Seat Ateca 2.0 TDI DFFA 150HP Engine ECU Kit BCM Key 04L907309P Automatic

Engine Control Unit for Audi A3 8V 2.0 TDI DFGA 150HP for Automatic Transmission is a factory module from the Electronic Control Units and Controllers group, designed for precise management of the diesel engine's operation. This used ECU is a solution that allows for efficient repair of the powertrain while maintaining the original Audi electronics architecture.

Specifications and technical data

• SKU: 04L907309P-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L907309P
• Substitutable numbers: 04L907309P, 04L 907 309 P, 0281031483, 0 281 031 483
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

ECU Purpose and Function

The presented control unit is dedicated to the 2.0 TDI 150 HP engine in the Audi A3 8V model with an automatic transmission. The ECU module is responsible for precise fuel injection control, boost pressure management, engine auxiliary component operation, and coordination with the automatic transmission, ensuring stable torque characteristics and proper response to load. A correctly selected engine control unit is crucial for maintaining proper diesel engine operation, correct starting, smooth idling, and compliance with factory maps for Diesel powertrains.

Compatibility and Selection by Parameters

The module should always be selected based on vehicle data and manufacturer markings, considering the engine version, transmission type, and equipment configuration. In practice, this means verifying hardware and software compatibility with your specific Audi A3 8V to maintain full functionality of the onboard systems. As the control unit comes from the same engine family, it is possible to maintain consistent communication with the CAN network, comfort modules, safety systems, and transmission automation, which reduces the risk of errors and incompatibilities after installation.

Operation Characteristics in Diesel Engines

In Diesel engines, the ECU is responsible for:

• managing fuel injection quantity and timing based on load and engine speed,
• coordinating the operation of the turbocharging and exhaust gas recirculation systems,
• interfacing with pressure, temperature, crankshaft, and camshaft position sensors,
• integrating with traction control and stability control systems. The version designed for automatic transmissions is additionally adapted for seamless data exchange with the transmission control module, which affects the quality of gear changes, kick-down response, and overall vehicle dynamics.

Condition, Verification, and Service Application

The offered control unit is a used part from disassembly, allowing for an economical repair of the powertrain while maintaining the original Audi specifications. Before installation, diagnostic procedures are recommended, along with potential software adaptation and immobilizer matching according to the specific vehicle's service procedure. This solution is particularly beneficial in cases of engine electronics failure, vehicle network communication problems, or the need to replace a damaged module after an unsuccessful repair attempt.

Technical Support and Selection of Used Electronics

If you want to better understand how to safely select and install a used engine control unit or other electronic modules, it is worth consulting the practical guide from Global Parts. Detailed information on selection by VIN/OEM, hardware and software compatibility, and common service questions can be found in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?. 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 engine control units, transmission control modules, or other ECUs, check the available parts in the Audi Electronic Control Units and Controllers category.