Tap a category to read its complaints. One report may name several components.
When problems were reported
Mileage at the reported incident
20–25K
225–50K
250–75K
775–100K
11100–150K
0150K+
24 reports with mileage · 9 unknown
NHTSA’s mileage field refers to the reported incident, not necessarily the filing date. This shows report counts, not the likelihood of a failure.
What to inspect
Issues worth paying extra attention to based on owner reports.
Service Brakes. Review the 15 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Air Bags. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
Engine. Review the 6 owner reports in this category and discuss these concerns during a pre-purchase inspection. Read reports →
NHTSA owner reports · September 18, 2026 snapshot.
1 crash reports0 fire reports1 injury reports
What owners actually said
33 reports
108,000 miles · May 14, 2020
Engine
TL* THE CONTACT OWNS A 2010 MAZDA CX9. THE CONTACT STATED THAT WHILE THEIR SON WAS DRIVING APPROXIMATELY 30 MPH, THE VEHICLE STALLED WITHOUT ANY WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE WATER PUMP FAILED CAUSING COOLANT TO MIX WITH THE ENGINE OIL AND DAMAGED THE…
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TL* THE CONTACT OWNS A 2010 MAZDA CX9. THE CONTACT STATED THAT WHILE THEIR SON WAS DRIVING APPROXIMATELY 30 MPH, THE VEHICLE STALLED WITHOUT ANY WARNING. THE VEHICLE WAS TAKEN TO AN INDEPENDENT MECHANIC TO BE DIAGNOSED. THE CONTACT WAS INFORMED THAT THE WATER PUMP FAILED CAUSING COOLANT TO MIX WITH THE ENGINE OIL AND DAMAGED THE ENGINE. THE CONTACT THEN TOOK THE VEHICLE TO QUIRK MAZDA (99 MCGRATH HWY, QUINCY, MA 02169, (617) 773-8000) WHO CONFIRMED THE PREVIOUS DIAGNOSIS. THE CONTACT WAS INFORMED THAT THE ENGINE NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE AND STATED THAT THE REPAIR WAS NOT COVERED UNDER WARRANTY OR RECALL. THE APPROXIMATE FAILURE MILEAGE WAS 108,000. VIN NOT AVAILABLE
NHTSA ODI #11324549
100,000 miles · Jun 22, 2019
Service Brakes
BRAKE BOOSTER WENT OUT. ALMOST CAUSING AN ACCIDENT BECAUSE THE BRAKES WENT STIFF. I ABSOLUTELY CAN NOT BELIEVE THIS ISN'T A RECALL. I GUESS IT TAKES A SERIOUS INJURY OR LAWSUIT TO BECOME A LAWSUIT. I WAS TOLD BY MECHANIC TI HAVE TO HAVE REPAIRS AT DEALER. DEALER IS IMPOSSIBLE TO GET A HOLD OF FOR AN APPOINTMENT. I TOLD THEM NEE…
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BRAKE BOOSTER WENT OUT. ALMOST CAUSING AN ACCIDENT BECAUSE THE BRAKES WENT STIFF. I ABSOLUTELY CAN NOT BELIEVE THIS ISN'T A RECALL. I GUESS IT TAKES A SERIOUS INJURY OR LAWSUIT TO BECOME A LAWSUIT. I WAS TOLD BY MECHANIC TI HAVE TO HAVE REPAIRS AT DEALER. DEALER IS IMPOSSIBLE TO GET A HOLD OF FOR AN APPOINTMENT. I TOLD THEM NEEDS TO BE FIXED ASAP AND THEY BOOKED ME A WEEK OUT!! SO UPSET I DROVE AND SUDDENLY BRAKES STIFFNESS. COULD BARELY APPLY PRESSURE
