Brand new and never used, directly replaces the old one and easy installation.
Fitment: for Nissan 370Z 2009-2021, for INFINITI EX35 2011-2012, for INFINITI EX37 2013, for INFINITI FX35 2011-2012, for INFINITI FX37 2013, for INFINITI G25 2011-2012, for INFINITI G37 2009-2013, for INFINITI I30 1996-2001, for INFINITI M37 2011-2013, for INFINITI Q40 2015, for INFINITI Q50 2014-2016, for INFINITI Q60 2014-2015, for INFINITI Q70 2014-2019, for INFINITI Q70L 2015-2019, for INFINITI QX50 2014-2017, for INFINITI QX70 2014-2017
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 where it enters the top of the engine.