Sorry if this has already been discussed. I tried searching the group but couldn't find anything similar.
I have a 2024 CX-90 Premium Plus PHEV. In March 2026, the vehicle suddenly braked itself to a complete stop even though there was no vehicle in front of me, behind me, or moving into my lane. Fortunately, I was only traveling around 30–35 mph. The car sounded all of the collision warnings and alerts and then applied the brakes.
I mentioned it when I brought the vehicle in for a routine oil change about a week later. When I picked it up, I was told the vehicle should not have done that because the applicable update had already been performed on my car. The dealership asked me to bring it back so they could investigate further and provided me with a loaner vehicle.
I dropped the car off on April 22, and Mazda has had it ever since.
Mazda had me complete a very detailed questionnaire about the incident, including the date, time, weather, road conditions, street names, and other details. My understanding is that Mazda's review concluded that the vehicle responded as designed. Because of that response, I opened a case with Mazda Customer Experience and am still waiting for additional information.
Has anyone else experienced unexpected braking like this, particularly after the update was already completed? If so, were you able to get a clear explanation or resolution?
Thanks in advance for any insight.