This brand new oil pressure sensor switch is designed to match 400 series diesel engines precisely. It keeps track of real-time lubricating oil pressure and delivers valid signals to engine circuits. It can trigger timely alarm hints once pressure goes beyond normal range, thus protecting internal engine parts effectively. Featuring outstanding heat resistance and fine sealing performance, it runs smoothly under continuous working conditions. Produced strictly following original design standards, it owns sensitive reaction, easy fitting and long service span for daily engine upkeep.