Is your Hyundai running hot or leaking coolant? A cracked thermostat housing could be the culprit. This OCESTORE Coolant Thermostat Housing Assembly is a direct replacement for OEM part number 25500-23001 (also listed as 2550023001). It's a brand new aftermarket part built to meet the original specifications. This housing is crucial—it holds the thermostat, which regulates engine temperature by controlling coolant flow to the radiator. This one is made from a combination of plastic and metal (giving it a silver color) and is designed to be a direct fit for a range of Hyundai models over many years. Please double-check the extensive fitment list! It includes vehicles like the Tucson (2005-2015), Sonata (2008-2014), Elantra (1996-2011), Santa Fe (2010-2012) and Santa Fe Sport (2013-2016), Accent, and Tiburon for specific years listed. Installation is generally straightforward, replacing the old, possibly leaking unit. The package includes one housing assembly. OCESTORE offers a 12-month warranty on this part, so you can buy with confidence. A reliable, cost-effective fix to get your cooling system back in shape and your engine running at the right temperature.