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

The Audi S4 B8 3.0 TFSI 333HP CAKA Quattro Engine Module Kit 8K0907551 Automatic is a complete, used engine control unit kit designed for the gasoline-powered Quattro version with an automatic transmission. This component from the Electronic Control Modules and Units group ensures proper engine operation, precise parameter management, and stable communication with other vehicle systems. It's a solution for users seeking a proven OEM module tailored to the specifics of the powerful 3.0 TFSI engine.

Specifications and technical data

• SKU: 8K0907551-2
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K0907551
• Substitutable numbers: 8K0907551, 8K0 907 551, 5WP46405, 8K0905852D, 8K0 905 852 D, 8K0909131C, 8K0 909 131 C
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Purpose and Technical Characteristics

The presented engine module is dedicated to the Audi S4 B8 generation powertrain with a 3.0 TFSI gasoline engine producing 333 HP, designated CAKA, and Quattro all-wheel drive coupled with an automatic transmission. The controller is responsible for advanced management of the combustion process, boost pressure, fuel delivery, and synchronization with the automatic gearbox, which translates to smooth acceleration and predictable throttle response. Thanks to its factory OEM architecture, full integration with the vehicle's communication bus and safety systems is maintained.

Module Functions and Benefits of Installation

The engine module in this Audi model plays a crucial role in controlling the 3.0 TFSI unit, monitoring parameters such as ignition timing, boost pressure, fuel injection, and coordination with the four-wheel drive system. In conjunction with the automatic transmission, it enables optimal gear selection, improving dynamics and driving comfort. Using an original controller preserves the factory engine maps, stable RPMs, proper functioning of driver assistance systems, and consistency with the vehicle's electronic equipment. For the user, this means predictable vehicle behavior and reduced risk of compatibility issues.

Application in Gasoline Engines and Automatic Transmissions

In 3.0 TFSI gasoline engines, the controller must precisely manage the fuel-air mixture and ignition system to ensure adequate power while maintaining smooth operation. The version designed for automatic transmissions is additionally configured to work with the transmission's mechatronics, which affects:

• smooth gear changes during dynamic acceleration,
• stable RPM maintenance in various driving modes,
• consistent operation with traction control and Quattro systems.

As a result, the engine module is a vital component of the entire powertrain, especially in higher-powered vehicles where control precision directly impacts component durability.

Condition, Origin, and Installation Aspects

The offered kit is a used part, sourced from disassembly, allowing for economical vehicle repair while maintaining original manufacturer specifications. Choosing an OEM controller from the same engine and transmission configuration minimizes the need for installation modifications and simplifies the adaptation process in the vehicle. It is recommended that the installation and any necessary coding of the module be performed by a workshop experienced with Audi electronics to ensure proper integration with the rest of the systems and minimize the risk of communication errors.

Expanding Knowledge on Electronic Modules

If you want to better understand how advanced engine controllers and other electronic modules work in modern premium cars, it's worth exploring expert materials. A practical discussion on diagnostics, repairs, and the use of salvaged parts in the context of multimedia systems and controllers can be found in the article on operating iDrive systems and electronic modules in BMW 3 and 5 Series, which helps to better understand the general principles of operation of similar systems across different brands.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other parts from the same group, such as controllers, engine management modules, or electronic systems cooperating with the drivetrain, check the available parts in the Audi Electronic Control Modules and Units category.