Every safety complaint, recall and defect investigation the US government
holds on this vehicle.
Owners have filed 39 safety complaints
about the 2021 Mazda CX-9 with the US government. Of those, 7 describe a crash, 1 person was injured and no death is recorded. One recall campaign is open against it, covering the seats.
The most complained-about system is the engine,
named in 20 complaints, 51% of the total.
Compiled from NHTSA's complaint, recall and investigation files
· Covers February 2021 to September 2026 · How this is counted
What is on file
39 complaints on file
39
Complaints
7
Describe a crash
0
Mention fire
1
People injured
0
Deaths
A complaint is an unverified account by the person who filed it, not a
finding of fault. One complaint is one ODI number, which is how NHTSA counts
them.
A recall is the manufacturer conceding a defect, and the repair is free.
Whether one covers your particular car is a question only its VIN can
answer, because a campaign covers a production range rather than a
model year.
Which system owners named
Complaints naming each system
ENGINE 20 · 51%
20 51%
UNKNOWN OR OTHER 6 · 15%
6 15%
FORWARD COLLISION AVOIDANCE 4 · 10%
4 10%
POWER TRAIN 4 · 10%
4 10%
SERVICE BRAKES 4 · 10%
4 10%
VEHICLE SPEED CONTROL 3 · 8%
3 8%
AIR BAGS 2 · 5%
2 5%
BACK OVER PREVENTION 2 · 5%
2 5%
ELECTRICAL SYSTEM 1 · 3%
1 3%
STEERING 1 · 3%
1 3%
SUSPENSION 1 · 3%
1 3%
TIRES 1 · 3%
1 3%
01223
Red marks a system with a recall campaign against it.
One complaint can name several systems, so these add up to more than 39.
When the complaints arrived
By the year NHTSA received them
By the year NHTSA received them, which is not the year the failures
happened. They peaked in 2022 at 11.
12 9 6 3
212021222022232023242024252025262026
This is the year the complaint was filed, not the year the failure
happened. The range runs from 2021 to 2026, the last of them a part year, which is why its column is drawn faint.
Crash test ratings
NHTSA New Car Assessment Program
NHTSA crashes a car into a barrier and a pole and measures what
happens to the dummies inside. This is what it awarded the 2021 Mazda CX-9, and it is a separate
question from what owners report going wrong later.
Test
SUV AWD
SUV FWD
Overall
Frontal crash
Frontal, driver
Frontal, passenger
Side crash
Side barrier
Side pole
Rollover
Chance of rollover
15.9%
15.1%
Stability control standard Forward collision warning standard Lane departure warning standard
A rating belongs to a tested body style and drivetrain, not to the model as a whole, which is why more than one is listed.
A dash means NHTSA did not rate that test for this vehicle.
Mazda North American Operations (Mazda) is recalling certain 2020-2021 CX-9 vehicles equipped with 60/40 split bench second-row seats. The left-side second-row seat may unexpectedly slide forward during a crash. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 210, "Seat Belt Assembly Anchorages."
The risk
A seat that slides forward during a crash can transfer excessive force onto a belted occupant, increasing their risk of injury.
The remedy
Dealers will replace the internal parts of the affected second-row seats, free of charge. Owner notification letters were mailed November 4, 2021. Owners may contact Mazda customer service at 1-800-222-5500, Option 4. Mazda's number for this recall is 5221I.
Mazda North American Operations · up to 8,648 vehicles across all model years covered
In owners’ own words
Quoted from the complaint file
Quoted from NHTSA's complaint file. These are unverified accounts by the
people who filed them, not findings of fault.
FORWARD COLLISION AVOIDANCE: WARNINGS
1 injured · crash · towed
I was in a parking lot and came to a stop and placed the car in reverse to back into a parking space. The back-up camera was on and I began to back into the parking space when the car suddenly lurched/jerked forward and accelerated on its own. The car jumped the parking lot median strip and I hit a tree head on. I had my seatbelt on and the airbag deployed. The car then reversed back off the median into the parking lot. I turned off the car. Insurance company will have it inspected. The vehicle is a total loss. I was injured with a large lower abdomen hematoma and airbag burns on arms, wrists, and chest as well as various bruising. I was fortunate to have not hit pedestrians who were …
NHTSA complaint 11550295, quoted in part. Filed by an owner and not verified by NHTSA or by us.
