Behr 1995 BMW 740i Fan Clutch, 376732101 KZC6X_HN352

Product details:

Thermostatically-controlled radiator fans have a temperature-controlled fluid coupling with several desirable features: They are quieter than a direct drive radiator fan in many operating conditions. They speed engine warmups by spinning more slowly at low ambient temperatures. At low temperatures, they turn more slowly than the water pump shaft that drives them; this consumes less horsepower for added performance and improved fuel economy. A defective fan clutch slips too much, too often. This reduces radiator air flows, causing engine overheating and reduced air conditioning efficiency. Badly worn fan couplings can also cause noise and vibration.