Mazda CX-9 Complaints

58 consumer complaints on file.

#11755863August 10, 2026
VEHICLE SPEED CONTROL, POWER TRAIN, ENGINE
The vehicle was parked stationary in the driveway with the engine running for 3-5 minutes with the A/C on. The vehicle then accelerated forward into my garage causing damage. Once I entered the vehicle, both the dash and shifter displayed park. Current TCU system internal failures have been reported from the pulling of data from Mazda.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11752508July 23, 2026
ENGINE
1) What component or system failed or malfunctioned: On 6/12/2026 While drive on the highway with our daughter in the car and we experienced a high speed stall. The engine failed and we lost power. We barely got the car of the highway and coasted into a parking lot. 2) Life threating for Father, Mother and daughter and other drivers on the highway. 3) The Mazda dealer stated they were unable to reproduced problem. The diagnostic report showed few random misfired on two cylinders 2 & 3. Autozone detected codes P0300 with Secondary DTCs U0442-00 4) There car was only inspected by the dealer. The vehicle has not been inspected by Mazda the manufacturer. We requested Mazda to escalate this to the District Service Manger and to open hotline call with Mazda corporate but both of these were denied. All our service has been performed at Mazda dealer, including oil changes. We have always received a video of them working on our car with a detailed summary of what done. We did not receive the video or diagnostic report for this issue. 5) There were no warning lamps, no messages or other symptoms of the problem prior to the failure.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11749820July 12, 2026
ENGINE
This complaint refers to Mazda and it's dealer refusal to properly execute the warranty work under the SSPD5 Valve Stem Seal Class Action Campaign and does not follow the Court's approval of the final Settlement Agreement. I assert that Mazda and it's dealer are not following the SSPD5 repair procedures. 1. I have documentation and complaints going back to Dec-2023 with this particular dealer that I have experienced low level oil consumption within the 7,500 mile oil change interval. The dealer did not detect oil leaks in any of the engine systems. 2. I presented the vehicle to the dealer with the Engine Oil Level Warning Light illuminated. The Diagnostic Trouble Code (DTC) P250FF:00 should be stored in the vehicle memory. 3. The vehicle had 50,501 miles and was within the original 60 month limited powertrain warranty. 4. The dealer refused to conduct the valve stem seal repairs until an oil consumption test was run. The dealer claims that because I had another service center (note that I use full synthettic oil that meets Mazda oil specifications) conduct the most recent oil change at 43,738 miles (note within the 7,500 oil change interval and the 1 year time window) that the dealer would require an oil consumption test. I assert that this is not required per the class settlement agreement and the SSPD5 repair procedures that Mazda sends to all of its dealers. 5. I researched the available documentation that it's available through the NHTSA.gov. The language in these documents is very clear. 6. SSPD5 Valve Stem Class Action Campaign, Repair Procedure 6-12-2024: a. "The DTC250 is not required to be present for valve stem replacement." b. "Customer complaint of oil consumption...OR Low Oil Light OR DTC250 follow the flow chart." c. Flow chart says "Replace the exhaust valve stem seals by following TSB 01-003/24" if no previous warranty work done. 7. SSPD5 updates on 8-6-25 and 4-28-26: a. Refer to page 4, DTC250 is NOT required to be presented (it is noted in RED).
