Component/System Involved: Infotainment system / radio head unit (including display, CarPlay integration, and volume control) Incident Description: Since purchasing the vehicle in 2020 with approximately 11,000 miles, the infotainment system has malfunctioned in ways that present a significant safety risk. The most severe issue is a random and uncontrollable spike in audio volume, where the system will suddenly jump from a low setting (e.g., volume level 8) to the maximum setting (level 40) without user input. This has occurred during normal driving conditions and once caused me to startle so badly that I momentarily lost control of the vehicle and struck a light pole base while backing out of a parking lot. The car sustained minor paint damage, but the emotional and physical impact was severe, and the event could have led to a serious accident had there been pedestrians or other vehicles nearby. The display system also randomly reboots itself, emits unexplained notification-like pings while driving, and occasionally becomes unresponsive. These issues are intermittent and cannot be reproduced on command, which has made diagnosis difficult. The problem was originally reported to Nissan of Omaha, who failed to order a replacement unit or retain records of the complaint. I later transferred service to Cornhusker Nissan of Norfolk. In 2023, while the vehicle was still under extended warranty (under 70,000 miles), Cornhusker Nissan replicated some symptoms but stated that sinc