This allows infinite speed regulation unlike hi low speed on older cars and helps increase efficiency and fuel economy.
Bmw e90 radiator fan replacement.
When a bmw e90 cooling fan fails the fan will not activate or only activate at high speed.
Remove the coolant reservoir cap.
A bmw e90 cooling fan replacement may be necessary if it is not turning on when the radiator temperature exceeds normal operating levels.
Fixes bmw e90 models have an advanced radiator fan control which uses a pulse width modulated or pwm signal to regulate the fan speed.
The cooling fan is responsible for maintaining proper engine coolant temperature and a c cooling.
One of the most common failure points on aging bmw s is the cooling system.
The cap must be removed for the bmw e90 radiator to drain properly.
Remove protective plastic belly pan skid plate from the underside of your vehicle.
Bmw e90 models utilize an electronic cooling fan integrated into the cooling fan shroud.
For instructions on how to do this please read our article bmw e90 cooling fan replacement 2007 2013 3 series.