Radiator Fan BMW F20 F21 F30 F31 LCI F32 B48 Cooling Fan Housing 400W 8625439

Radiator Fan BMW F20 F21 F30 F31 LCI F32 B48 Cooling Fan Housing 400W is an original part from the Fan and blower motors group, designed for the cooling system of modern BMW 1, 3, and 4 series units. This used component ensures a factory fit, stable cooling system operation, and proper heat dissipation from the engine bay, which translates into safe vehicle operation.

Specifications and technical data

• SKU: 8625439-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8625439
• Substitutable numbers: 17428625439, 8625439, BG
• Category: Fan Motors

Purpose and function in the cooling system

The presented radiator fan is an electrical component that works with the engine control system and temperature sensors. Its task is to force airflow through the radiator, which stabilizes the coolant temperature in urban conditions, under high engine load, and during idling.

In vehicles with the B48 unit, a properly functioning fan is crucial for maintaining the correct operating temperature, protecting against overheating, and preserving the efficiency of the turbocharger and engine accessories. With a rated power of 400W, the component ensures efficient operation under typical operating conditions for these models.

Advantages of using an original BMW fan motor

Using an original fan motor from the Fan and blower motors group allows you to maintain the parameters specified by the vehicle manufacturer. This means:

• proper cooperation with the factory engine controller and cooling system,
• appropriately selected speed and power consumption characteristics,
• stable operation in a wide range of ambient temperatures,
• reduced risk of diagnostic errors and warning messages.

For the user, this translates into predictable cooling system behavior, no need for adaptation or installation modifications, and the preservation of factory engine thermal safety standards.

Condition, origin, and assembly aspects

The item comes from disassembly and is offered as a used original BMW component. This type of part is an attractive alternative to new replacements, especially in the case of modern models where compatibility with factory electronics and operating parameters is essential.

The fan is structurally prepared for installation in dedicated BMW F-series models, which facilitates installation in place of the factory element. When replacing, it is recommended to check the condition of the radiator, hoses, and electrical connectors to ensure trouble-free operation after installation.

Part selection by numbers and compatibility

The product has an assigned OEM part number and interchangeable numbers, which allows for precise verification of compatibility with a specific vehicle configuration. Before purchasing, it is worth comparing the markings with the currently installed element or service documentation to ensure that the selected fan will work with the control system in a given car.

Thanks to this, you minimize the risk of mismatch, and the replacement process itself is limited to mechanical activities and connecting the factory electrical harness, without the need for installation modifications.

Expanding the cooling system in BMW – the same group of parts

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional fan motors, electric blowers, or fan drive modules, check the available parts in the BMW fan and blower motors category.

Service knowledge and prevention for BMW users

When working with the cooling system and BMW power units, it is worth knowing the typical weak points of individual engine series. A practical guide describing problematic units in the popular 3 series model may be helpful – you can find it in the article Emergency BMW E90 engines: check what can ruin your budget!. This will allow you to better plan inspections, preventive replacements, and consciously choose parts from disassembly.