Mini Cooper R55 R56 R57 N12 120HP ECU Control Unit Kit DME 7640005 CAS3 Key

Mini Cooper R55 R56 R57 N12 120HP ECU Control Unit Kit DME CAS3 Key is a complete electronic set from the Electronic Control Modules and Controllers category, designed for the engine management system in Mini models equipped with the 120 HP N12 engine. It includes the DME engine control unit, the CAS3 module, and a matched key, which facilitates the professional replacement of the entire control set in the vehicle.

Specifications and technical data

• SKU: 7640005-2
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• Substitutable numbers: 12147589972, 7589972, 12147572264, 7572264, 12147572276, 7572276, 12147572256, 7572256, 12147572260, 7572260, 12147620005, 12147572270, 12147620001, 12147572268, 12147620076, 12147620020, 12147572274, 12147572272, 12147572266, 12147589971, 0261S04161, 61359147195, 9147195
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit kit

The presented control kit is dedicated to Mini Cooper vehicles of the R55, R56, and R57 generations with the 120 HP N12 engine. The set includes an electronic DME engine controller, a CAS3 module responsible for ignition authorization, and a key matched to this system. This combination of components allows for consistent operation of the engine management system, immobilizer, and vehicle start functions. By maintaining the factory electronics architecture, the kit enables the restoration of the original powertrain logic, which promotes stable engine operation, correct fuel metering, and proper communication with other modules in the vehicle.

Benefits of using the complete DME + CAS3 + key kit

Using a complete engine control kit with a CAS3 module and key is particularly beneficial in situations where several electronic system components have been damaged or there are issues with immobilizer synchronization. In one package, you receive:

• a consistent engine management and vehicle security system,
• minimized risk of software conflicts between modules,
• a simplified installation and configuration procedure compared to replacing individual components. This solution is highly valued by workshops specializing in automotive electronics because it allows for reduced diagnostic time and limits the number of potential failure points. The complete control kit also facilitates the restoration of full vehicle functionality after major electrical faults or unsuccessful programming attempts.

Product characteristics and fitment for Mini

The components included in the kit come from the original Mini production line, which means they maintain factory manufacturing standards and compatibility with the vehicle's installation. As a part from the Electronic Control Modules and Controllers category, the set is designed to operate in the demanding environment of the engine bay and to work with the vehicle's communication bus. The DME system is responsible for controlling the N12 engine's operation, including the execution of injection and ignition maps, as well as cooperation with sensors and actuators. The CAS3 module acts as an anti-theft security feature and manages key authorization, which is crucial for proper engine starting and the operation of comfort functions related to ignition.

Condition, origin, and use in service practice

The offered set is a used item sourced from dismantling, making it an attractive cost-effective alternative to new components while maintaining the manufacturer's original specifications. This type of solution is often chosen by professional workshops and informed users who want to restore full engine management system efficiency without exceeding their budget. In workshop practice, the DME + CAS3 + key kit works particularly well for:

• repairs after electronic damage caused by power surges or flooding,
• starting problems resulting from inconsistencies between the engine controller and the CAS module,
• the need to replace the set after unsuccessful programming attempts or software modifications.

Technical support and selection of used electronics

When working with used engine controllers and comfort modules, it is worth knowing the best practices for selecting and installing such components. Practical tips on assessing the condition of electronics, how to match controllers, and minimizing the risk of problems after installation can be found in the article on the second life of automotive electronics and choosing used engine controllers. This is a valuable addition to the knowledge for workshops and users planning to install this type of kit. If you are interested in the broader context of how control modules work in modern cars and want to better understand the relationships between the engine controller and other modules, such as multimedia systems or body modules, the blog post dedicated to iDrive systems and electronics in BMW will also be helpful: a guide to servicing iDrive modules, FRM, and engine controllers using parts from dismantling. If you are planning a comprehensive repair or upgrade of the engine electronics area in your Mini and need other elements from the same group, such as additional controllers, security modules, or engine management systems, check out the available parts in the Mini Electronic Control Modules and Controllers category.