The Fendt ACW288805A DEF Sensor is a genuine OEM (Original Equipment Manufacturer) part designed for precise Diesel Exhaust Fluid (DEF) level and quality monitoring in Fendt Vario series tractors. This critical component ensures optimal performance of the Selective Catalytic Reduction (SCR) system, contributing to emission compliance and engine efficiency. It is compatible with various Fendt 700, 900, and 1000 Vario models, including specific Gen 6 and Gen 7 variants.