The product is a 2012-2016 Chevrolet Sonic 1.4L Engine Control Module ECU ECM PCU with the part number 12656958. It is a direct replacement with an unspecified length manufacturer warranty. No mounting hardware is included, and it is not a modified item. The product is compatible with various models and years of Chevrolet Sonic vehicles, making it a suitable choice for those in need of a reliable ECM for their vehicle.