BMW E60 E90 330i 530i N52 258HP Engine ECU Kit DME 7561684 CAS2 Key Automatic

BMW E60 E90 330i 530i N52 258HP Engine ECU Kit DME 7561684 CAS2 Key Automatic is a complete engine control kit designed for BMW models with the N52 engine producing 258 HP and an automatic transmission. The kit includes the DME control unit, CAS2 module, and a key, facilitating the maintenance of powertrain electronics consistency. This solution is for users seeking a proven, factory engine control system that ensures precise engine operation and correct integration with the automatic gearbox.

Specifications and technical data

• SKU: 7561684-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7561684
• Substitutable numbers: 12147577970, 7577970, 12147561684, 7561684, 5WK98084, 61356943797, 6943791
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the ECU Kit

The presented kit belongs to the Electronic Control Modules and Units category and is configured for the N52 258 HP gasoline engine in the 330i and 530i versions. The combination of the DME control unit with the CAS2 module and a matched key ensures the integrity of the immobilizer system, which is crucial when replacing engine electronics in modern BMWs.

A complete kit of this type is particularly useful for:

• replacing a damaged engine control unit after an electrical or mechanical failure,
• swapping powertrains between compatible models,
• resolving communication issues between the DME, CAS2, and the key.

Benefits of Using a Complete DME + CAS2 + Key Kit

Using a complete ECU kit with the CAS2 module and key reduces the need for time-consuming matching of individual electronic components. Component consistency simplifies the work for electricians and diagnosticians, and also minimizes the risk of software conflicts within the vehicle's bus system.

The main advantages of such a solution include:

• Internal Compatibility – the engine control unit, comfort/immobilizer module, and key come from a single system, simplifying adaptation in the car.
• The ability to maintain the full functionality of factory security features while restoring the powertrain's operability.
• Reduced programming costs compared to sourcing individual modules from different suppliers.

Integration with Automatic Transmission

The kit is prepared for cooperation with an automatic transmission, which is important for correct communication between the engine control unit and the transmission control module. A properly selected DME for an automatic version influences:

• smooth gear changes under various engine loads,
• stable idle RPM in D/R driving modes,
• correct operation of comfort functions related to the transmission.

This makes the kit suitable for users who want to restore the full functionality of the powertrain in their BMW 3 Series E90 or 5 Series E60 with an automatic transmission.

Product Characteristics and Practical Application

The offered ECU kit is an element of original BMW electronics, which promotes the maintenance of the N52 engine's factory operating characteristics. The kit is applicable for both routine repairs and more advanced projects, such as engine swaps within the same engine family.

In practice, this means that a workshop or a private user receives:

• a kit ready for further configuration for a specific vehicle instance,
• a basis for restoring the engine's serial operating parameters,
• the possibility of diagnostics and potential tuning based on factory solutions.

Condition and Usability Aspect

The product is used, which in the case of BMW electronics often represents a sensible compromise between cost and functionality. Modules of this type, sourced from dismantling, allow for economical vehicle repair while maintaining the original electrical architecture. Before installation, a standard diagnostic procedure and configuration for the specific car at a specialized service center are recommended.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as control units, comfort modules, or powertrain management systems, check the available parts in the BMW Electronic Control Modules and Units category.

For a comparison of how premium manufacturers approach maintaining a car's character and the role of original control modules in brands like Audi, it is worth reading the article Audi and Pure Emotion – How Used Parts Help Maintain the Brand's DNA, which shows how important factory electronic components are for preserving driving characteristics and comfort.