This brand-new engine thermostat with OEM numbers 51064020058 and 51064020063 is suitable for MAN TGS, TGX and TGA trucks. As a key cooling system component, it regulates coolant circulation to keep engine working at constant temperature. Adopting high-quality thermal sensitive component and premium sealing parts, it features sensitive induction, stable performance and leak-proof ability. Made in strict accordance with OEM specifications, it is a perfect aftermarket replacement for aging or faulty thermostats.