NHTSA ODI #11221945
77,700 miles · Jun 12, 2019
Service Brakes
AS NOTED BY MANY ON THIS SITE, I EXPERIENCED A SCARY BRAKE BOOSTER FAILURE. COMPLETE LOSS OF POWERED BRAKES WHICH PUT MY WHOLE FAMILY IN DANGER. THIS IS A FAMILY CAR AND I HAVE SMALL CHILDREN SO THIS IS APPALLING THAT MAZDA WOULD NOT ISSUE A RECALL FOR THIS PROBLEM. I SEE THAT THERE WAS A TSB AND ASSOCIATED EXTENDED WARRANTY …
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AS NOTED BY MANY ON THIS SITE, I EXPERIENCED A SCARY BRAKE BOOSTER FAILURE. COMPLETE LOSS OF POWERED BRAKES WHICH PUT MY WHOLE FAMILY IN DANGER. THIS IS A FAMILY CAR AND I HAVE SMALL CHILDREN SO THIS IS APPALLING THAT MAZDA WOULD NOT ISSUE A RECALL FOR THIS PROBLEM. I SEE THAT THERE WAS A TSB AND ASSOCIATED EXTENDED WARRANTY PERIOD FOR THIS ISSUE BUT AS MANY HAVE NOTED ON THIS SITE, THE TRUE FAILURE TENDS TO OCCUR AFTER THE 7 YEAR WARRANTY PERIOD. I ACTUALLY STARTED NOTICING SOME ISSUES WITH THE BRAKING ON THIS VEHICLE YEARS AGO, BUT ASSUMED THAT IT JUST NEEDED NEW BRAKE PADS AND ROTORS AS THE CAR WAS GETTING OLDER. IF I HAD RECEIVED SOME TYPE OF COMMUNICATION FROM MAZDA OR NHTSA, THEN I WOULD HAVE KNOWN THE TRUE ISSUE DURING THE EXTENDED WARRANTY. I ONLY HAVE 77,000 MILES ON THIS CAR, BUT SINCE IT IS OLDER THAN 7 YEARS... MAZDA REFUSES TO ADDRESS THE PROBLEM OR TAKE ACCOUNTABILITY FOR THIS QUALITY DEFECT. I PAID FOR THE REPAIR MYSELF. MAZDA HAS LOST A LOYAL CUSTOMER. SHAME ON THEM FOR PUTTING DRIVERS AND THEIR FAMILIES KNOWINGLY AT RISK AND NOT DOING THE RIGHT THING.
NHTSA ODI #11219521
65,000 miles · May 24, 2019
Service Brakes
AFTER OWNING THE VEHICLE FROM THE DEALERSHIP THAT I BOUGHT IT FROM THE POWER BOOSTER BRAKING SYSTEM IS HAVING MALFUNCTIONS I OWN THE VEHICLE FOR 8 MONTHS LOOKING INTO RECALLS ON THIS VEHICLE IT SHOWS THAT THEY WERE DOING RECALLS ON THIS SYSTEM FOR THIS CAR APPROXIMATELY 4 YEARS AGO AND NOW I BOUGHT THE CAR AND THEY'RE SAYING THA…
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AFTER OWNING THE VEHICLE FROM THE DEALERSHIP THAT I BOUGHT IT FROM THE POWER BOOSTER BRAKING SYSTEM IS HAVING MALFUNCTIONS I OWN THE VEHICLE FOR 8 MONTHS LOOKING INTO RECALLS ON THIS VEHICLE IT SHOWS THAT THEY WERE DOING RECALLS ON THIS SYSTEM FOR THIS CAR APPROXIMATELY 4 YEARS AGO AND NOW I BOUGHT THE CAR AND THEY'RE SAYING THAT IS OUT OF THE EXTENDED WARRANTY. IF I WOULD HAVE KNOWN THIS BEFORE I PURCHASE THE CAR I WOULD HAVE NEVER BOUGHT IT IT SEEMS TO BRAKE BOOSTER SEEMS TO HAVE A CRACKED THAT SEEMS TO LEAK AIR WHICH CAUSES THE BRAKES TO MALFUNCTION AND CAN CAUSE AN ACCIDENT I FEEL THIS IS A VERY SERIOUS SITUATION AT HAND HERE AND THAT I NOT KNOWING WHAT WAS THE ISSUE SHOULD NOT BE RESPONSIBLE FOR A PROBLEM THAT THE BAD FACTION DOES NO DOES EXIST AND SHOULD BE REPLACED BY THE MANUFACTURER OR FEES AND SERVICE
