Brand new and never used, directly replaces the old one and easy installation.
Fitment: for Volkswagen Jetta 1998-2005; for Volkswagen Beetle 1998-2005; for Volkswagen Passat 1998-2005; for Volkswagen Golf 1999-2006; for Volkswagen GTI 2006-2010; for Audi A4 1997-2002; for Audi A4 Quattro 1997-2002; for Audi TT 2000-2006; for Audi TT Quattro 2000-2006.
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.