Audi A4 B9 8W 35 TFSI DMSB 150 HP Engine ECU Kit Body + Key 06N907309A Automatic

Audi A4 B9 8W 35 TFSI DMSB 150 HP Engine ECU Kit Body + Key is a specialized electronic control unit designed for a petrol engine paired with an automatic transmission. This component from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable performance and consistency with the factory architecture of the Audi vehicle. By maintaining the original specifications, it is a particularly beneficial solution for professional ECU repair or replacement.

Specifications and technical data

• SKU: 06N907309A-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 06N907309A
• Substitutable numbers: 06N907309A, 06N 907 309 A, 8W1907064DN, 8W1 907 064 DN
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented engine computer is dedicated to the Audi A4 B9 generation (body designation 8W) in the 35 TFSI DMSB 150 HP version, featuring a petrol engine and an automatic transmission. The controller is responsible for coordinating key engine operating parameters, such as fuel injection, ignition timing, and interaction with auxiliary systems, which translates into predictable power characteristics and proper engine refinement.

By maintaining the original software architecture, the ECU remains consistent with Audi's factory onboard systems, which is essential for both engine stability and proper communication with other electronic modules in the vehicle.

Compatibility with petrol systems and automatic transmissions

The controller has been designed to work with a petrol-powered unit, which means it features appropriately calibrated injection maps, ignition timing, and engine protection strategies. Integrated support for the automatic transmission allows for correct data exchange between the ECU and the transmission module, which is crucial for smooth gear shifting, throttle response, and overall driving comfort.

Such matching is particularly important when replacing a controller in modern Audi designs, where the engine, transmission, and other modules form a single coherent system communicating via a digital bus.

Application in professional diagnostics and repair

As an item from the Electronic control modules and controllers category, this engine computer is intended for service applications, including replacing a damaged ECU or restoring full powertrain functionality after a failure. In workshop practice, it enables:

• restoration of factory engine control logic in the Audi A4 B9 35 TFSI,
• maintenance of compatibility with the existing electrical installation and safety systems,
• proper cooperation with diagnostic tools designed for the Audi brand.

As a result, it is a valuable component for repairs where maintaining the original character of the engine and compliance with the manufacturer's factory standards is key.

Characteristics of the used product

The offered controller is a used part, which in service practice often represents a cost-effective solution while maintaining the manufacturer's original specifications. Such modules, sourced from dismantling, are frequently used in professional workshops specializing in the Audi brand, especially where maintaining compatibility with the vehicle's factory electronics is a priority.

Before installation, it is recommended to perform a full diagnostic check and – if necessary – appropriate adaptation or programming in accordance with Audi service procedures to ensure proper cooperation with the immobilizer and other vehicle systems.

Expanding knowledge about Audi parts and related categories

To better understand how original electronic modules, such as engine computers, affect vehicle performance, it is worth consulting expert material. This topic is discussed in more detail in the article: Audi and pure emotion – how used parts help maintain the brand's DNA, which describes how original components, including controllers and multimedia modules, help preserve the characteristic properties of Audi vehicles.

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 engine controllers, powertrain management modules, or other control systems, check the available parts in the Audi electronic control modules and controllers category.