In older 3 series model cars like the e46 this was accomplished with a belt driven fan on a thermo activated clutch hub.
Bmw e90 radiator fan relay.
20a bmw e90 cigarette lighter fuse.
The fan is mounted between the radiator and the engine and is the main engine cooling fan.
Dynamic stability control dsc or.
The cooling fan is responsible for maintaining proper engine coolant temperature and a c cooling.
When repairing the cooling fan and shroud are replaced as a unit.
When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed.
Relay r2 cooling fan relay relay r3 catalytic converter relay r4 vacuum pump relay relay r5 receiver transmitter relay r6 direction indicator.
Bmw e90 models utilize an electronic cooling fan integrated into the cooling fan shroud.
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.