The Kubota W21TS08679 is a genuine OEM thermostat designed to regulate engine temperature at 86.7°C (188°F) for optimal performance. This essential component is compatible with a wide range of Kubota engines including D722, D902, D1005, D1105, D1305, D1505, V1505, V2203, V2403, V3307, V3600, and V3800. It also fits numerous Kubota B, L, M, MX series tractors, KX series excavators, R/SSV series loaders, and ZD series mowers, ensuring efficient engine operation and preventing overheating.