The product is a 2003 Toyota RAV4 2.0 M/T Engine Control Module (ECM) with the manufacturer part number 89661-42870. This ECM is designed specifically for the 1AZ-FE engine and requires programming to function properly. It is a crucial part for controlling the engine and ensuring optimal performance. This module is a genuine Toyota part and is a reliable choice for those looking to replace or upgrade their vehicle's ECM.