This product is a Genuine BMW Air Duct Displ.Engine Oil Cooler designed for use on the right side of vehicles with an M Package. It has a part number of 51748057205. This air duct is specifically designed to work with the engine oil cooler and helps to direct air flow to keep the oil cool and prevent overheating. It is a high-quality OEM part made by BMW and is suitable for use on various BMW models.