Cooling & lubrication
Electric cooling fan
Pulls air through heat exchangers when needed.
Behind or within the front cooling assembly.
A controller varies fan operation according to thermal and air-conditioning demands.
A powered breeze for the cooling pack.
Overheating at low speed or poor air-conditioning can involve fan control, power or obstructed airflow.
Fluids use vehicle-specific schedules. Seals, pumps and heat exchangers depend on age, condition and operating history.
Simple seals and filters can be accessible; an integrated pump, buried housing or overheating damage can make repairs more involved.
A BMW cooling fan can run after shutdown as part of thermal control.
BMW combustion models; additional coolant circuits also appear in hybrids and electric BMWs.
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