Air Duct with Air Flap Control, Lower

The genuine BMW Lower Air Duct with Air Flap Control (M) (51745A25891) is compatible with BMW 2 Series G42 Coupé (2020 onwards).

This genuine BMW OEM lower air duct forms part of the vehicle’s front air management and cooling system, directing airflow efficiently through the active air flap control assembly to optimise engine cooling and aerodynamic performance. It integrates seamlessly with the surrounding cooling components, helping to maintain the factory-designed airflow characteristics and overall efficiency of the vehicle.

Part number 51745A25891 is the genuine BMW M lower air duct with air flap control specified for compatible BMW 2 Series G42 Coupé models equipped with CO₂ Equipment (S1CBA=Yes) and the M Aerodynamics Package (S715A=Yes). It installs directly onto the original mounting points, providing the same precise fit, finish and quality as the factory-installed component while ensuring correct operation of the active air flap system.

As a genuine BMW Original Equipment Manufacturer (OEM) component, this lower air duct delivers the precise fit, quality and durability expected from the original manufacturer. It is an excellent choice for maintaining your BMW’s original cooling efficiency, aerodynamic performance and factory-standard build quality.

Part 51745A25891 is identified as number 03 in the diagram.

For vehicles:

• with CO2 equipment S1CBA=Yes
• with M Aerodynamics package S715A=Yes