While traveling from Los Angeles, California to Tucson, Arizona with one passenger, the vehicle experienced a sudden and dangerous loss of multiple critical systems while driving at highway speed. Earlier during the trip the vehicle stopped in Quartzsite, Arizona. When attempting to re-enter the vehicle, the key initially did not unlock the vehicle. The driver contacted Range Rover roadside assistance and asked for guidance, but no explanation or solution was provided. After several attempts the vehicle eventually unlocked and started. Approximately one hour later, while driving eastbound on Interstate 10 at highway speed after dark, a yellow battery warning light appeared on the dashboard. Shortly afterward a red battery warning and a red triangle warning appeared. Within minutes of these warnings, the vehicle suddenly lost propulsion and the transmission shifted into neutral. Immediately afterward, the vehicle lost electrical power and the dashboard and exterior lights went dark. At the same time, steering assistance and brake assist were lost, making it extremely difficult to control the vehicle. The driver had difficulty steering the vehicle and slowing it safely while traveling on a busy highway with heavy truck traffic behind. Because steering assistance and brake assist were lost, the driver had very limited ability to maneuver the vehicle safely. The driver was able to slowly reduce speed and move across several lanes of traffic to the right shoulder of the highway, stopping near Exit 109 (Sun Valley Parkway) on Interstate 10. The vehicle stopped approximately 300 feet before the exit ramp. Because the vehicle had lost electrical power and exterior lighting, the vehicle was difficult for other drivers to see in the dark. Several large trucks passed close to the stopped vehicle. The driver used a mobile phone light to signal the vehicle’s presence and reduce the risk of being struck. The vehicle was later towed to an authorized Range Rover dealership in Tucs
NHTSA ODI 11723728