BMW 3 Series E90 E91 E92 N52N 325i 218HP ECU Kit DME CAS3 + Key 7577068 Manual

BMW 3 Series E90 E91 E92 N52N 325i 218HP ECU Kit DME CAS3 + Key is a complete engine control and immobilizer kit designed for 3 Series models with the N52N 325i engine and manual transmission. The set includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates restoring the electronic system's functionality without the need for complex programming from scratch. It is a practical solution for workshops and users looking for a consistent, factory-spec engine electronics package.

Specifications and technical data

• SKU: 7577068
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7577068
• Substitutable numbers: 12147577068, 7577068, 12147581123, 7581123, 5WK90190 12147581124, 7581124, 61356943834, 6943834
• Gearbox type: Manual
• Category: Control Modules

Application and compatibility

The presented ECU kit is intended for BMW 3 Series E90, E91, and E92 vehicles with the N52N 325i engine, equipped with a manual transmission. Combining the DME controller with the CAS3 module and key ensures the consistency of immobilizer data, which significantly reduces the risk of software conflicts during installation. This type of set is particularly useful when replacing a damaged engine controller or during repairs following major electrical system failures.

Kit composition and component functions

The kit belongs to the Computers and Controllers category and includes key components responsible for managing engine operation and starting authorization. The DME controller is responsible for precise control of engine operating parameters, such as fuel dosage and ignition timing, while the CAS3 module integrates immobilizer functions and key handling. The included key is synchronized with the CAS3 module, which facilitates starting the vehicle after correct installation and adaptation in the vehicle.

Benefits of using a complete ECU kit

Choosing a complete engine controller kit with a CAS3 module and key allows for reduced diagnostic and programming time compared to replacing individual components. For workshops, this means more efficient service delivery, and for the end user – a faster return of the car to full functionality. Component consistency in one package minimizes the risk of electronics matching issues, which is particularly important in modern BMW vehicles, where communication between modules takes place over an extensive data bus.

Product condition and practical aspects

The items included in the kit come from a used vehicle, making them an attractive cost-effective alternative to new OEM components. For many users and service centers, this is a reasonable compromise between price and functionality, especially when repairing older generations of the 3 Series. A used ECU kit allows for restoring full functionality of the engine control system while maintaining the factory logic of the systems.

Technical support and electronics selection

If you want to better understand when choosing a used engine controller or comfort module is cost-effective and safe, it is worth checking out the guide describing the second life of automotive electronics – you can find practical tips in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as engine controllers, body modules, or comfort controllers, check out the available parts in the BMW Computers and Controllers category.