The product is a Hitachi Engine Control Module (ECM) designed for the 1987-1988 Suzuki Samurai SJ413. It is a vintage part with a manufacturer part number of 33920-83021, and may require reprogramming. The ECM features a 1.3L engine computer with 4 terminals, operates on a 25A maximum amperage, and weighs 1 lb. Made of aluminum and plastic, this screw-in, bolt-on module is interchangeable with part number 590-54865 and originates from Japan. With a mileage of 75,000-100,000 miles, this ECM is a vital component for ensuring optimal performance of the vehicle's engine control system.