BMW F20 F21 F22 F30 F31 Cooling Radiator Fan Blade 9140340 1111-5YY0091

BMW F20 F21 F22 F30 F31 Radiator Fan Impeller 9140340 is an original part from the Fan Blades group, designed for the cooling system in popular BMW F-series models. This used OEM part ensures a factory fit, stable fan operation, and predictable cooling system performance under demanding operating conditions.

Specifications and technical data

• SKU: 7640508-8
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7640508
• Substitutable numbers: 17427640508, 7640508, 17427600557, 7600557, 91403401111-5YY0091
• Category: Fan Blades

Purpose and Function in the Cooling System

The radiator fan impeller is responsible for forcing airflow through the radiator core, which stabilizes coolant temperature during city driving, idling, and under load. In BMW F20, F21, F22, F30, and F31 models, a correctly selected impeller is crucial for maintaining safe engine operating temperatures, reducing the risk of overheating, and ensuring proper operation of engine accessories.

The offered part, as an OEM component, works with the factory fan motor and radiator shroud, resulting in predictable airflow distribution and proper operation of the entire cooling assembly.

Construction and Fit for BMW F-Series

The impeller has been specifically designed for the engine bay geometry of the mentioned BMW models, maintaining the correct blade profile and working diameter. This design allows for efficient airflow while maintaining an acceptable level of noise and vibration. Proper blade balancing reduces the load transferred to the fan motor and radiator mounts.

As a part from the Fan Blades category, it is intended for installation in place of the factory impeller, without the need for modifications to the fan brackets or housing, which simplifies servicing and reduces replacement time.

Benefits of Using an Original BMW Impeller

• Factory fit for the cooling system in BMW F20, F21, F22, F30, and F31.
• Stable airflow through the radiator across a wide range of rotational speeds.
• Reduced risk of engine overheating in urban conditions and under heavy load.
• Compatibility with the original fan motor and radiator accessories.
• Economical repair of the cooling system by replacing only the impeller instead of the entire assembly.

Condition, Verification, and Service Application

The component is offered as a used OEM part, allowing for a cost-effective restoration of cooling system functionality while maintaining original manufacturer specifications. This type of part is suitable for standard repairs after mechanical damage to the impeller, as well as for preventative maintenance when excessive blade wear or uneven fan operation is detected.

Thanks to the presence of the OEM part number and interchangeable numbers in the technical specifications, precise identification of compatibility with a specific vehicle configuration is possible, minimizing the risk of selecting the wrong part and facilitating workshop operations.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other parts from the same group, such as additional impellers, fans, or radiator fans, check the available parts in the BMW Fan Blades category.

Technical Support and Part Selection

When selecting a fan impeller, it is important to ensure compatibility with the specific engine and equipment version of the vehicle to maintain proper cooling performance and avoid unwanted vibrations. For extensive powertrain and cooling system repairs, technical materials on diagnostics and the selection of engine and drivetrain components may be helpful.

To deepen your knowledge of diagnosing components interacting with the powertrain and the principles of part selection – including used parts – it is worth reading the article Clutch and Dual-Mass Flywheel – Diagnostics and Part Selection for the Drivetrain, which discusses practical aspects of servicing and can supplement your knowledge when planning larger workshop tasks.