Bmw E90 Radiator Fan Relay

The cooling fan is responsible for maintaining proper engine coolant temperature and a c cooling.

Bmw e90 radiator fan relay.

In older 3 series model cars like the e46 this was accomplished with a belt driven fan on a thermo activated clutch hub. Relay r2 cooling fan relay relay r3 catalytic converter relay r4 vacuum pump relay relay r5 receiver transmitter relay r6 direction indicator. On all bmw models up through the late 90s the auxiliary or main fan is controlled by one or two thermostatic switches that are mounted into the radiator side or bottom tanks. The bmw e90 cooling fan s main function is to move air through the radiator when the vehicle is stationary or moving at slow speeds.

When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed. Bmw e90 models utilize an electronic cooling fan integrated into the cooling fan shroud. The fan is mounted between the radiator and the engine and is the main engine cooling fan. 20a bmw e90 cigarette lighter fuse.

There is no engine driven mechanical fan.