Audi Q2 GA 35 TFSI 1.5 DXDB Engine ECU Kit Ignition + Key 05E907309CB Manual

The Audi Q2 GA 35 TFSI 1.5 DXDB Engine Computer 05E907309CB Ignition Switch Key is a complete set from the Electronic Control Units and Controllers group, designed for vehicles with a gasoline engine and manual transmission. The set includes the engine control unit along with ignition switch components and a key, which facilitates matching in terms of immobilizer electronics and vehicle configuration.

Specifications and technical data

• SKU: 05E907309CB
• Mark: Audi
• Condition: Used
• OEM Part Number: 05E907309CB
• Substitutable numbers: 05E907309CB, 05E 907 309 CB, 5Q1905865A
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and Compatibility

The presented set has been developed for the Audi Q2 GA 35 TFSI 1.5 model with the DXDB engine designation, operating on gasoline and paired with a manual transmission. Integrating the engine computer with the ignition switch and key ensures consistency of the security system, which is crucial when replacing the ECU in modern vehicles.

This type of solution is particularly useful in situations where the existing control unit has suffered electronic damage, there are communication problems on the bus, or errors occur that prevent the proper startup of the powertrain.

ECU + Ignition Switch + Key Set Features

The set combines several key elements of the control and start authorization system, significantly simplifying the installation and configuration process in the vehicle:

• engine computer responsible for controlling the gasoline unit's operation,
• ignition switch compatible with the factory security system,
• key matched to the control module used.

This combination limits the need for deep intervention in the immobilizer software, which in practice reduces repair time and the risk of adaptation problems.

Application in the Powertrain System

In vehicles with a gasoline engine and manual transmission, the engine control unit is responsible for precise management of fuel injection, ignition, and cooperation with other onboard modules. A properly selected ECU:

• supports stable operation of the powertrain across the full range of loads,
• enables correct communication with diagnostic systems,
• ensures compliance with the vehicle's factory equipment configuration.

Thanks to this, replacing a damaged control unit with a suitable set from the same construction group allows for the restoration of correct engine operating parameters without the need for costly installation modifications.

Condition, Origin, and Benefits of Choosing a Used Module

The offered set comes from an Audi vehicle and is an original part, which helps maintain the factory operating parameters of the powertrain. A used ECU module with an ignition switch and key is an attractive cost-effective alternative to new components, while maintaining structural and software compatibility within the specific model.

If you want to better understand how to safely select engine control units and other onboard electronics from the aftermarket, it is worth reading the Global Parts guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?

Additionally, when deciding between new and used components, it may be helpful to compare costs and durability as described in the article New or Used? Comparing the Cost and Quality of Car Parts.

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 parts from the same group, such as additional control units, auxiliary modules, or related electronic systems, check the available parts in the Audi Electronic Control Units and Controllers category.