OTHERS AT THE DEALERSHIP HAD THE SAME PROBLEM. MAZDA COULD NOT IMMEDIATELY FIX THE PROBLEM BECAUSE THEY ARE OUT OF BRAKE BOOSTERS AND ARE NOT SURE WHEN ANY WILL BE AVAILABLE. INDICATIONS ARE THAT THIS IS A WIDE SPREAD ISSUE AND SHOULD BE INVESTIGATED. *TR

Mileage: 42,000

BRAKE SYSTEM FAILURE INVOLVING MASTER CYLINDER AND BOOSTER. LEAKING INTERNALLY. REPLACEMENT COST OF $1500 RESEARCHED CX9 AND FOUND THIS PROBLEM IS WIDESPREAD AND NOT BEING ADDRESSED.WE HAD A MINOR FENDER BENDER THAT COULD HAVE BEEN MUCH WORSE. MAZDA USA HAS NOT ISSUED ANY BULLETINS AS OF YET. *TR

Mileage: 52,000

CATASTROPHIC BRAKE FAILURE. BRAKES WOULD NOT STOP VEHICLE. VEHICLE TOWED FOR REPAIR. *TR

Mileage: 36,400

IN JUNE OF 2012 I NOTICED THAT MY BRAKES MADE A HISSING SOUND AT RANDOM TIMES. I BROUGHT THE CAR INTO THE DEALER FOR A COMPLETE SERVICE AND BRAKE CHECK. I WAS TOLD THAT THE BREAKS WERE IN PERFECT CONDITION BUT THEY DID DO A BRAKE FLUSH. THE HISSING CONTINUED AT RANDOM TIME UNTIL THE WEEK OF 1/13/13 AT WHICH TIME THE HISSING WAS AT EVERY OCCASION THE BRAKES WERE ENGAGED. AND ON 1/15/13 THE BRAKES FAILED TO STOP THE VEHICLE. I BROUGHT THE CAR DIRECTLY INTO THE DEALERSHIP AND WAS INFORMED THAT IT WAS A LEAK IN THE BRAKE BOOSTER INTO THE MASTER CYLINDER. AFTER RESEARCHING THIS I HAVE FOUND THAT THIS IS A COMMON MALFUNCTION WITH THE CX9 AND I AM EXTREMELY FRUSTRATED. ALTHOUGH MAZDA ACKNOWLEDGED THE ISSUE ON EARLIER MODELS THEY ARE NOT ACKNOWLEDGING THE ISSUE ON THE LATER MODELS. THEY SHOULD HAVE TO STAND BEHIND THE PARTS AND VEHICLES THAT THEY MAKE. AND WHEN THEY KNOW THAT A CERTAIN PART OR SYSTEM HAS A HISTORY OF FAILING THEY SHOULD TAKE RESPONSIBILITY FOR THE ISSUE INSTEAD OF MAKING THEIR CUSTOMERS PAY FOR THEIR MISTAKES AND FAULTY PARTS. *TR

Mileage: 52,000

I HAVE A 2010 MAZDA CX-9 WITH APPROXIMATELY 41,000 MILES. I HAVE BEEN DILIGENT IN MY MAINTENANCE-ALWAYS WITH A MAZDA DEALER. THE CAR STARTED TO EXHALE SLIGHTLY WHEN BRAKING. THE CAR THEN DID NOT WANT TO BRAKE/STOP WITHOUT PUMPING THE BRAKES REPEATEDLY. I WAS ABLE TO STOP SUDDENLY BUT UNABLE TO STOP WITHOUT AMPLE WARNING AT STOP SIGNS, ETC. THE VEHICLE WAS TAKEN TO MAZDA DEALERSHIP WHERE THEY TOLD ME THAT THE VACUUM BOOSTER AND MASTER CYLINDER WERE DEFECTIVE. I WAS NOT ALLOWED TO DRIVE THE CAR BECAUSE IT WAS NOT SAFE. THEY THEN TOLD ME THE NEXT MORNING THAT MAZDA/DEALERSHIP FOUND NO WARRANTY COVERING SUCH A MALFUNCTION/FACTORY DEFECT B/C I HAD PASSED THE 36,000 MILES MARK. I WILL HAVE TO PAY $839 FOR A REPAIR TO DRIVE MY CAR THAT IS AN ISSUE WITH THE MANUFACTURING OF MY CAR. THE DEALER TOLD ME I MUST CONTACT MAZDA USA DIRECTLY TO SEE IF THEY WILL PAY FOR IT-OTHERWISE I AM RESPONSIBLE. I HAVE READ OTHER COMPLAINTS AND AN ARTICLE IN THE WALL STREET JOURNAL BOTH SITTING THE EXISTENCE AND EXPERIENCE OF THIS MALFUNCTION. THE NHTSA WAS SAID TO BE INVESTIGATING THE ISSUE. MAZDA SHOULD BE FORCED TO RECALL THE VEHICLES AND FIX THE MALFUNCTIONING BRAKE SYSTEM. IT IS NOT THE FAULT OF THE CONSUMER BUT OF THE CAR MANUFACTURER. *TR

Mileage: 40,500

TL* THE CONTACT OWNS A 2010 MAZDA CX-9. THE CONTACT STATED THAT WHILE DRIVING 25 MPH, THERE WAS A DELAY IN STOPPING DISTANCE ONCE THE BRAKES WERE ENGAGED. THE CONTACT MENTIONED THAT HE HAD TO DEPRESS THE BRAKES REPEATEDLY IN ORDER TO BRING THE VEHICLE TO A COMPLETE STOP. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC WHO DIAGNOSED THAT THE VACUUM BOOSTER AND MASTER CYLINDER WERE DEFECTIVE AND NEEDED TO BE REPLACED. THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE VEHICLE WAS NOT REPAIRED. THE FAILURE MILEAGE WAS 50,000 AND THE CURRENT MILEAGE WAS 50,040.

Mileage: 50,000