2023 Mazda CX-9 owner complaints

While driving down a 55mph highway with no cars around, our sunroof imploded with a loud crashing sound and spreading glass shards all over our car over all of the occupants including children. It was a cloudy day and the temperatures were in the low 70’s and our sliding fabric cover was open at the time. The dealer has the car as of today but claims that anything glass is not typically covered under warranty.

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 chi

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 chi

This vehicle does not have a Traction Control Device switch to manually turn off. In snowing conditions and trying to ascend a grade, the TCD activates and eventually you become disabled in the roadway. I looked into the car manual and it does locate where the switch should be located, however my vehicle switch button is a blank button. I phoned my Dealership and reported the problem. They advised other vehicles in their lot did not have the switch as well. No other advice was explained. I reached out to Mazda Customer Car, and they advised me to contact the dealership. Problem remains un resolved.

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 def

The contact owns a 2023 Mazda CX-9. The contact stated while driving at 30 MPH, the steering wheel was seized and the brake pedal stiffened. The contact stated as a result of the failure, the vehicle crashed into a ditch and crashed into a tree. The contact stated that the air bags did not deploy. The contact stated that his wife was a passenger in the vehicle and was seated in the front passenger seat. There were no injuries sustained. The front driver's side of the vehicle was damaged during the crash. No police or fire report was filed. The vehicle was towed to the contact's vacation home in Wisconsin. The contact stated that the vehicle had previously been serviced by the dealer on four occasions due to a failed software update. The vehicle was not diagnosed or repaired by an independe

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

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 th

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.

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

I was approaching Breezewood, Pa coming south on 70 into town from Hagerstown. Traffic comes to a stop awaiting a light that stops the highway traffic before allowing people to proceed through Breezewood and then continue on 70 out of town. I had plenty of warning as traffic slows first from 55 to 45, then to 35 before the light. As I applied pressure to the brakes the vehicle would not slow down. I released them once and reapplied and it felt as if they were doing nothing to slow me down. There were a lot of cars ahead of me and around me and the car did hold its lane thank goodness, but I ended up colliding with a stopped pickup/trailer (Ram with a car carrier/flatbed trailer). None of the vehicles collision avoidance warnings or safety features seemed to assist in the warning of t

What component or system failed or malfunctioned, and is it available for inspection upon request? **Automated liftgate failure with risk of crushing. When pressing the automatic liftgate button, if there is an obstruction, the liftgate has unreliable/ineffective sensors ("jam-safe equipment") to prevent items and body parts from being crushed. In my instance, items in the trunk were crushed until the fuse blew for the liftgate. I believe this could have caused serious harm if a body part was accidentally wedged between the liftgate and preventing it from closing. **The fuse has been replaced and liftgate is now operational. It is available for inspection upon request. **Upon inquiring with Mazda, the dealer stated that "Mazda does not publish any data pertaining to your question “what str