The product is a genuine OEM front differential carrier diff for a 2000-2003 BMW X5 E53 4.4. It has a 3.64 ratio and is designed specifically for the front placement on the vehicle. The part number is 31507508522 and it is compatible with the model X5. Made in Germany, this differential carrier diff is an essential component for the proper functioning of the SUV's drivetrain system. It is a high-quality, specialized part designed by BMW for optimal performance.