Total Complaints
207 filings
MAZDA CX-9 · model year
207 NHTSA complaints, 10 crash reports, and 4 active recalls for this specific cohort.
NHTSA overall rating
Not crash-tested
New Car Assessment Program
The 2011MAZDACX-9 carries 207 consumer safety complaints in NHTSA's Office of Defects Investigation database for this specific model-year cohort. Within that volume, owners reported 10 crashes, 5 fires, 2 injuries, and 0 fatalities. For crash performance, NHTSA's New Car Assessment Program gave this cohort an overall Not Rated/5 rating, with Not Rated/5 front crash, Not Rated/5 side crash, and 4/5 rollover scores derived from standardized barrier and dynamic tests.
Component-level analysis is where model-year complaints become actionable: the top complaint category for the 2011 CX-9 is service brakes with 97 filings, followed by power train (24) and air bags (22). Concentration in one or two component groups is the classic signature of a systemic defect; a flat distribution usually reflects normal aging, warranty complaints, or isolated build-plant variability. This model year has 4 active recall campaigns, which means the manufacturer is obligated to remedy the covered defect at no charge for the life of the vehicle — the full NHTSA campaign numbers are listed below.
NHTSA currently has 21 investigation files overlapping the 2011 CX-9, and 1 remain open. Owners comparing this cohort against neighboring years should pair the counters above with the complaint-by-year trend on the parent model page — a spike in a single year often tracks to a platform refresh, a new transmission supplier, or an updated ECU calibration. Use the related-complaint feed below to read raw owner narratives before deciding whether any pattern here affects your specific use case.
Total Complaints
207 filings
Crashes Reported
10 reports
Source
NHTSA ODI
Federal complaints database
At or below the fleet median complaint volume.
| Component | Count |
|---|---|
| SERVICE BRAKES | 97 |
| POWER TRAIN | 24 |
| AIR BAGS | 22 |
| ENGINE | 15 |
| ELECTRICAL SYSTEM | 5 |
| UNKNOWN OR OTHER | 5 |
| SUSPENSION | 5 |
| ELECTRONIC STABILITY CONTROL (ESC) | 4 |
| STEERING | 4 |
| VEHICLE SPEED CONTROL | 4 |
| WHEELS | 3 |
| EXTERIOR LIGHTING | 3 |
| SERVICE BRAKES, HYDRAULIC | 2 |
| SEAT BELTS | 2 |
| TRACTION CONTROL SYSTEM | 1 |
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Mazda North American Operations (Mazda) is recalling certain 2007-2012 CX-7, CX-9, and 2009-2012 Maza6 vehicles. These vehicles had their passenger frontal air bag inflators previously replaced under a prior recall using inflators of the same design. The inflators may explode due to propellant deg
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Mazda North America Operations (Mazda) is recalling certain 2009-2011 Mazda6, and 2007-2011 CX-7 and CX-9 vehicles. These vehicles are equipped with certain air bag inflators assembled as part of the passenger frontal air bag modules, and used as original equipment or replacement equipment. In the
SUSPENSION:FRONT:CONTROL ARM:LOWER BALL JOINT
Mazda North American Operations (Mazda) is recalling certain model year 2007-2014 CX-9 vehicles manufactured October 24, 2006, to December 28, 2013. The affected vehicles have front suspension ball joints that may corrode from water leaking into the fitting.
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
Mazda North American Operations (Mazda) is recalling certain 2014-2015 Mazda CX-9 vehicles sold, or ever registered in the states of Alabama, California, Florida, Georgia, Hawaii, Louisiana, Mississippi, South Carolina, Texas, Puerto Rico, American Samoa, Guam, the Northern Mariana Islands (Saipan),
The contact owns a 2011 Mazda CX-9. The contact stated that while attempting to park the vehicle at a slow speed in the driveway, the vehicle suddenly experienced unintended acceleration, lurched forward, and crashed into a tree before coming to a stop. The contact was unable to stop the vehicle during the sudden unintended acceleration. During the failure the vehicle sustained front end damages, but no air bags had deployed. No injuries were reported. The cause of the failure was not yet determined. The contact stated that twice in the day before the unintended acceleration, the vehicle jerked forward in traffic however, the contact attributed the issue to the brake pedal not being firmly depressed or the clutch not properly engaged while shifting gear. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 173,000.
Mileage: 173,000
The contact owns a 2011 Mazda CX-9. The contact stated that while attempting to park the vehicle at a slow speed in the driveway, the vehicle suddenly experienced unintended acceleration, lurched forward, and crashed into a tree before coming to a stop. The contact was unable to stop the vehicle during the sudden unintended acceleration. During the failure the vehicle sustained front end damages, but no air bags had deployed. No injuries were reported. The cause of the failure was not yet determined. The contact stated that twice in the day before the unintended acceleration, the vehicle jerked forward in traffic however, the contact attributed the issue to the brake pedal not being firmly depressed or the clutch not properly engaged while shifting gear. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 173,000.
Mileage: 173,000
While driving the side airbags exploded and I had to stop in the middle of the street, get vehicle towed to mazda dealer in Alpharetta, GA Now, im without a vehicle. What do I do now?