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11745150June 18, 2026
ENGINE
Check engine light comes on and error P0303 comes on. Had an independent mechanic do the following and after each one, error P0303 still came on 1. Swap the ignition coils from 2 to 3 2. Swap spark plugs from 2 to 3 3. Swapped injectors 4. Compression test 5. Leak down test 6. Changed the spark plug, coil and injectors 7. Looked for vacuum leaks. Mechanic believes that it is related to the cracked cylinder head in the recall, MC-10232269-0001.pdf. My vehicle is just outside of the recall range and has 87k miles on it. Other research online shows other people with the same vehicle and similar milealge are also having this problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11742663June 8, 2026
Chest Clip, Buckle, Harness
I am reporting a critical mechanical restraint failure regarding the 5-point harness crotch buckles on the Graco TrioGrow and the Graco TriRide car seats. The red button-release tension on both of these models is engineered with insufficient physical resistance. My toddler is capable of physically depressing the lower crotch buckle and completely freeing themselves while the vehicle is traveling at highway speeds. The harness was explicitly verified as tight via the pinch test and the chest clip was at armpit level, proving the failure is strictly the low force required to disengage the buckle.I contacted the manufacturer (Graco), and their customer support agents dismissed this hardware failure by suggesting 'behavior modification' instead of addressing the mechanical vulnerability. A child restraint system must physically restrain the occupant regardless of behavioral variance. This is an active, ongoing safety hazard for young children traveling in these specific models.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11742662June 8, 2026
Chest Clip, Buckle, Harness
I am reporting a critical mechanical restraint failure regarding the 5-point harness crotch buckles on the Graco TrioGrow and the Graco TriRide car seats. The red button-release tension on both of these models is engineered with insufficient physical resistance. My toddler is capable of physically depressing the lower crotch buckle and completely freeing themselves while the vehicle is traveling at highway speeds. The harness was explicitly verified as tight via the pinch test and the chest clip was at armpit level, proving the failure is strictly the low force required to disengage the buckle.I contacted the manufacturer (Graco), and their customer support agents dismissed this hardware failure by suggesting 'behavior modification' instead of addressing the mechanical vulnerability. A child restraint system must physically restrain the occupant regardless of behavioral variance. This is an active, ongoing safety hazard for young children traveling in these specific models
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11728503April 1, 2026
ELECTRICAL SYSTEM:SEAT HEATER:WIRING HARNESS
The contact owns a 2022 Mazda CX-9. The contact stated that the vehicle was being operated with the front driver's side seat warmer activated to the highest heat level. After driving for several hours, the vehicle was parked. While exiting the vehicle, the contact experienced pain in the rear thigh area of each leg. Upon inspect the contact discovered that the rear thigh area of both legs had sustained burning and blistering despite having pants on as a barrier during the failure. During the injuries, the contact was wearing pants. The contact was later treated at the local urgent care center for first-degree burns and blistering caused by excessive heat from the seat warmer. The manufacturer was notified of the injuries and advised to have the vehicle examined by the local dealer. The vehicle was taken to the local dealer, who was unable to detect a failure in the operation of the seat warmer, and no problem was found. The contact inquired about the temperature of the seat warmer and what its highest temperature level is; however, that information was not provided, and the manufacturer stated that it is the temperature at which the occupant felt comforable with. No further information was available. The failure mileage was 53,000.
Crash:
No
Fire:
No
Injuries:
1
Deaths:
0
#11717618February 12, 2026
STRUCTURE:BODY
I am reporting a safety concern involving multiple loose windshield header bolts and cowl panel fasteners on my 2022 Mazda CX-9. The issue was discovered on 1/28/26 at approximately 44,000 miles. Several bolts securing the windshield header and cowl panel area were found loose. These components support parts located at the base of the windshield. Loose fasteners in this area raise concern about potential windshield instability, movement of the cowl panel, and possible detachment or structural compromise over time. This condition could create a safety risk, particularly at highway speeds, including driver distraction from vibration or noise, potential windshield instability, and possible failure of components mounted near the base of the windshield. The Mazda dealer is aware of this issue. I was informed that they have repaired at least 15 similar vehicles, including those associated with a Roman Service member, indicating a possible pattern. Despite this, Mazda did not cover the repair cost. Given that multiple bolts were improperly secured and that the dealer has seen numerous similar cases, this appears to be a potential manufacturing or assembly defect affecting multiple vehicles. I am requesting that NHTSA review this issue for possible investigation and recall consideration.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11717365February 11, 2026
FORWARD COLLISION AVOIDANCE: WARNINGS, UNKNOWN OR OTHER
On February 9, 2026, our 2023 Mazda CX‑9 experienced a sudden and complete system malfunction while being driven. Multiple system failures began approximately six minutes before the crash. During this time, the driver reported: • Total loss of steering • Complete brake failure • No response to acceleration or driver input • No ability to slow, stop, or maneuver the vehicle • No meaningful warnings that allowed corrective action The vehicle became completely uncontrollable. At the crash site, there were no skid marks, no braking evidence, and no signs of evasive action, consistent with a full loss of vehicle control. The vehicle only stopped after entering approximately two feet of water and striking a tree. The vehicle was declared a total loss. This incident represents a severe safety defect involving critical electronic and mechanical systems. A modern vehicle should not lose all steering, braking, and control functions under any circumstances. We are requesting a full investigation into the cause of this failure and whether similar incidents have occurred in other Mazda vehicles. We can provide photos, crash documentation, diagnostic information, and driver statements upon request.
