Air Duct with Air Flap Control, Upper

The genuine BMW Upper Air Duct with Air Flap Control (51745A571A4) is compatible with the BMW 1 Series F70 (from 03/2023) and BMW 2 Series F74 Gran Coupé (from 06/2023).

This genuine OEM BMW part (51745A571A4) is the original upper air duct with integrated air flap control used within the front cooling and air management system on the compatible BMW models listed above. According to the official BMW parts catalogue, this component has been in use from 01/07/2024 and remains a current part with no replacement listed.

The integrated air flap control helps regulate airflow through the front cooling system, allowing the vehicle to optimise engine cooling and aerodynamic efficiency according to operating conditions. This contributes to maintaining the correct engine temperature while supporting overall vehicle efficiency and performance.

As a genuine OEM BMW part, this upper air duct with air flap control is produced to BMW’s original specifications, ensuring precise fitment, outstanding durability and reliable long-term performance. It installs directly in place of the original component without modification, making it the ideal replacement for a damaged or faulty factory-installed part.

Official BMW parts information confirms that 51745A571A4 is the correct upper air duct with air flap control for the compatible BMW models listed above. Choosing a genuine OEM BMW replacement part helps maintain factory-correct fitment, efficient airflow management and the long-term reliability expected from original BMW components.

Part 51745A571A4 is identified as number 04 in the diagram.

For vehicles:

• with Preparation, emergency vehicle S138A=No
• with CO2 equipment S1CBA=Yes