The Kubota W21TS09997 is a genuine OEM thermostat designed to maintain the correct operating temperature in a wide range of Kubota agricultural, construction, and utility machinery. This critical engine component ensures efficient performance and prevents overheating or undercooling, protecting the engine from potential damage. It is a direct replacement for original parts and is compatible with numerous Kubota B, BX, F, G, GR, K, KX, RTV, U, ZD, and ZG series models.