NHTSA ODI #11209774
110,000 miles · Jan 18, 2019
Engine
ON JAN 12, 2019 WE WERE DRIVING HOME AND WITHOUT WARNING THE TEMPERATURE GAUGE SPIKED AND THE CHECK ENGINE LIGHT CAME ON. THE ENGINE STOPPED AND I WAS ABLE TO GET THE VEHICLE OFF THE ROAD. I LOOKED TO SEE THE COOLANT RESERVOIR WAS EMPTY. I WAS ABLE TO REFILL IT, THINKING POSSIBLY THERE WAS A LEAK. IT GOT US HOME SAFELY. THE…
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ON JAN 12, 2019 WE WERE DRIVING HOME AND WITHOUT WARNING THE TEMPERATURE GAUGE SPIKED AND THE CHECK ENGINE LIGHT CAME ON. THE ENGINE STOPPED AND I WAS ABLE TO GET THE VEHICLE OFF THE ROAD. I LOOKED TO SEE THE COOLANT RESERVOIR WAS EMPTY. I WAS ABLE TO REFILL IT, THINKING POSSIBLY THERE WAS A LEAK. IT GOT US HOME SAFELY. THE NEXT DAY, ENROUTE TO THE RADIATOR SHOP; THE SAME THING HAPPENED. AFTER A TOW HOME, THEN A TOW TO THE RADIATOR SHOP AND EVENTUALLY A TOW HOME, IT WAS DIAGNOSED AS A WATER PUMP FAILURE AND NOW A NEW ENGINE IS THE ANSWER FOR THE REPAIR. THERE WAS ABSOLUTLY NO WARNING TO THIS HAPPENING AND THE WATER PUMP IS INTERNAL. I UNDERSTAND THAT THE PUMP CAN/WILL WEAR OUT. I GET IT. WHERE IT'S LOCATED IS A JOKE AND I'VE READ IT'S AT LEAST A $1500 - $2000 FIX, JUST FOR THE PUMP REPLACEMENT. THE MAIN ISSUE IS THE NO WARNING WHATSOEVER!
NHTSA ODI #11170858
Mileage unknown · Dec 19, 2018
Air Bags
TL* TAKATA RECALL. THE CONTACT OWNS A 2010 MAZDA CX-9. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 18V717000 (AIR BAGS). THE MANUFACTURER STATED THAT THE PART WAS NOT AVAILABLE AND DID NOT KNOW WHEN IT WOULD ARRIVE. THE DEALER WAS NOT CONTACTED. THE CONTACT HAD NOT EXPERIENCED A FAILURE. PARTS DISTRIBUTION DISCON…
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TL* TAKATA RECALL. THE CONTACT OWNS A 2010 MAZDA CX-9. THE CONTACT RECEIVED NOTIFICATION OF NHTSA CAMPAIGN NUMBER: 18V717000 (AIR BAGS). THE MANUFACTURER STATED THAT THE PART WAS NOT AVAILABLE AND DID NOT KNOW WHEN IT WOULD ARRIVE. THE DEALER WAS NOT CONTACTED. THE CONTACT HAD NOT EXPERIENCED A FAILURE. PARTS DISTRIBUTION DISCONNECT. *TT CONSUMER STATED THERE WAS NO FAILURE. *JB
NHTSA ODI #11162453
89,700 miles · Sep 26, 2018
Service Brakes
BRAKE BOOSTER FAILED AT 90K MILES. PEDAL IS EXTREMELY HARD TO PUSH AND HAS LITTLE BRAKE FORCE. ALONG WITH A LOUD HISSING NOISE FROM BRAKES. MAZDA SAID IT WAS PART THEIR SPECIAL SERVICE WARRANTY AND WOULD CHARGE FULL RATE TO FIX.
