The Genuine BMW Differential Carrier Shim Set is a set of shims designed specifically for BMW vehicles. These shims have a thickness of 1.45mm and are used to adjust the position of the differential carrier, which is a component of the vehicle's drivetrain system. The part number for this set is 33139065734. These shims are genuine BMW products, ensuring high quality and compatibility with the vehicle. They are used to achieve proper alignment and clearance in the differential system, helping to improve the overall performance and longevity of the vehicle.