The Genuine BMW Air Duct Ornamental Grille Left (M4) - 51138058779 is a replacement part for BMW vehicles. It is designed to fit on the left side of the air duct and serves as an ornamental grille. Made from high-quality materials, this product is durable and designed to match the original specifications of the M4 model. It is an authentic BMW product, ensuring a perfect fit and function. This air duct ornamental grille adds a stylish touch to the vehicle's exterior and helps to improve airflow. It is a genuine BMW part, making it a reliable and high-quality choice for BMW owners.