BMW E81 E87 E90 Radiator Fan Housing 118d 120d 318d 320d Motor 400W 7788906

BMW E81 E87 E90 Radiator Fan Housing 118d 120d 318d 320d Motor 400W is an original cooling system component designed for installation in the front of the vehicle. It ensures stable cooling of the power unit, which translates into safe engine operation under various road conditions. Thanks to a design compliant with BMW standards, this fan is a functional service solution for users of 1 Series and 3 Series models with diesel engines.

Specifications and technical data

• SKU: 7788906-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7788906
• Substitutable numbers: 17428506668, 8506668, 17427788906, 7788906, 16326937515, 6937515
• Location on the vehicle: Front
• Category: Caps

Purpose and function in the cooling system

The presented radiator fan is designed to operate in the front zone of the vehicle, where it is responsible for forced airflow through the radiator. In practice, this means maintaining the proper coolant temperature during both city driving and under higher engine loads.

This component is particularly important in cars with diesel engines, where stable heat dissipation has a direct impact on the durability of the power unit, turbocharger, and auxiliary equipment. The 400W power provides an adequate performance reserve, allowing the fan to operate efficiently even at high ambient temperatures.

Compatibility with BMW models

The fan has been developed for selected BMW 1 Series and 3 Series models, such as the E81, E87, and E90 in the 118d, 318d, and 320d versions. The design is adapted to factory mounting points and the original engine bay architecture, which facilitates installation and reduces the risk of fitment issues.

Thanks to the use of the original OEM part number and associated replacement numbers, this component can be precisely verified against the manufacturer's catalog or service documentation. This allows mechanics and users to safely select a compatible fan without the need for system modifications.

Technical specifications and installation

The radiator fan is adapted to operate in the vehicle's electrical system as a 400W fan. Its placement in the front of the car ensures optimal airflow through the radiator while allowing relatively convenient service access during replacement.

In practice, installation involves:

• seating the fan in the factory mounting points at the radiator,
• connecting the electrical connector compatible with the BMW system,
• checking for proper operation across various temperature and load ranges.

This type of solution allows for maintaining consistency with the factory cooling system, which is essential for both reliability and the correct operation of engine control units.

Product condition and benefits of using a used part

The offered radiator fan is a used part, sourced from vehicle dismantling. For many users, this represents a reasonable compromise between repair costs and maintaining original BMW specifications. Choosing such a solution allows for cost savings while benefiting from a component that meets factory requirements.

Using an original radiator fan in good working condition can:

• restore proper cooling system operation after a fan failure,
• increase engine thermal safety during traffic jams or on hot days,
• reduce the risk of engine overheating and associated costly repairs.

Support with selection and additional materials

When selecting this component, it is worth paying attention to manufacturer markings, reference numbers, and placement on the vehicle. In our store, parameters such as brand, condition, or placement on vehicle are presented in a way that facilitates quick comparison with your vehicle. Additionally, thanks to the OEM part number and replacement numbers fields, precise verification of compatibility with the BMW catalog is possible, and the SKU identifier simplifies order processing.

If you want to better understand how using properly selected components can affect car performance and operating characteristics, check out our guide: How to increase engine power: a practical guide to engine tuning with used parts. This is a good supplement to knowledge for those who combine standard repairs with light tuning.

If you are planning a comprehensive repair or upgrade of the body area in your BMW and need other components from the same group, such as covers, trims, or additional moldings, check out the available parts in the BMW Trims category.