This is a fully tested working unit. But it is up to you to make sure you are purchasing the correct one. The only way to be 100% is to match the part number (which is listed in the Title, Item Specifics, and can be found in the pictures). Many if not MOST computers need to be programmed to your vehicle in order to synchronize to the other modules in the vehicle. We offer the option to our customers to not only supply them with the computer but we can also CLONE their original data over to the replacement.That way when you receive the item you can just plug it in and go. No tow to the mechanic/dealership, no extra codes showing up, no need for the eternal changing scanners. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts & Accessories\Starters, Alternators, ECUs & Wiring\ECUs & Computer Modules". The seller is "instrumentclusterstore" and is located in this country: US. This item can be shipped to United States.