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11704278December 10, 2025
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
Backup camera shows three to four feet before red collision line is not accurate causing severe damage to my garage door.
Crash:
Yes
Fire:
No
Injuries:
0
Deaths:
0
#11699571November 15, 2025
SERVICE BRAKES
If you press both the brake and gas at the same time (even if accidental), the onboard computer apparently thinks that the driver is confused, and it sets the gas flow to “idle”. The first time this happened was on the freeway, and I was very lucky to be able to coast into a gas station (thinking that I simply running out of gas - even though the gas gauge showed plenty of gas remaining). And so, I took it to Christian Brothers automotive the next day, and they ran extensive (and expensive) diagnostics. They found (to their surprise!) that this is the way the latest CX-9 works! The computer sees that you are on the gas and brakes, and so it “thinks” that you must be confused. And so, it sets the gas to “idle”. I believe this is an extremely dangerous action for the computer to take, and this behavior needs to be removed from all CX-9's IMMEDIATELY! And please don't just say (as others have) that the driver "shouldn't press both the brake and accelerator at the same". One might use the brake and accelerator at the same time for good reason, such as an icy road. But the computer SHOULD NOT DECIDE ON ITS' OWN TO SET THE THROTTLE TO IDLE!
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11683485August 27, 2025
STRUCTURE:BODY
To Whom It May Concern, I am writing to formally report a potential safety issue with my 2022 Mazda CX-9, which is a Certified Pre-Owned (CPO) vehicle under limited warranty until March 2026 and powertrain warranty until March 2029. It has 36,000 miles on it. Recently, I noticed a crack forming near the front combination light on the front bumper. The vehicle has not been involved in any accident, collision, or external impact. Upon researching, I found TSB Bulletin No.: 09-022/20, titled FRONT BUMPER CRACKED NEAR THE FRONT FENDER/FRONT COMBINATION LIGHT, which addresses similar cracks in 2016–2019 CX-9 models (VINs lower than JM3TC******306028). Although my vehicle falls outside the bulletin’s specified range, the crack appears identical in location and nature—suggesting a possible design or material stress issue that may extend beyond the listed VINs. When I brought this to the dealership’s attention, they declined coverage under warranty, citing the TSB’s limited applicability. Mazda corporate echoed the same response. I find this deeply concerning. Why is this issue being dismissed based solely on VIN range, without a proper inspection or consideration of safety implications? The crack is adjacent to lighting components and could compromise structural integrity. This is not a cosmetic flaw—it’s a potential safety hazard. I respectfully request that NHTSA investigate this matter and help facilitate a resolution, including repair or replacement of the bumper. It is disappointing that safety concerns are being overlooked in favor of technical exclusions and cost considerations. I urge NHTSA to consider expanding the scope of investigation to include newer CX-9 models not currently covered by the TSB. Importantly, I’ve seen many other CX-9 owners reporting similar bumper cracks in vehicles outside the TSB VIN range, particularly in Facebook owner groups. This suggests the issue may be more widespread than currently acknowledged and deserves broader attention.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11679527August 9, 2025
TIRES
