Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine ECU Kit 8K0907551 Automatic

Audi S4 B8 3.0 TFSI 333HP Quattro Engine Control Unit ECU Automatic Transmission is a factory module from the Electronic Control Modules and Controllers group, designed to work with the 3.0 TFSI gasoline engine and a drivetrain paired with an automatic transmission. It is responsible for precise engine management, ensuring stable parameters, correct fuel delivery, and proper integration with the drivetrain.

Specifications and technical data

• SKU: 8K0907551-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0907551
• Substitutable numbers: 8K0907551, 8K0 907 551, 5WP46406, 8K0909131C, 8K0 909 131 C
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Controller

The Engine Control Unit (ECU) in this Audi model is designed to manage the powerful 3.0 TFSI gasoline engine in the S4 version with Quattro all-wheel drive and an automatic transmission. The module coordinates key engine operating parameters such as injection timing, ignition angle, and interaction with safety systems, which translates into dynamic yet predictable driving characteristics.

Thanks to dedicated software for the automatic transmission, the controller ensures seamless communication with other vehicle systems, which is crucial for both daily driving and more demanding, sporty use. This solution allows for maintaining the factory performance characteristics of the powertrain without the need for additional modifications.

Benefits of Using an Original ECU

Using an original controller from this series ensures compatibility with the factory electrical and electronic architecture of the Audi S4 B8. For workshops and users, this means:

• maintaining engine operating parameters as specified by the manufacturer,
• correct interaction with the vehicle's diagnostic systems,
• the possibility of configuration and adaptation according to Audi service procedures,
• reducing the risk of communication errors within the vehicle network.

For the 3.0 TFSI engine, stable operation under load is particularly important, so using the correct controller directly impacts the smoothness of operation, throttle response, and predictable vehicle behavior across the entire RPM range.

Application in Vehicles with Automatic Transmission

The presented ECU is designed for configuration with an automatic transmission, which is important for proper data exchange between the engine and the gearbox. The module takes into account the specifics of gear changes, torque, and Quattro drive strategies, ensuring the car maintains consistent, predictable responses in various driving modes.

The correct selection of a controller for an automatic version is crucial to avoid issues such as incorrect gear shifting, communication errors with the transmission module, or power limitations resulting from software incompatibility. This type of ECU is designed precisely for such drivetrain configurations.

Professional Selection and Installation of the Controller

When selecting an engine controller for the Audi S4 B8, it is important to pay attention to compatibility with the specific vehicle equipment and software version. Computer diagnostics and parameter verification based on manufacturer data are recommended, which facilitates subsequent adaptation and coding in the vehicle.

For users and workshops who want to deepen their knowledge on selecting used electronic modules, hardware and software compatibility, and proper installation, a practical guide has been prepared: Used Automotive Electronics – Second-Hand ECUs and Sensors. This is a helpful source of information when planning a controller replacement in modern vehicles.

Expanding the Control System in Audi

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as control modules, auxiliary controllers, or additional management units, check the available parts in the category Audi Electronic Control Modules and Controllers.

When purchasing used electronic components online, it is also worth paying attention to seller verification procedures, the possibility of checking compatibility based on vehicle data, and rules for secure transactions – this is described in more detail in the guide: Secure Online Purchase of Used Car Parts.