This is a Genuine OEM BMW Active Grille Shutter Flap Control Unit / Air Duct Assembly. This component is responsible for regulating airflow to the engine bay for optimal thermal management and improved aerodynamics (fuel efficiency). It is a direct replacement for various modern BMW models. Part Type: Active Grille Shutter / Air Flap Control Unit. ? Identifiable Part Numbers (Crucial for Fitment). Please match these numbers exactly with the part you are replacing. Number Visible on Part. The primary OEM-style reference number. ? Compatible BMW Models (General Guide). This specific component is widely used across BMW’s G-Series platform. While this is a general guide, you must verify the part number against your old unit or VIN. BMW 3 Series (G20/G21). BMW 5 Series (G30/G31). Match the Numbers: The most reliable way to confirm fitment is by matching the part numbers listed above (especially 9881646-02) with the number found on your existing faulty part. Consult a Professional: If you are unsure, please consult your local BMW dealership or a certified mechanic with your Vehicle Identification Number (VIN) to confirm the correct part number. Visual Confirmation: Please review all included photos carefully to ensure the part you are purchasing matches the part you intend to replace.