BMW 1 3 Series E81 E87 E90 M47N2 N47 Engine Radiator Fan Housing Diesel 7788905

BMW 1 3 Series E81 E87 E90 M47N2 N47 Engine Radiator Fan Housing is a cooling system component designed for BMW vehicles with diesel engines, which supports stable fan operation and proper airflow guidance through the radiator. Thanks to its factory geometry and fitment for specific engine generations, it ensures consistency in cooling system operation and reduces the risk of overheating in demanding road conditions. It is a practical solution for users who want to preserve the original engine bay design and maintain cooling efficiency in a diesel engine.

Specifications and technical data

• SKU: 7788905
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 17427788905
• Substitutable numbers: 17427788905, 7788905, 17427801993, 7801993
• Fuel type: Diesel
• Category: Radiators

Purpose and function in the cooling system

The radiator fan housing in BMW E87 and E90 diesel models is responsible for properly directing air through the radiator and protecting the rotating fan from contact with other engine bay components. A correctly selected housing:

• stabilizes the fan's position relative to the radiator,
• reduces lateral airflow losses, improving cooling efficiency,
• protects wires, electrical harnesses, and body components from mechanical damage,
• supports the maintenance of the proper operating temperature of the engine.

For diesel engines that generate high thermal loads, a functional fan housing is an essential element of thermal safety for the entire system.

Compatibility with diesel units

The presented housing has been designed to work with diesel engines used in the BMW 1 Series E87 and 3 Series E90, which translates into a proper fit for the dimensions of the radiator, fan, and structural elements in the front part of the body. The design accounts for the thermal loads characteristic of diesel units, thanks to which it:

• ensures stable airflow even during prolonged highway driving,
• supports fan operation in urban conditions and traffic jams,
• helps reduce coolant temperature fluctuations under high engine load.

Such fitment is particularly important in vehicles used intensively, where the cooling system must maintain repeatable performance in various weather conditions.

Characteristics of the used part

The radiator fan housing comes from dismantling, which allows for preserving the original design and geometry intended by the vehicle manufacturer. A used component is a solution that:

• enables economical repair of the cooling system while maintaining parts with factory specifications,
• reduces the risk of fitment issues typical for some aftermarket replacements,
• allows for maintaining assembly consistency with other components in the engine bay.

For many BMW users, choosing such a component is a reasonable compromise between costs and maintaining the original design concept of the cooling system.

Significance for the Water Radiators category

The radiator fan housing works directly in the vicinity of the liquid radiator, influencing how effectively air flows through the radiator package. In practice, a correctly selected element of this type:

• supports even cooling of the entire radiator surface,
• reduces the risk of local core overheating,
• facilitates maintaining a stable coolant temperature across a wide range of loads.

This is particularly important in vehicles with a diesel engine, where the cooling system operates under high thermal load and requires a properly functioning fan housing as a complement to the radiator itself.

Technical support and additional materials

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 fan housings, mounting frames, or air ducts, check the available parts in the BMW Water Radiators category.

When selecting cooling system components, it is worth considering the vehicle's operating conditions, especially during periods of high temperatures. You can read about the impact of summer heat on the operation of the radiator and fan, and how to wisely use the used parts market, in the guide Summer heat vs. cooling system: used radiators and fans as a guarantee of savings, which will help you better plan your car's service.