BMW Z4 Series E89 Roadster 23i N52N 204HP ECU Kit DME CAS3 Key 7609656 Automatic

BMW Z4 Series E89 Roadster 23i N52N 204HP ECU Kit DME CAS3 Key is a complete engine control and immobilizer kit designed for vehicles equipped with an automatic transmission. The set includes the DME engine control module, the CAS3 module, and a matched key, which facilitates the professional replacement of vehicle control electronics. This solution allows for a consistent, technically correct restoration of the electronic system responsible for starting and operating the power unit.

Specifications and technical data

• SKU: 7609656-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7609656
• Substitutable numbers: 12148613000 5WK91154 61359226238, 8613000 5WK91154 9226238, 12147639564 12147624048 12147614359, 12147605429 12147629052 12147609656, 7639564 7624048 7614359, 7605429 7629052 7609656
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented ECU kit is dedicated to the N52N 204HP petrol engine in the BMW Z4 E89 Roadster model with an automatic transmission. The combination of the DME controller, CAS3 module, and key ensures data consistency within the security system, which is crucial when replacing electronics in modern vehicles. This makes it possible to restore proper communication between the engine controller, the immobilizer system, and the steering column without the need for tedious matching of individual components.

Benefits of using a complete DME + CAS3 + key kit

Using a complete control kit provides a number of practical benefits in the process of repairing or upgrading vehicle electronics:

• data consistency in the security system (DME, CAS3, key),
• reduced risk of starting issues after controller replacement,
• facilitated workshop work when adapting the kit to the vehicle,
• possibility to restore the correct operation of the N52N unit in the factory configuration,
• compatibility with automatic transmission, which is significant for drivetrain control logic.

For workshops specializing in the BMW brand, such a kit serves as a convenient base for further configuration, coding, and potential adaptation to a specific vehicle.

Electronic control modules and controllers in the BMW Z4 E89

In modern BMW models, such as the Z4 E89, electronic control modules and controllers are responsible not only for engine operation but also for integration with comfort, safety, and transmission systems. The DME + CAS3 + key kit is a central element of this architecture – the starting, stability of the power unit, and communication with other controllers in the vehicle depend on the proper cooperation of these modules. Replacing the entire set instead of individual components often shortens diagnostic time and minimizes the number of potential points of failure.

Condition, verification, and practical application

The offered kit comes from a used vehicle, which is a common and economically justified service practice for BMW electronics. Before installation, standard workshop verification and matching the configuration to a specific Z4 E89 vehicle is recommended, in accordance with the manufacturer's procedures and the capabilities of the diagnostic software used. The complete nature of the kit facilitates the work of electricians and diagnosticians, who can focus on proper coding and integration with the rest of the vehicle's systems.

If you are planning a comprehensive repair or upgrade of the engine control electronics in your BMW and need other components from the same group, such as additional controllers, security modules, or drivetrain management systems, check the available parts in the BMW electronic control modules and controllers category.

How to safely choose used automotive electronics

When selecting a used ECU kit for a BMW Z4 E89, it is worth paying attention to compatibility with the engine type, body version, and transmission type, as well as the possibility of correct coding in the vehicle. For users and workshops who want to deepen their knowledge on the safe selection of used engine controllers and comfort modules, a practical guide has been prepared – detailed tips can be found in the article "A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?".