NHTSA ODI #11131814
145,000 miles · Sep 26, 2018
Power Train
I WAS DRIVING MY 2010 MAZDA CX9 WHEN A LOUD BANG HAPPENED. I WAS ON A SIDE ROAD AND STOPPED IMMEDIATELY, I COULD NOT VISIBLY SEE ANY ISSUES. I BEGAN TO DRIVE SLOWLY AND WITH EVERY ROTATION THE NOISE CONTINUED. LUCKILY I WAS NEXT A A GARAGE AND THEY DETERMINED IT WITH THE POWER TRANSFER UNIT (CASE). THEY HAD TOLD ME THIS IS A V…
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I WAS DRIVING MY 2010 MAZDA CX9 WHEN A LOUD BANG HAPPENED. I WAS ON A SIDE ROAD AND STOPPED IMMEDIATELY, I COULD NOT VISIBLY SEE ANY ISSUES. I BEGAN TO DRIVE SLOWLY AND WITH EVERY ROTATION THE NOISE CONTINUED. LUCKILY I WAS NEXT A A GARAGE AND THEY DETERMINED IT WITH THE POWER TRANSFER UNIT (CASE). THEY HAD TOLD ME THIS IS A VERY COMMON ISSUE AND THAT MAZDA EVEN KNEW OF THIS ISSUE BUT NEVER HAD A RECALL PLACED. AFTER RESEARCHING AND SEEING MULTIPLE YEARS OF THIS ISSUE FOR THE CX 9 AND EVEN AN EXTENDED WARRANTY SOMETHING HAS TO GIVE MAZDA. BASICALLY THE FRONT TRANSFER CASE (OR POWER TRANSFER UNIT, PTU) IS TOO CLOSE TO THE EXHAUST SYSTEM AND GETS HEATED UP MORE THAN USUAL. THE GEAR LUBRICANT INSIDE GETS DETERIORATED A LOT FASTER AND BECOMES SLUDGE. IN THEORY GEAR LUBRICANT IN FRONT TRANSFER CASE、REAR DIFFERENTIAL、AND MANUAL TRANSMISSION CAN BE "LIFE-TIME" LUB UNDER A SUITABLE ENVIRONMENT, HENCE MAZDA AND FORD DON'T SPECIFY ANY RECOMMENDED MAINTENANCE INTERVAL FOR GEAR LUBRICANT REPLACEMENT AND DON'T EVEN BOTHER TO DESIGN A DRAIN HOLE FOR IT! BUT SINCE THE GEAR LUB ACTUALLY GETS HEAT UP SO OFTEN, IT CAUSES PROBLEMS AND MAKES THE FRONT TRANSFER CASE EVENTUALLY FAILED DUE TO SLUDGE ISSUE. I HAVE READ 100'S OF COMPLAINTS AND STILL NO RESOLUTION EXCEPT FOR THE PEOPLE THAT CLAIM THEY CALLED MAZDA DIRECTLY AND AFTER MONTHS OF COMPLAINTS WERE HANDLED INDIVIDUALLY. I HAVE BEEN A LIFETIME MAZDA OWNER FROM MY FIRST 1986 MAZDA 323 AND THIS HAS BEEN A NIGHTMARE. A RECALL HAS TO BE MADE WITH THIS NUMBER OF COMPLAINTS AND ISSUES. $3000 OUT OF POCKET FOR A KNOWN ISSUE WITH YOUR VEHICLE IS UNACCEPTABLE
NHTSA ODI #11131702
108,000 miles · Jul 22, 2018
Engine
CAR WAS ALWAYS SERVICED REGULARLY. ONE DAY I WAS ABOUT TO GET ON A BUSY HIGHWAY INTO BOSTON JUST BEFORE RUSH HOUR, WHEN MY CAR SUDDENLY MADE A LOUD KNOCKING NOISE IN THE ENGINE. I IMMEDIATELY PULLED OVER AND THEN THE CAR SHUT OFF. NO LIGHTS EVER CAME ON BEFOREHAND AND NO LEAKING OF FLUIDS EVER HAPPENED BEFORE INCIDENT. HAD I…