The contact owns a 2011 Mazda CX-9. The contact stated that while driving at an undisclosed speed and making a turn, the contact lost control of the vehicle, and the front driver's side suspension lowered to the ground. The vehicle was towed to an independent mechanic, who determined that the subframe was severely rusted, causing the control arm to detach. The contact was informed that the subframe needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.
Mileage: 125,000
The contact owns a 2011 Mazda CX-9. The contact stated that while driving at an undisclosed speed and making a turn, the contact lost control of the vehicle, and the front driver's side suspension lowered to the ground. The vehicle was towed to an independent mechanic, who determined that the subframe was severely rusted, causing the control arm to detach. The contact was informed that the subframe needed to be replaced. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 125,000.
Mileage: 125,000
I had an issue with the AWD not engaging and the 4x4 light illuminating when driving on snow and ice. No indicators when driving under normal conditions. I had no traction and had difficulty maintaining control of the vehicle while driving at speeds less than 25 mph. I had difficulty gettting momentum from a stop as the tires were spinning and engaging tracion. I took the car into a Mazda dealership for a full circle inspection and found that the 4x4 light was illuminating due to worn-out splines connecting the transfer case. The technician was able to spin the driveshaft, indicating the splines are damaged and need to be replaced. Recommendations were to replace the transmission and transfer case with a repair estimate of $5469.61. Additionally, the technician observed some seeping of oil coming from the tiing cover and reccommends re-sealing it as well as replacing the water pump ( another known failure issue in which Mazda is aware of). Cost estimate of $4319.78. The technician also
Brake booster failure. The power assisted braking has stopped working. There are no leaking vacuum hoses and the check valve is working. The brake pedal travels to the floorboard.
Driving kids to school a few months ago. Car started to smell like burning rubber. I thought it was the garbage truck ahead of us. As we turned the corner 2 blocks later, the car dead stopped and we all went flying forward. It jerked so hard, we are lucky our necks didn't snap. I put the car in park and turned it off. I waited a few minutes as I was too worked up, and started the car again. We got about 50ft before a very loud noise began, almost as if something was dragging underneath. I stopped, and had it towed home. I then had it towed to mechanic. They said bad TRANSFER CASE & DRIVE SHAFT. - TRANS PAN GASKET. I am a single mom with no money to afford to have it fixed in fear of it going bad again. They quoted me 3,500 here in PA.
The contact owns a 2011 Mazda CX-9. The contact stated while driving 20 MPH, there was an abnormal sound coming from the brakes. The contact stated that the brake pedal was firm and difficult to depress while attempting to stop the vehicle. The vehicle was not diagnosed or repaired. The manufacturer was contacted, and a case was filed. The failure mileage was 67,000.
Mileage: 67,000
Braking trouble recent in weeks in 2011 Mazda CX-9 vehicle. Had mechanic (Euro Motorsports in Chagrin Falls OH) check it out. Turned out to be a faulty Brake Booster. Mechanic test drove car; braking failed and he almost rear-ended another vehicle. He found on line a Mazda service notice dating from April 4, 2014 called SSP93. Mazda issued an extended warranty of 7 years or 90,000 miles, whichever came first, to have defective part replaced by an improved part. But we were never informed by Mazda of Bedford, where we bought the vehicle. Currently, our vehicle has about 83,000 miles. Never knew there was a problem until recent trouble with the braking. There are thousands of CX-5, Cx-7, and Cx-9 vehicles in operation in U.S. right now; probably many owners have no idea there is a brake defect in their vehicles that could cause a serious accident, potentially fatal. Mazda should have done a recall in 2014, not an extended warranty. Although Brake Boosters are supposedly good f
The front door windows no longer work. Most recently, the drivers side back door will NOT open. The lock is completely jammed - will not open or shut, which is a safety hazard for my child. The plastic parts in this car are failing and putting my family at risk.
Defective water pump located inside the engine that when failure occurs can cause coolant to leak into engine causing complete engine failure. This is a major safety hazard due to the fact that these cars with defective water pumps can break down with very little warning in the middle of a freeway! I have contacted Mazda who refuses to do anything due to it being outside warranty but will not acknowledge the safety concern sudden engine failure can cause on a perfectly maintained car. In California there is currently a lawsuit against Mazda for this issue and hundreds of other Ford and Mazda owners who have been caught in very dangerous situations due to this water pump failure issue. The situation we were involved in could have gone very differently and that was my family in the vehicle that Mazda seems to care about a couple thousand dollars more then the value of life... is just ridiculous! Please do the research yourself so no one has to loose their life over this.
When getting off highway engine began to knock. Engine stalled and would not restart. Upon inspection the water pump was found to have failed and leaked engine coolant into oil. This caused engine to have a complete failure. No check engine light illuminated but when car was scanned multiple codes were found. The car was also found to have a bad Transfer Case.
When getting off highway engine began to knock. Engine stalled and would not restart. Upon inspection the water pump was found to have failed and leaked engine coolant into oil. This caused engine to have a complete failure. No check engine light illuminated but when car was scanned multiple codes were found. The car was also found to have a bad Transfer Case.
