.This high-grade water temperature sensor comes with OEM number 349-0721, specially designed for 403C-15 and 404C-2 engines. It accurately monitors real-time coolant temperature and sends reliable signals to maintain normal engine working status. Adopting high-sensitivity sensing elements and sturdy sealed housing, it runs steadily under long-term and heavy-load operation. It strictly meets original factory specifications and is an excellent aftermarket spare part for engine maintenance.