Engine Control Units (ECUs), found within the Electrical & Lighting > Control Units category, are critical components in modern passenger cars and commercial vehicles. The ECU functions as the central control system for the engine, managing fuel injection, ignition timing, idle speed, and emissions control to optimize performance and efficiency. Typically located in the engine compartment, the ECU receives data from numerous sensors throughout the vehicle and adjusts engine parameters accordingly. These units are vehicle-specific and often require programming to match the vehicle's VIN. Examples of ECUs we carry include units for MAN trucks, such as MPN 81274216052 and 81619906127, as well as Scania ECUs like MPN 1774004. Maintaining a properly functioning ECU is essential for smooth engine operation, fuel economy, and compliance with emissions regulations.