The Kubota W21TS09974 is a genuine OEM thermostat designed to regulate engine temperature in a wide range of Kubota equipment. This critical component ensures optimal engine performance and prevents overheating by controlling coolant flow. It is compatible with numerous Kubota engine series, including D1005, D1105, D1305, D1503, D1505, D1703, D1803, V1505, V2003, V2203, V2403, and V3300, found in tractors, utility vehicles, and excavators.