This engine control unit (ECU) is a direct replacement for a 2019 Isuzu NPR NQR 6.0L gas engine. It is manufactured by ACDelco and has the part number 12654074. The ECU is located on the rear left side of the vehicle. This product is made in Japan and does not require programming or protection lock. It is a performance part and is not universal. The ECU is responsible for managing the engine's fuel and ignition system to ensure optimal performance.