Compatibility: 2001-2005 BMW 320i 2001-2005 BMW 325Ci 2001-2005 BMW 325i 2001-2005 BMW 325xi 2001-2005 BMW 330Ci 2001-2005 BMW 330i 2001-2005 BMW 330xi For more details, pls check compatibility Chart. What is a Radiator? A radiator is a component of the engine's cooling system that removes heat from the engine. The process begins when the thermostat in the front of the engine detects overheating. Then coolant and water get released from the radiator and sent through the engine to absorb this heat. .
