NHTSA Complaint #11586254 — 2018 HYUNDAI TUCSON

KSDS engine software update was performed by Hyundai dealer on January 22, 2024. On or about February 11, 2024, the vehicle began stalling, intermittently, and would not restart for several minutes. On March 4, 2024, the vehicle stalled and, upon restarting, after nearly a 30 minute wait, it would not exceed 35 mph. The vehicle registered, nor recorded, any diagnostic codes at any time, during these events. The vehicle was taken to Edwards Hyundai service center for diagnosis and repair. No diagnostic codes were recorded in the vehicle history. Upon inspection, Edwards changed a loose timing chain and exhaust camshaft. The vehicle was picked up on 3/13/2024 and presented with the same issue on 3/14/2024, with the engine stalling and failing to restart for several minutes. When the vehicle did restart, it would not exceed 35 mph. It was then returned to Edwards Hyundai on 3/15/2024, where it duplicated the issue for Service Writers, failed to restart, and had to be pushed out of the service garage. The vehicle has since, without further diagnosis or repair, started and ran for technicians, who have since supposedly driven, approximately, 200 miles, in an effort to determine the issue. Edwards Hyundai then demanded the return of a loaner vehicle, in an effort to force us to retake possession of the vehicle, having failed to properly diagnose or repair the issue. A complaint has been filed with Hyundai corporate, which resulted only in them also trying to convince us to accept return of the vehicle in said state of disrepair. It has since become very clear, as evidenced by numerous reports of Hyundai vehicles experiencing the same effects and mechanical issues, after receiving the KSDS software update, that Hyundai, both at the corporate and service level, have been dishonest, as to being unaware of the cause of the issue and what must be done to resolve it. Given that the potential end result of the customer retaking possession of the vehicle in its