I recently purchased a 2023 Mazda CX9 with factory installed tires, Falken Ziex CT50 A/S p255/50R20 104V M+S. I was driving on the freeway on Tuesday [XXX] going around 65-70MPH. My tire pressure light came on all of a sudden, I started to slow down and make my way over to the right lane and then shoulder to check it out and all of a sudden the tire tread completely ripped away from the rest of the tire. Some of the sidewalls stayed intact, which ultimately protected my wheel from damage. But other than the tire pressure light coming on 30 seconds before the failure, there was no warning, no obvious defect or anything in the tire. Had it been one of my front tires it potentially could have been way worse of an outcome as I was driving on a bridge and next to a semi. The shop where I ended up replacing all 4 tires because I did not feel safe using this brand any longer said he has never seen the tread just rip right off of the sidewalls. I searched the tire make and model and there was an open recall on this specific brand and size tire, but my date stamp did not match. However, it was the same exact reason for the recall in the first place. So clearly this company has not changed their manufacturing methods and is putting people's lives in danger with these tires spontaneously detaching from the wheel. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11665696June 9, 2025
SERVICE BRAKES
I brought my vehicle in on 2/22/25 for a brake issue. I had to pump the brakes every time before I stopped to get the brake pedal to work. If I just hit the brakes the pedal would go almost to the floor. Greico Mazda has attempted 4 times to fix this issue with no success and has had my car in their shop for 4 months. I am now waiting for a Mazda rep to "fly in" to look at the car. They have replaced multiple parts on the car. I no longer feel safe driving this vehicle and have limited faith in Mazda to correct the problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11665046June 5, 2025
POWER TRAIN
My vehicle is part of Mazda's 2021-2022 Mazda Valve Stem Seal Settlement. The dealership had yet to call me in for the repair of said valve seal repair as I was on a list. The settlement is suppose to extend out the powertrain warranty on the vehicle 2 years/24,000 to 7 years/84,000. My vehicle has 60,083 miles on it. One of the cylinders on my vehicle lost compression. The dealership and Mazda both say they will not cover the cost for repair as they only are covering things in the powertrain relate to oil consumption. The cylinders are part of the powertrain and carbon buildup from excessive oil burning because of the defective seal causes valve damage or sticking which will cause compression loss. Mazda is actively denying what they agreed to in the settlement and costing people money for repairs that should be covered.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11661072May 14, 2025
STEERING, ELECTRICAL SYSTEM, UNKNOWN OR OTHER
Starting [XXX], through [XXX], we began receiving multiple "Critical Vehicle Malfunction" alerts (46 alert messages)via the Mazda app, including "Parking Brake Malfunction" and "Electric Parking Brake Malfunction." During this time, the vehicle experienced delayed starts and eventually required a jump-start. We brought it to the dealership multiple times to show the messages, before our 3-year/36,000-mile B2B warranty expired, but the issues were dismissed until the battery was finally replaced. At just over 36,000 miles (currently 39,646), a new issue emerged a “thud” sound from the steering wheel. The dealer diagnosed it as a failed u-joint shaft, which was deemed non-serviceable and not covered under warranty. I inquired about potential causes or prevention—no clear answer was known. I found relevant NHTSA TSBs (06-001/20 & 06-001/24) related to steering issues and escalated to Mazda USA. Mazda agreed to cover 50% as a goodwill gesture, leaving me to pay about $500. Two weeks later, the part arrived and was installed—but it did not fix the issue. The dealership now says it’s a failed bearing within the Electric Power Steering (EPS) unit, which requires complete replacement at a cost of over $2,000. Only one part is available in the U.S., with another two-week wait. The original (misdiagnosed) part was already sent back to Mazda. My out-of-pocket cost is now $1,151 and rising. Given the early warning alerts, misdiagnoses, and the fact that EPS controls several safety-critical functions (steering, cruise, lane assist, etc.), I believe this is a fundamental system failure that should be fully covered under warranty or as a safety-related goodwill repair. I respectfully request that Mazda assume full financial responsibility for the replacement and any related work. Thank you for your consideration. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11644015February 20, 2025
VISIBILITY/WIPER
