Three year, unlimited mileage warranty! Fully remanufactured and tested OEM / OES unit - highest quality available Guaranteed Exact Fit for easy installation - fits just like OEM, including the same steering ratio as stock! This is only tested and verified to fit on models that had power steering from the factory; we have not tested and verified if it fits as an upgrade for models with manual steering Fits 1997-2003 BMW 540i (chassis code E39)