BMW F10 F11 F12 F13 Engine Cooling Radiator Fan Shroud 400W 8509740

BMW F10 F11 F12 F13 Engine Cooling Radiator Fan Shroud 400W is an original cooling system component designed for BMW F-series models, ensuring stable heat dissipation from the engine bay. Thanks to its precisely matched power, the fan works effectively with the radiator, helping to maintain the optimal operating temperature of the engine. This is a solution for users looking for a proven OEM component with predictable performance parameters.

Specifications and technical data

• SKU: 8509740-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8509740
• Substitutable numbers: 8509740, 17428509740, 7589031, 17417589031, 7804620, 17427804620, 7575258, 17117575258, 7611348, 17117611348, 7589026, 17417589026
• Category: Radiators

Purpose and function in the cooling system

The radiator fan in BMW F01, F02, F10, and F11 models is responsible for forced airflow through the radiator pack, especially in urban conditions, at low driving speeds, and during high engine loads. The appropriately selected 400W power allows for stable operation across a wide temperature range, which translates into:

• maintaining the proper coolant temperature under high engine load,
• supporting air conditioning performance in high ambient temperature conditions,
• reducing the risk of engine overheating in traffic jams and during prolonged idling.

Thanks to its factory fitment for the F-series platform, the fan works with the vehicle's original control system, which promotes stable and predictable rotational speed regulation.

Compatibility and fitment for BMW

The presented radiator fan is a part from the Water Radiators group and was designed specifically for the construction of the BMW F-series cooling system. This means:

• retention of factory mounting points in the radiator frame,
• compatibility with original electrical connectors in the engine bay,
• proper cooperation with the factory software controlling the fan operation.

This type of fitment reduces the need for installation modifications and allows the part to be treated as a plug-and-play solution within the given BMW generation.

Characteristics of the used component

The offered radiator fan is a used part, sourced from dismantling, which represents a reasonable compromise between cost and functionality. In practice, this means the ability to restore the efficiency of the cooling system while maintaining the manufacturer's original specifications, without the need to resort to replacements with uncertain parameters. For many BMW users, this is a way to maintain component consistency within the entire cooling system.

The importance of a properly selected radiator fan

A functional radiator fan has a direct impact on the durability of the engine, turbocharger, and auxiliary components. Insufficient cooling can lead to overheating, power loss, and accelerated wear of components. It is worth understanding how the entire system works together – from the coolant pump, through the radiator, to the fan and electronic control. A broader discussion of the topic can be found in the article dedicated to the diagnostics and operation of the cooling system: Engine cooling system – overheating, repair, and used radiators.

Expansion and modernization of the BMW cooling system

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as liquid radiators, additional cooling modules, or related hoses, check the available parts in the BMW Water Radiators category.

Summary

BMW F10 F11 F12 F13 Engine Cooling Radiator Fan Shroud 400W is an original cooling system component that allows you to maintain factory engine performance parameters in demanding operating conditions. The used OEM part is a practical solution for drivers who want to maintain the technical consistency of their BMW while controlling repair costs. Choosing this fan is an investment in stable engine operating temperature and predictable vehicle behavior in everyday driving.