ACDelco 36P1557 Professional Power Steering Pump, Remanufactured All components are closely inspected and validated to meet the strictest quality standards to improve part durability Multiple cleaning and washing stations, with regular contamination audits, for every component inside the pump minimize internal contamination and increase part service life Housing is cleaned and inspected at multiple stages in the manufacturing process to minimize corrosion and rust prior to component assembly Seals and O-rings are replaced with new parts for extended life and reliability Sealing surfaces are polished, restored, and checked for microfinish. This helps ensure maximum sealing to minimize leaks.