BMW 1 3 SERIES E81 E87N E90 LCI COMPLETE SET RADIATOR FAN DIESEL N47 AUTOMATIC

BMW 1 3 SERIES E81 E87N E90 LCI COMPLETE SET RADIATOR FAN DIESEL N47 AUTOMATIC is a factory-original cooling system component designed for installation in the front section of the vehicle. Thanks to its design compliant with manufacturer standards, it ensures stable heat dissipation from the engine unit and proper cooperation with engine accessories and the automatic transmission. This solution is dedicated to users who expect reliable, OEM-compliant cooling system performance in demanding road conditions.

Specifications and technical data

• SKU: 7788906-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 17427788906
• Substitutable numbers: 17427788906, 7788906, 17428506668, 8506668, 64539229021, 9229021, 6453916952664509169789, 6453920629664536930039, 9169526916978992062966930039, 17117788903, 7788903, 6293782, 16326937515, 6937515, 17217529499, 7529499
• Location on the vehicle: Front
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Caps

Purpose and compatibility

The presented radiator fan set is intended for BMW 1 and 3 series E81, E87N, and E90 LCI models equipped with the N47 diesel engine and an automatic transmission. The component is mounted in the front of the vehicle, in the immediate vicinity of the radiator, which enables effective forced airflow through the cooling package at low driving speeds and in urban traffic.

The selection of the component for a specific body version and engine variant should always be verified based on the vehicle's technical data and the manufacturer's part number, which minimizes the risk of installation issues and ensures proper cooperation with the factory electrical system.

Function in the cooling system

The BMW 1 3 SERIES E81 E87N E90 LCI COMPLETE SET RADIATOR FAN DIESEL N47 AUTOMATIC is responsible for controlled cooling of the N47 diesel engine, which generates a significant amount of heat both during highway driving and in urban conditions. In combination with an automatic transmission, this element supports the maintenance of a stable operating temperature not only for the engine unit but also for the associated heat exchangers.

Key tasks of the set include:

• forcing airflow through the radiator during limited natural airflow,
• cooperation with the engine control system regarding fan speed regulation,
• stabilization of coolant temperature across a wide range of loads,
• reducing the risk of overheating the engine unit and accessory components.

Benefits of using an original BMW solution

Using a complete, factory-original radiator fan in BMW 1 and 3 series cars with the N47 diesel engine and automatic transmission provides a number of practical operational benefits:

• Full integration with the vehicle's system – compatibility with factory connectors, mounts, and control logic is maintained.
• Appropriate cooling efficiency matched to the characteristics of the diesel engine and automatic transmission.
• Reduced risk of cooling system malfunction compared to random aftermarket replacements with uncertain parameters.
• Structural consistency with other elements of the cooling package in the front of the vehicle.

Thanks to this solution, it is possible to maintain stable thermal conditions, which promotes the durability of the engine unit, the preservation of performance parameters, and the proper operation of associated systems.

Installation and operational characteristics

The BMW 1 3 SERIES E81 E87N E90 LCI COMPLETE SET RADIATOR FAN DIESEL N47 AUTOMATIC is prepared for installation in factory mounting points in the front of the body. The design intended for the N47 diesel engine and automatic transmission allows for maintaining proper clearances relative to the radiator, hoses, and other accessory elements. A correctly selected component reduces the risk of vibration, noise, and improper cooling under high thermal load conditions.

The used condition means that the element comes from disassembly, which in practice allows for an economical repair of the cooling system while maintaining the manufacturer's original specification. Before installation, a standard visual inspection and verification of proper operation in conjunction with the vehicle's electrical system are recommended.

Related elements and technical knowledge

If you are planning a comprehensive repair or upgrade of the front zone in your BMW and need other elements from the same group, such as covers, overlays, or additional trim, check the available parts in the BMW Overlays category.

In the case of more advanced work on diesel units, it is worth expanding your knowledge about typical faults and ways to remove them – an article describing the impact of accessories on engine performance and refinement may be helpful, available at the link: The second life of the Mercedes OM642 engine – how injectors and the turbocharger restore the power of the 3.0 V6 CDI. Although it concerns a different unit, it well illustrates the importance of properly functioning components for the durability of the entire powertrain.