Buy with confidence as this sensor plugs right in and has the exact same temp settings as stock. This unit is located on the bottom of the radiator on the right hand side and controls the cooling fan operation. Replaces Polaris part number 4010161. Fits all 2003-04 Polaris Sportsman 600 models and all 2002-04 Sportsman 700 carb models (Does not fit EFI models).