Get your oil cooler fan working properly again with this new sensor. This unit is located on the the oil cooler and controls the cooling fan operation. Replaces Polaris part number 4010274. Fits the following Polaris models: 2004 ATP 330 (If built before 1/05/04) 2000-02 Magnum 325 2003-04 Magnum 330 (Fits 2004 models built before 01/05/04) 2000-04 Trail Boss 325/330 2001-02 Xpedition 325