While driving approximately 40mph down straight roadway without anything around, the vehicle has unexpectedly slammed on the brakes. This has happened four times to date (11/13/24 — 12/25/24). During two of the instance’s lights flashed on the dashboard and indicated the front right corner sensor of vehicle. During the other two occurrences, lights flashed on the dashboard and indicated the sensor at the rear right corner of vehicle, even though the vehicle was again traveling forward at approx. 40mph. In each case the brakes were unexpectedly applied very hard for several seconds before returning to normal. There were no other vehicles around and no dirt or other obstructions to the sensors. Vehicle was brought into dealer for diagnostics and was told they could not duplicate the concern. I asked the dealership to contact Kia for support and they refused. I then contacted Kia directly asking for assistance in getting this resolved. They responded that they rely on diagnostics from the dealership and only if the dealership can duplicate the issue will anything be done. This is an extremely dangerous drivability issue of which the dealer agrees. But since they have not witnessed it firsthand, no further action is being taken to attempt to find and/or replace whatever part is malfunctioning. In searching the NHTSA website, I see several complaints where individuals have experienced strikingly similar complaints (NHTSA # 11538285, 11485486, 11457515, 11457281, 11589381) with this vehicle.