This is a new power steering pump with a pulley designed for 2000-2006 Mercedes-Benz S430, S500, and S55 AMG models. It is an OE Spec part from Chefull, with manufacturer part number E10401CP311S. The power steering pump is a direct replacement part, featuring compatibility with Mercedes-Benz vehicles and interchange part numbers 21-5326, 24668601, 0034666001, and 5330. This single part comes with a 1-year manufacturer warranty and is a front placement component for the vehicle's steering system. This item is brand new, but the box was messed up. It will be shipped a different way. Item is in perfect condition.