This product is the left-side brake air duct for BMW 1 Series F20 and F21 models. It directs cool air to the brake system, helping to improve brake cooling. Designed for pre-LCI Urban, Luxury, and Sport models from 2012 to 2015.
It is not suitable for M Sport or LCI models.
Part 51747245781 is identified as number 03 in the diagram.