Audi S8 D3 5.2 FSI 450HP BSM Quattro Engine Unit ECU 4E0910552G Automatic

Audi S8 D3 5.2 FSI 450HP BSM Quattro Engine Unit ECU is a specialized component from the Electronic control modules and controllers group, designed for precise management of the powertrain in the Audi sports sedan. This controller is responsible for the advanced management of the gasoline engine parameters in conjunction with the automatic transmission, which is crucial for performance, refinement, and drivetrain safety.

Specifications and technical data

• SKU: 4E0910552G
• Mark: Audi
• Condition: Used
• OEM Part Number: 4E0910552G
• Substitutable numbers: 4E0910552G, 4E0 910 552 G, 0261S02578, 0 261 S02 578
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented engine computer has been developed for the Audi S8 D3 generation model with the 5.2 FSI 450HP engine and Quattro drive. Its task is to coordinate all key combustion processes in the gasoline engine, including fuel injection control, ignition timing, and communication with the automatic transmission. As a result, the drivetrain maintains the dynamics, smooth acceleration, and operational stability under full load characteristic of Audi.

The controller belongs to the Electronic control modules and controllers group, meaning it is a central element that communicates with other modules in the vehicle, such as safety systems, traction control, or comfort modules. A correctly selected and configured engine computer ensures the consistency of the vehicle's entire electronic architecture.

Benefits of using an original controller

In the case of such an advanced design as the Audi S8 D3, using the correct engine controller has a direct impact on:

• Stability of the 5.2 FSI unit – proper control maps and logic tailored to the specific Quattro drivetrain configuration.
• Correct cooperation with the automatic transmission – smooth gear shifts, predictable throttle response, and performance in line with factory specifications.
• Consistency with safety systems – proper communication with other electronic modules in the vehicle.
• Maintaining the S8 character – preserving factory dynamics, throttle response, and driving comfort.

For users who value the original characteristics of the car, it is particularly important that a dedicated engine controller helps avoid problems typical of improperly selected replacements, such as communication errors, power limitations, or unstable operation under various loads.

Technical characteristics in the context of the drivetrain

The FSI gasoline engine in the Audi S8 D3 requires precise control of injection and ignition, as well as continuous parameter adjustment depending on load, temperature, and operating conditions. The engine computer works with numerous sensors and the automatic transmission to:

• maintain the optimal air-fuel mixture,
• adjust ignition timing to current conditions,
• coordinate engine torque with gear shift logic,
• respond to signals from traction control and electronic stability systems.

This makes it possible to maintain high power and flexibility while ensuring proper refinement and protection of mechanical components. The correct controller is therefore a key element for long-term, predictable vehicle operation.

Condition, selection, and integration with the vehicle

The offered item is in used condition, which in practice means it has been dismantled from a vehicle and can be an attractive cost-effective solution while maintaining the original specification. In the case of such a complex module as an engine computer, correct selection based on the part number and vehicle configuration is essential for the proper operation of the entire drivetrain. Before installation, it is recommended to verify compatibility with the specific version of the Audi S8 D3 and prepare for potential adaptation or coding in the vehicle.

Professional installation and configuration allow for fully utilizing the controller's capabilities, ensuring consistency with the existing electrical installation and other electronic modules. This solution is particularly recommended for repairs where the goal is to restore factory engine and transmission performance parameters.

Technical support and related components

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as controllers, powertrain management modules, or control systems, check the available parts in the Audi Electronic control modules and controllers category.

To better understand how original electronic modules affect the car's behavior and how used components can help maintain the brand's character, it is worth reading the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which discusses the practical aspects of selecting and operating original Audi components.