2025 Porsche Cayenne Driver Assist & ADAS Problems

The attached photos show several instances where the car’s safety systems failed. These cases have been erratic, and begin and end frequently. The car is under warranty, but my dealer cannot discern what causes the problems.

Multiple dash messages indicating failure of driver assistance systems.

At approximately 57 miles after delivery of a new 2025 Porsche Cayenne, the Adaptive Cruise Control (ACC) and related driver-assistance safety systems failed while the vehicle was traveling at approximately 67 mph. There had been no collision, impact, or abnormal event prior to the failure. Porsche’s diagnostic logs (PIWIS) confirmed the system failure occurred while the vehicle was traveling at approximately 67 mph. A physical inspection of the vehicle showed no evidence of collision, abnormal G-force event, or exterior damage that would explain the system failure. The malfunction disabled a key driver-assistance safety feature on a nearly new vehicle. The vehicle was returned to the selling dealer for repair and the manufacturer, Porsche Cars North America, was notified. Both the dealer and manufacturer indicated that the issue was not considered a defect and declined to provide further explanation as to how such a failure could occur at extremely low mileage without any external factors. Given the extremely low mileage at which this safety system failure occurred, this may indicate a defect affecting the vehicle’s driver-assistance or ADAS systems. A failure of Adaptive Cruise Control and related driver-assistance systems at highway speed raises potential safety concerns for vehicle occupants and surrounding traffic. The failure occurred at extremely low mileage with no apparent triggering event, raising concern about a potential premature failure of a safety-related driver-assistance system.