BMW E60 E90 325i 525i N52 218HP Engine ECU Unit Kit DME 7561684 CAS2 Key Manual

BMW E60 E90 325i 525i N52 218HP Engine ECU Unit Kit DME CAS2 Key Manual is a complete engine control kit for the 218 HP N52 unit, designed for BMW 3 Series E90 and 5 Series E60 models with a manual transmission. The set includes the DME controller along with the CAS2 module and a matched key, which facilitates the restoration of proper powertrain operation and security electronics. This solution is particularly useful when replacing a damaged controller or performing an engine swap within compatible models.

Specifications and technical data

• SKU: 7561684-9
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7561684
• Substitutable numbers: 12147561684, 7561684, 12147573400, 7573400, 12147571824, 7571824, 12147569832, 7569832, 12147565118, 7565118, 12147563060, 7563060, 12147567004, 7567004, 5WK98084, 61356943791, 6943791
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility with the N52 218 HP engine

The presented kit is dedicated to the 218 HP N52 petrol engine used in the BMW 3 Series E90 325i and 5 Series E60 525i. Integrating the DME controller with the CAS2 module and key allows for maintaining the consistency of the immobilizer system and engine start logic, which is crucial when replacing electronics in modern powertrains. With this kit, you can systematically recreate the original engine control configuration, minimizing the risk of vehicle starting issues.

Electronic control modules and controllers – the role of the DME + CAS2 + key kit

As an item from the Electronic control modules and controllers category, this set is responsible for several critical vehicle functions:

• managing engine operation (injection, ignition, protection strategies),
• cooperating with the vehicle security system via the CAS2 module,
• authorizing engine start using the matched key,
• communicating with other controllers in the vehicle network.

Combining these elements into one set reduces the need for additional programming and component matching, which in practice shortens repair time and reduces the risk of incompatibility between the engine controller and the comfort and security systems.

Benefits of using a complete BMW ECU kit

Using a complete ECU kit with a CAS2 module and key in a BMW E60 or E90 offers a number of practical service benefits:

• Immobilizer system consistency – the engine controller, CAS2 module, and key are synchronized, making it easier to restore proper start authorization.
• Reduced need for coding – in many cases, adapting the set to a specific car is sufficient, without the need for full configuration from scratch.
• Support for engine swaps – when changing the powertrain within the N52 family, such a set significantly simplifies electrical work.
• Better diagnostics – a unified control set facilitates error analysis and communication between modules during workshop operations.

Manual transmission compatibility and workshop application

The presented kit is prepared for use with a manual transmission, which is important when selecting a DME controller for a specific vehicle configuration. In workshop practice, such a set is particularly useful in situations involving:

• replacing a damaged engine controller in a BMW with an N52 218 HP engine,
• repairs after unsuccessful software modification attempts,
• restoring the original electronics configuration after a collision or water damage,
• modernization projects within the same generation of powertrains.

The used condition allows for an economical restoration of vehicle performance while maintaining the original BMW electronic architecture.

Selection support and related content

To correctly select an engine controller and related modules, it is worth using manufacturer markings, part numbers, and vehicle data such as model, generation, and transmission type. For more complex modernization projects, it may also be helpful to understand how other systems – such as multimedia or comfort modules – react to the replacement of control electronics. For a comparison of approaches to maintaining the brand's character in the context of original parts, you can read the article Audi and pure emotion – how used parts help maintain the brand's DNA, which highlights the importance of proper component selection in modern cars.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as additional controllers, engine management modules, or related electronic units, check out the available parts in the BMW electronic control modules and controllers category.