The Genuine BMW Differential Drive Pinion Oil Deflector (part number 33127518511) is a component designed to protect the differential drive pinion from oil leaks. It is made by BMW and is a genuine OEM part. The oil deflector is responsible for redirecting oil away from the drive pinion, preventing it from getting damaged or contaminated. This product is specifically designed for use in BMW vehicles and is made with high-quality materials to ensure durability and reliability. It is an essential component for maintaining the proper functioning of the differential system in a BMW vehicle.