Product Description This aftermarket radiator fan thermo switch assy provides the most accurate switching temperature. 【Below stock preset temperature】When the coolant reaches about 85°C, our product starts to trigger the cooling fan. This effectively solves the problem of overheating in the engine compartment when you are driving or stuck in traffic. 【Good sealing】The well-made O-ring fits the temperature sensor probe tightly. After installation, your coolant will definitely not spill out of the radiator again. 【Easy to install】 No instructions are needed. Simply drain the coolant, tighten the switch properly and refill the coolant.  Specifications: - Condition: 100% Brand New - Material: Metal/ Copper - Part Type: Radiator Fan Switch - Temperature: 85(±3)°C-ON, 75(±5)°C-OFF - Bolt Size: M14 X 1.5MM - Connects: 2 Pin - Connects Spacing: 6.3mm Replaces OEM Part#: 78035045000 (Below Stock Preset Temperature) 58035045000 (Stock Preset Temperature)  Package Included: 1x Radiator Fan Switch 1x O-Ring Fitment: 2005 250 EXC FACTORY 2001-2006 250 EXC RACING 2002-2003 250 EXC RACING SIX DAYS 2008-2013 250 EXC-F 2011 250 EXC-F FACTORY EDIT 2008-2013 250 EXC-F SIX DAYS 2008-2013 250 XCF-W 2011 250 XCF-W SIX DAYS 2012-2013 350 EXC-F 2012-2013 350 EXC-F SIX DAYS 2012-2013 350 XCF-W