From 1998 to 2025, 1,041 pediatric vehicular heatstroke fatalities occurred, with an average of 37 fatalities yearly. NHTSA assessed direct sensing radar systems in Genesis GV70, Toyota Sienna, and other vehicles, finding detection rates varied between vehicles and seating locations. Testing used Child Presence Detection dummies simulating newborn infants. NHTSA also evaluated aftermarket systems including retrofit devices like Ride & Remind and non-retrofit devices like SensorSafe, finding widely varying detection and alerting features. NHTSA continues investigating performance of strategies to reduce pediatric vehicular heatstroke risk and developing test procedures and performance criteria for evolving technologies.