SERVICE BRAKES
crash · towed · 4,000 miles
AS I WAS DRIVING DOWNHILL WITH MINIMAL SNOW ON THE GROUND, I TAPPED MY BRAKES ABOUT 7 TIMES BEFORE THEY LOCKED UP. I WENT TO TURN TO STAY ON THE ROAD AND THE STEERING WHEEL WOULDN'T BUDGE CAUSING ME TO GO OFF THE ROAD, INTO AN EMBANKMENT. VEHICLE WAS GOING ABOUT 5-10MPH WHEN THIS OCCURED ON A CITY STREET.
NHTSA complaint 11397703. Filed by an owner and not verified by NHTSA or by us.
SERVICE BRAKES
crash · towed
The driver side airbag did not deploy in a front end collision on the drivers side. When approaching a vehicle that had come to a sudden and complete stop, the brakes were applied hard to the Mazda CX-9 in order to stop, but after about 1 second they just totally let go and there was no braking at all and the Mazda continued to move forward until it slammed into the vehicle that was stopped. The MyMazda app sent a message that stated that there was a Brake System Malfunctiom which is exactly what occurred and caused the accident.
NHTSA complaint 11495745. Filed by an owner and not verified by NHTSA or by us.
AIR BAGS
crash · towed
2021 Mazda CX-9 Frontal collision at a speed between 10-20 mph. Car shut down after collision and was not drivable. Concern is the driver side airbag did not deploy. (Neither did passenger but there was no person in the passenger seat)
NHTSA complaint 11523765. Filed by an owner and not verified by NHTSA or by us.
VEHICLE SPEED CONTROL
I entered the interstate normally, with no issues accelerating or merging. While driving at approximately 70 mph, in traffic, all three warning messages appeared on the instrument cluster at the same time: “Smart Brake System Malfunction,” “Driver Attention Alert System Malfunction,” and “Forward Smart City Brake Support Malfunction.” At the same moment, the vehicle began to lose speed. I pressed the accelerator pedal firmly. The speed continued to decrease instead of increasing. I could not accelerate at all. An exit was thankfully immediately available. I took the exit, then continued on a side road, then into a parking lot before I could find a safe place to stop. At no point did the …
NHTSA complaint 11763863, quoted in part. Filed by an owner and not verified by NHTSA or by us.
TIRES
On a high-speed highway (Route 14), the vehicle suffered a sudden flat tire/air loss event, forcing an emergency pull-off onto a narrow shoulder with 65 mph traffic. Subsequent inspection revealed the failed tire and the rest of the set were manufactured in late 2007 (DOT code 4907). These 19-year-old tires were installed by a professional tire shop despite being far beyond their safe service life. Component/System Failed: Tires (Set of 4). Tire Size: 255/50 R20 (Vredestein Wintrac 4 Xtreme, DOT 4907). Available for inspection upon request. Safety Risk: Sudden tire failure at highway speeds created immediate loss-of-control risks and exposed occupants to high-speed semi-truck traffic on a …
NHTSA complaint 11760004, quoted in part. Filed by an owner and not verified by NHTSA or by us.
VEHICLE SPEED CONTROL
crash · towed
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.
NHTSA complaint 11755863. Filed by an owner and not verified by NHTSA or by us.
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 …
NHTSA complaint 11752508, quoted in part. Filed by an owner and not verified by NHTSA or by us.
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 …
NHTSA complaint 11749820, quoted in part. Filed by an owner and not verified by NHTSA or by us.
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.
NHTSA complaint 11745150. Filed by an owner and not verified by NHTSA or by us.
If this is your car and a dealer keeps failing to fix it, your state's
lemon law may require the manufacturer to replace it or buy it back. How
many repair attempts it takes, and how long you have to file, is set by
the state you bought in and by nothing on this page.
Complaints: NHTSA's ODI
complaint file, published October 2, 2026. One
complaint is one ODI number, which is how NHTSA counts them.
Recalls: NHTSA's recall
campaign API, newest campaign on this vehicle filed September 27, 2021.
Investigations: NHTSA's ODI
investigation file, published October 2, 2026.
A complaint is one owner's account and has not been verified by NHTSA or by
us. A vehicle with more complaints is not necessarily worse: models that
sold in larger numbers collect more of them. How this is counted.
G
Compiled and maintained by guarledes Independent developer and analyst