2023 MAZDA CX-9 Unknown Or Other Problems

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....

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...

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.

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.