The contact owns a 2011 Mazda CX-9. The contact stated while driving 60 mph, upon approaching oncoming traffic, the vehicle unexpectedly shut-off. The contact was able to restart the vehicle and pulled the vehicle off to the shoulder. The contact stated that upon restarting the vehicle, the check engine warning light illuminated. Due to the failure and the warning light, the contact had the vehicle towed to an independent mechanic. Upon inspection of the vehicle, the mechanic informed her that coolant had leaked into the oil cylinder and they referred her to a dealer for assistance. The contact then had the vehicle towed to the dealer where they diagnosed the vehicle with a defective water pump as well as engine failure. The manufacturer was also notified of the failure and stated that the failure was caused due to poor maintenance. No further assistance was provided. The vehicle had yet to be repaired and remained in the possession of the dealer. The failure mileage was approximately
Mileage: 144,000
SIRT: I PURCHASED MY 2011 MAZDA CX 9 FROM MY CLOSE FRIEND [XXX] ON DEC.05 OF 2014! [XXX] HAD NOT BEEN ISSUED A SPECIAL SERVICES PROGRAM ABOUT THE BRAKE BOOSTER! WELL I NEVER RECEIVED THIS INFO EITHER? IN FACT I HAD TWO RECALL THAT WERE TAKEN CARE OF BY THE LOCAL MAZDA DEALER HERE IN THOUSAND OAKS CALIF. THIS KNOWN BRAKE BOOSTER DETONATION HAS BEEN KNOWN BY MAZDA.IOT IS A VERY DANGEROUS CONDITION AND IS NOT TO SAFE TO DRIVE THE CAR AT ALL- I WILL NOT DRIVE THE CAR AND SEETHE ORIGINAL MATTER SHOULD HAVE BEEN LET IT BE KNOWN TO MYSELF AND FEEL THE MATTER SHOULD BE ADDRESSED ASAP BY MAZDA -THANK YOU [XXX] ADDING BACKING -VERY HARD BRAKE - WHEN DRIVING IT HAD TO REALLY STAND HARD ON THE BRAKE TO STOP CAR B! ALL INDICATIONS POINT TO A BRAKE BOOSTER FAILURE ! TO SUMMARIZE IO WAS NEVER NOTIFIED BY MAZDA ABOUT THE SPECIAL SERVICE PROGRAM FOR THE REPAIR OF THIS EXTREMELY UNSAFE BRAKE PROBLEM! INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).
Mileage: 80,106
WATER PUMP LEAKING IN ENGINE MIXING WITH OIL
Mileage: 89,000
WATER PUMP LEAKING IN ENGINE MIXING WITH OIL
Mileage: 89,000
I PURCHASED A VEHICLE FROM A BUY HERE PAY HERE AND LATER REALIZED AFTER TWO WEEKS OF HAVING THE CAR THAT HAS A RECALL FOR THE AIRBAG ON THE PASSENGER SIDE...BUT THE CAR WAS SOLD AS IS FROM AUTO SALES IN BUFORD GA
WHILE DRIVING THE CAR ON A COUNTY ROAD, WITH THE SPEED UNDER 40 MPH, AND FOLLOWING THE BEND IN THE ROAD TO LEAD TO GETTING ON THE HIGHWAY, THE CAR JERKED FORWARD AS IF I HIT SOMETHING. AS I CONTINUED TO DRIVE, THE CAR WAS MAKING LOUD CLINKING SOUNDS AND WAS JERKING IN MOTION. NO WARNING LIGHTS WENT ON. WHILE ATTEMPTING TO CONTINUE TO DRIVE, CLANGING NOISES COULD BE HEARD AND THE CAR CONTINUED TO JERK FORWARD. THE CAR WAS UNABLE TO BE DRIVEN. AFTER HAVING IT TOWED TO MY MECHANIC, IT WAS DETERMINE THE PROBLEM WAS THE TRANSFER CASE. THE SPLINES BETWEEN THE TRANSMISSION AND TRANSFER CASE HAD BEEN EATEN AWAY BY RUST. THE SEAL HAD NOT KEPT WATER OUT AS IT WAS DESIGNED TO DO. A NEW TRANSFER CASE WAS ORDERED AS WELL AS A NEW TRANSMISSION. THE REPLACEMENT TRANSFER CASE HAD SHOWN SIGNS OF THE SAME ISSUES WITH THE SPLINES. ANOTHER (2ND ONE) TRANSFER CASE HAD TO BE ORDERED. I HAD PURCHASED THIS CAR IN FEBRUARY 2019 USED. THE CAR HAD A CLEAN TITLE, NO ACCIDENTS AND WAS SERVICED REGULARLY. WIT
Mileage: 118,000
Momentary increase in steering effort after recall remedy
Inadvertent Curtain Air Bag Deployment
Front Subframe Corrosion
Lower ball joint separation
Brake Booster Failure
Data as of 2025. Sources: NHTSA Office of Defects Investigation (ODI) complaints database, NHTSA recall campaign API, NHTSA NCAP crash-test ratings, and NHTSA FARS for fatality cross-reference.
Read our methodology — how this data is sourced, computed, and verified.