Air Duct with Air Flap Control, Lower

The genuine BMW Lower Air Duct with Air Flap Control (51745A22C64) is compatible with BMW 2 Series G42 Coupé (2020 onwards), BMW 3 Series G20 Saloon (2017–2022), BMW 3 Series G20 Saloon LCI (2021 onwards), BMW 3 Series G21 Touring (2018–2022), BMW 3 Series G21 Touring LCI (2021 onwards) and BMW 3 Series G28 Saloon (2018–2022).

This genuine BMW OEM lower air duct forms part of the active air flap cooling system, helping to direct airflow efficiently through the front cooling assembly. By managing airflow to the radiator and surrounding cooling components, it contributes to effective engine cooling, improved aerodynamic efficiency and reliable performance in everyday driving.

Part number 51745A22C64 has been fitted to compatible vehicles from November 2020 onwards and supersedes part number 51749465186. This version is intended for vehicles equipped with CO₂ Equipment (S1CBA=Yes) and without the M Aerodynamics Package (S715A=No). As a genuine BMW OEM component, it provides the precise fit, finish and long-lasting durability expected from the original manufacturer while installing directly onto the original mounting points.

Part 51745A22C64 is identified as number 03 in the diagram.

For vehicles:

• with CO2 equipment S1CBA=Yes
• with M Aerodynamics package S1CBA=No