Never used, directly replaces the old one and easy installation.. Fitment: for BMW X1 2012-2017, for BMW X3 2013-2017, for BMW Z4 2012-2016, for BMW 528i 2012-2016, for BMW 428i 2014-2016, for BMW 328i 2012-2016, for BMW 428i Gran Coupe 2015-2016, for BMW 428i xDrive Gran Coupe 2015-2016, for BMW 320i xDrive 2017. OE Number: 11538648791, 11538635689, 11537633476, 11537588257, 11537633477, 11538636594, 11538636595.. 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.. Package Included: 1 x Thermostat Housing Assembly.