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CAR WAS ALWAYS SERVICED REGULARLY. ONE DAY I WAS ABOUT TO GET ON A BUSY HIGHWAY INTO BOSTON JUST BEFORE RUSH HOUR, WHEN MY CAR SUDDENLY MADE A LOUD KNOCKING NOISE IN THE ENGINE. I IMMEDIATELY PULLED OVER AND THEN THE CAR SHUT OFF. NO LIGHTS EVER CAME ON BEFOREHAND AND NO LEAKING OF FLUIDS EVER HAPPENED BEFORE INCIDENT. HAD IT TOWED TO MAZDA DEALER, WHO AT FIRST TOLD ME THEY WOULDN'T BE ABLE TO EVEN LOOK AT IT FOR 6 DAYS. FRIEND WORKED THERE AND GOT MECHANICS TO LOOK AT IT RIGHT AWAY. THEY SAID THE WATER PUMP WAS GONE AND IT WOULD COST $3500 TO FIX IT. THE WORST PART OF IT WAS, THAT ACCORDING TO THE DEALERSHIP, THEY KNOW THAT THERE IS A FLAW WITH WHERE THE WATER PUMP IS LOCATED IN THE ENGINE, AND THAT BECAUSE OF THIS THE ENGINE WAS MOST LIKELY GONE AS WELL. IN THEIR WORDS, THEY HAVE REPLACED MANY WATER PUMPS IN THESE SAME SITUATIONS OVER THE YEARS, AND ONLY ONE CAR DIDN'T NEED A NEW ENGINE. THEY RECOMMENDED FIXING THE WATER PUMP, THEN PUTTING IN A NEW ENGINE--$10,000 WORTH OF WORK. WE BOUGHT THIS CAR CERTIFIED PRE-OWNED FROM A DEALERSHIP. IT ONLY HAD 108,000 MILES ON IT AND THE EXTENDED WARRANTY HAD JUST ENDED 8 MONTHS BEFORE. I HAVE NUMEROUS OTHER CARS IN MY LIFETIME AND NEVER HAVE I HAD TO REPLACE AN ENTIRE ENGINE, JUST BECAUSE THE WATER PUMP WAS GONE! THIS CAR SHOULD HAVE BEEN WORTH ABOUT $9K-$11K FOR RESALE, AND INSTEAD MAZDA WANTED TO GIVE US $2K TOWARDS A DOWN PAYMENT FOR LEASING ANOTHER OF THEIR CARS. THEY GAVE US A RATE THAT THEY CLAIMED WAS A SPECIAL ONE, HOWEVER, I FOUND OUT I COULD GET AN EVEN BETTER ONE ONLINE MYSELF! WHEN WE CALLED THEM ON THIS AND SAID WE WERE TIRED OF DEALING WITH THIS, THEY TOLD US THEY WOULDN'T TALK WITH US ANYMORE. VERY DISAPPOINTING TO A FAMILY THAT CAREFULLY WATCHES ITS MONEY AND BUDGETS FOR EMERGENCIES, BUT WEREN'T PREPARED TO NEED AN ENTIRELY NEW CAR BEFORE THE OTHER WAS EVEN PAID FOR! SO UNFAIR!
NHTSA ODI #11112905
106,000 miles · Apr 1, 2018
Engine
THE ENGINE COMPLETELY LOST POWER. TIMING CHAIN FAILURE IN DOWNTOWN AREA / TRAFFIC, CAUSING FAILURE OF HEAD GASKET. WARNING AND IMMEDIATE FAILURE WHEN IN MOTION IN BUSY DOWNTOWN MIDDAY TRAFFIC.
NHTSA ODI #11082334
Official recalls
0
No recalls in this snapshot.
Model-level recall history does not show whether a particular VIN is affected or has received a repair. Check a VIN with NHTSA ↗
NHTSA investigations
0
No exact-year investigations in this snapshot.
2010 Mazda CX9 Problems, Complaints & Recalls | Skip That Year