The windshield wiper sprayers don't work properly when it gets significantly below freezing. This is incredibly dangerous on highways where it snows and the roads are salted, allowing for the snow to be thrown up as mud. This ends up in the windshield wipers just spreading mud all over the windshield and reducing visibility to near 0. Having this occur while driving at lower highway speeds makes this incredibly dangerous. Having to pull over on the highway when it's snowing isn't great, especially when some mountain highways have concrete walls with no shoulder. Using fluid that is rated for below freezing also causes this to freeze, suggesting that it may be related to wind chill while traveling at speed. It's also definitely not an issue with the overall system or the fluid because the rear windshield wipers still work. This is probably due to the way they designed this to move the emitters off the hood. A search for the term, "mazda cx-9 windshield wiper frozen", shows many such reports online. Some have complained to Mazda only to have this ignored by them. There were on indicators in the vehicle to show that that was a potential problem.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11633972January 3, 2025
SERVICE BRAKES
My wife has a cold. She picked it up during several uncomfortable hours in the emergency room. Our driveway is on a bit of a slope. She stopped the car, put it in park (she thought), turned off the engine, and got out. Something in the dashboard compartment had blocked the shift lever and the car was actually in reverse. It started rolling backwards down the driveway. She grabbed it and tugged with all her might and actually succeeded in stopping it when it got to the street. She managed to prevent our car from rolling into our neighbor's parallel parked car immediately across from our driveway. She also managed to hurt her arm quite badly. X-rays and CAT scans and exposure to every sniffling, coughing person in the ER later, and we learned she was lucky and did not break any bones, just sprained her elbow and shoulder. Very very lucky that she didn't get knocked under the wheel by the still open door of the car! My question is this: Can automakers create a safety device to prevent this? If the engine is off and the car is not in park, and no driver is detected in the driver's seat, can they automatically apply the brake? There could be a button or switch to undo the brake for towing. It seems the technology to do this has been around for decades, but the X-ray tech, the ER admissions nurse, my wife's orthopedist, even the lady at our insurance company all had stories of similar happenings. How can such a safety device become standard?
Crash:
Yes
Fire:
No
Injuries:
1
Deaths:
0
#11632117December 23, 2024
UNKNOWN OR OTHER
My MazdaCx9 engine consumes (burns) an excessive amount of oil, necessitating frequent top-offs between oil changes.This issue started after the first oil change and continued since then.
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0
#11627970November 29, 2024
FORWARD COLLISION AVOIDANCE: WARNINGS
On [XXX], [XXX], [XXX] I was driving on an interstate highway with a 65 mph speed limit with no warning and received the following codes which slowed the vehicle to the limp mode. 1) Smart Brake Support and Forward Obstruction Warning 2) Activsense system malfunction 3) Front Radar Sensor Malfunction 4) Engine Malfunction 5) Dynamic Stability Control Malfunction I reported all three incidents to the dealer and no codes were left and the dealership had no solution for the problem. They suggested dirt, sunlight, or blowing debris caused it, but that was not the case. Luckily the first two incidents happened with little or no traffic around but the third was during rush hour and almost caused a major accident trying to get off the highway. I shut the car off, restarted and the problem resolved no lights left on or warnings appearing all three times. Contacted Mazda several times and all representatives at the dealership and California Headquarters claim no knowledge of this happening. I found a few others reporting the same issue and wanted to report this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
Crash:
No
Fire:
No
Injuries:
0
Deaths:
0

← Back to Mazda CX-9