The Kubota W21TS09998 is a genuine OEM thermostat designed to regulate engine temperature in a wide range of Kubota machinery. This critical component ensures optimal engine performance and longevity by maintaining the correct operating temperature. It is compatible with numerous Kubota BX, B, L, M, LX, MX series tractors, RTV utility vehicles (including RTV-X series), Z-series zero-turn mowers, K-series and U-series excavators, SSV skid steer loaders, SVL track loaders, and various D, V, WG, Z series engines.