Audi A3 8P 2.0 TDI CFGB 170HP Diesel Engine Control ECU 03L906018AK Automatic

Audi A3 8P 2.0 TDI CFGB 170HP Diesel Engine Control ECU Automatic is a factory-made electronic control module designed for precise management of the powertrain. It is responsible for controlling fuel injection, turbocharging, and engine operating parameters, ensuring stable power characteristics and proper cooperation with the automatic transmission. By maintaining OEM specifications, this electronic engine control unit allows for the restoration of proper drivetrain operation after a failure or unit replacement.

Specifications and technical data

• SKU: 03L906018AK
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L906018AK
• Substitutable numbers: 03L906018AK, 03L 906 018 AK, 03L906018AG, 03L 906 018 AG, 0281016399, 0 281 016 399
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The presented module belongs to the Electronic control modules and ECUs category and is dedicated to the diesel engine in the Audi A3 8P with the 2.0 TDI CFGB 170HP unit, working in conjunction with an automatic transmission. The ECU manages key engine operating parameters, such as fuel dosage, boost pressure, and injection corrections, which translates into engine refinement, dynamics, and fuel consumption. Proper software and configuration enable correct communication with other vehicle modules, including the transmission system.

Benefits of using an original Audi module

Using an original Audi ECU ensures:

• preservation of factory diesel engine operating parameters,
• proper cooperation with the automatic transmission,
• compatibility with the vehicle's electrical installation and CAN network,
• possibility of adaptation and coding according to service procedures.

For the user, this means stable engine starting, predictable throttle response, and consistent operation of driver assistance systems. Selecting an ECU compatible with the engine code and transmission type minimizes the risk of communication errors and diagnostic issues.

Technical characteristics and compatibility

The ECU is designed to work with a diesel engine, which means it is adapted to the specifics of direct injection, higher operating pressures, and emission requirements typical of TDI units. The module's design accounts for cooperation with an automatic transmission, enabling the exchange of information regarding load, torque, and current gear. In practice, this translates into smoother gear shifts and better adjustment of engine characteristics to the driving style.

Before installation, it is recommended to verify compatibility via the OEM number or the vehicle's VIN and to plan the adaptation procedure in the vehicle. A correctly selected engine control unit facilitates subsequent service maintenance and computer diagnostics.

Condition, installation, and practical application

The offered module is a used part, which allows for an economical repair of the engine control system while maintaining the manufacturer's original specifications. Before installation, it is worth having a specialist check the electrical installation, grounds, and connectors to avoid the recurrence of faults resulting from wiring damage. After physically installing the ECU, it is necessary to perform appropriate diagnostic procedures, coding, and potential adaptation to the specific Audi A3 8P vehicle.

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 engine ECUs, comfort modules, or transmission control units, check the available parts in the Audi electronic control modules and ECUs category.

Technical support and part selection

When selecting an engine ECU, it is particularly important to match it to the specific version of the powertrain and the vehicle's equipment configuration. It is worth using service documentation and diagnostic tools to correctly carry out the replacement process. Additional tips on working with electronic control modules, adaptation procedures, and the importance of original parts can be found in our blog article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?

For Audi brand enthusiasts who want to better understand the specifics of powertrains and the selection of used OEM components by reference numbers, the following entry may also be helpful: The five-cylinder Audi engine – a legend from Quattro to RS3 and how to take care of it using original Audi parts.