Engine control module from a 2005 Cadillac STS. This was carefully removed from a vehicle that ran well with no check engine light on and has been tested off-car to ensure proper communication. The case and connectors have no broken parts. The images are of the actual item you will receive. This item will require on-car programming, coding or flashing during installation in order to work with your vehicle. Please confirm that you or your repair facility can perform this procedure before making your purchase.Fits 2005-2007 Cadillac STS with 3.6L V6 engine and part number 12585814 ONLY. This will be listed as the “SERVICE NO:” on the part label. All other numbers on the part label are irrelevant.