The 4E0910552B ECU in the Audi S8 4E V10 450PS is a sophisticated engine management system designed by Bosch. It falls under the MED 9.x family of engine control units, specifically tailored for high-performance engines like the 5.2L naturally aspirated V10 that powers this luxury sports sedan. The ECU plays a critical role in ensuring that the engine operates at peak performance while meeting emissions regulations and delivering a smooth driving experience.

The ECU is responsible for managing all engine functions, including fuel injection, ignition timing, throttle control, and emissions systems. It uses real-time data from various sensors to make precise calculations, ensuring an optimal balance of power, efficiency, and environmental compliance. The direct fuel injection system (FSI) is controlled by the ECU, enabling precise metering of fuel into the combustion chambers for maximum efficiency and power delivery.

The ECU uses CAN-Bus communication to interact with other vehicle systems, such as the ABS, Transmission Control Unit (TCU), and stability control systems, ensuring a fully integrated driving experience. It is fully OBD-II compliant, allowing technicians to access diagnostic trouble codes (DTCs), monitor live engine data, and perform updates or tuning via Audi diagnostic tools like VCDS or ODIS.

Part Number: 4E0910552B

BSM 5.2L V10, producing 450 PS.

Control Type: Bosch MED 9.x engine management system.

 Real-time control of fuel, ignition, throttle, and emissions systems.

 Supports software updates, calibration changes, and aftermarket tuning for enhanced performance.

Conclusion

The Audi S8 4E V10 ECU (4E0910552B) exemplifies advanced automotive technology, blending high-performance control with luxury driving refinement. By managing every aspect of the engine's operation, this ECU ensures that the V10 delivers its full potential—whether cruising comfortably or accelerating aggressively—while remaining reliable and efficient over time.