Brand new and never used, directly replaces the old one and easy installation. Fitment: for Honda Civic LX-S, Si 2.4L L4 - Gas 2015, for Honda Civic Si 2.4L L4 - Gas 2009-2014, for Honda Civic MUGEN Si, Si 2.0L L4 - Gas 2008, for Honda Civic Si 2.0L L4 - Gas 2006-2007, for Honda CR-V EX, EX-L, LX 2.4L L4 - Gas 2012-2014, for Honda CR-V EX, EX-L, LX, SE 2.4L L4 - Gas 2011, for Honda CR-V EX, EX-L, LX 2.4L L4 - Gas 2007-2010 OEM Number: 19301-RAF-003, 19301-RAF-004, 19301RAF003, 19301RAF004.,19301-PNA-003, 19301PNA003,143-0819 Good Replacement: The engine's thermostat regulates the temperature of the engine by controlling coolant flow. A bad or failing thermostat: high temperature reading and engine overheating, low temperature reading and underheated engine, temperature changing erratically, coolant leaks around thermostat housing or under the vehicle. How to fine thermostat: You can find your car's thermostat by starting at the upper radiator hose and following it to w it enters the top of the engine. Package Included: 1 x Thermostat Housing Assembly