Audi A3 S3 8V 2.0 TFSI CJXC 300HP Quattro Engine ECU Kit 8V0906259F BCM + Key

Audi A3 S3 8V 2.0 TFSI CJXC 300HP Quattro Engine ECU Kit BCM + Key is a complete, used electronic control set designed for a petrol unit with all-wheel drive and an automatic transmission. The set includes the engine ECU module along with the BCM and key, which facilitates matching in terms of the immobilizer and factory configuration. This is a solution for workshops and users looking for a proven, original control module for advanced Audi drivetrain systems.

Specifications and technical data

• SKU: 8V0906259F-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 8V0906259F
• Substitutable numbers: 8V0906259F, 8V0 906 259 F, 06K907425B, 06K 907 425 B, 5Q0937084AS, 5Q0 937 084 AS
• Fuel type: Petrol
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented set belongs to the Electronic control modules and controllers group and is designed to support the 2.0 TFSI petrol engine in the high-output version. The engine controller works with the automatic transmission and Quattro drive, managing injection, ignition, and accessory parameters in a way that is consistent with the vehicle's factory configuration.

The presence of the BCM module and the key in one set makes it easier to maintain the security system's compatibility, which is crucial when replacing electronics in modern Audi models. Thanks to this, the set can serve as a base for repairing or restoring the vehicle's configuration after the failure of the original controller.

Benefits of using an original Audi kit

Using an original ECU kit with BCM and key ensures:

• consistency of the drivetrain operation with factory petrol engine control maps,
• proper cooperation with the automatic transmission and traction systems,
• maintenance of the immobilizer system integrity and convenient vehicle electronics configuration,
• the possibility of professional adaptation in a specialized service center using appropriate diagnostic tools.

For workshops specializing in the Audi brand, such a set is a practical solution that reduces the risk of problems with matching individual modules and speeds up the repair process.

Technical characteristics regarding the drivetrain

The ECU kit has been prepared for use with a petrol engine and an automatic transmission, which is important when selecting the appropriate controller for a specific vehicle configuration. The software and hardware configuration are adapted to the specifics of the high-power 2.0 TFSI unit, typical for the S3 version with Quattro drive.

Before installation, it is recommended to verify compatibility based on OEM and reference numbers and to consult a diagnostician for the proper adaptation of the set to a specific car. This allows avoiding communication discrepancies between the engine controller, BCM, and other modules in the vehicle network.

Practical application and installation tips

This engine controller set with BCM and key will work well both for standard replacement of a faulty ECU and for more complex electronics repairs in Audi A3 / S3 8V generation models. The used set allows for an economical repair while maintaining the original electrical architecture of the vehicle.

Installation in a specialized service center that has the appropriate diagnostic software for module adaptation, coding, and potential software updates is recommended. A properly performed installation minimizes the risk of communication errors in the CAN network and problems with starting the engine.

More information about used electronics and parts

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 controllers, comfort modules, or drivetrain management units, check the available parts in the Audi electronic control modules and controllers category.

When selecting used controllers and sensors, it is worth knowing the rules for checking compatibility by OEM numbers, hardware and software versions, and installation procedures. A detailed discussion of these issues can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

If you want to further optimize service costs while maintaining OEM quality, the article Rising repair costs and the boom in used parts – how to save on car service?, which describes practical strategies for choosing used components, may also be helpful.