Mini One R55 R56 N12 1.4 95HP Petrol ECU Kit DME 7640005 CAS3 + Key Automatic

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mini One R55 R56 N12 1.4 95HP Petrol ECU Kit DME CAS3 + Key Automatic is a complete electronic set including the engine control unit, CAS3 module, and key, designed for Mini vehicles with a petrol engine and automatic transmission. The set belongs to the Electronic control modules and ECUs category, which ensures consistent communication between the powertrain and other vehicle systems. It is a practical solution for workshops and users who want to restore full functionality to the engine control system while maintaining compatibility with the factory Mini electronics architecture.

Specifications and technical data

• SKU: 7640005-7
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• Substitutable numbers: 12147589971, 7589971, 12147640005, 7640005, 12147640001, 7640001, 12147589972, 7589972, 0261S04161, 0 261 S04 161, 61359147196, 9147196
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit kit

The presented kit combines the computer controlling the powertrain, the CAS3 module responsible for start authorization, and a matched key. This configuration allows for the efficient transfer of the complete control system to another Mini One R56 with a petrol engine and automatic transmission, minimizing the risk of issues with the immobilizer or component synchronization.

In practice, this means that after proper installation and adaptation in the vehicle, the system manages, among other things, fuel injection, ignition, and communication with other onboard modules, maintaining operating parameters consistent with the manufacturer's factory specifications. The kit is particularly useful when replacing a damaged ECU or resolving vehicle starting problems resulting from electronic failure.

Benefits of using the complete ECU + CAS3 + key kit

Using a complete engine control package with a CAS3 module and key significantly simplifies the electronic system repair process. Instead of selecting individual elements and performing time-consuming matching procedures, you receive a set of components that were already working together. This reduces the risk of software incompatibility, immobilizer errors, and starting problems.

For workshops specializing in the Mini brand, this solution allows for shorter diagnostic and installation times, and for the end user – a chance to efficiently restore proper engine operation without the need for deep interference in the factory installation. Electronic control modules and ECUs in this configuration help maintain the original logic of the vehicle's systems.

Application in vehicles with petrol engines and automatic transmissions

The offered kit has been prepared for petrol units working with an automatic transmission. This means that the control logic takes into account the specific operation of the automatic gearbox, including data exchange between the engine controller and the module responsible for gear shifting. Thanks to this, it is possible to maintain the smoothness of the powertrain and the correct response to loads and the driver's driving style.

Proper matching of the fuel type and transmission type is crucial for the correct operation of the entire system. Using the appropriate controller in combination with the CAS3 module and key allows you to avoid software conflicts and limits the need for vehicle configuration modifications.

Characteristics of the used product

The product comes from dismantling, which means it is a used item, but it retains the functionality required for further operation. For many users and services, this is a reasonable compromise between the cost of repair and maintaining the manufacturer's original electronics. In the case of engine controllers and related modules, the use of verified used components is a frequently practiced method of restoring vehicle efficiency.

Before installation, it is recommended to perform a standard diagnostic procedure and carry out the necessary adaptations in the vehicle, in accordance with service practices for the Mini brand. This ensures that the kit will work correctly with other modules and the car's electrical installation.

Expert support and selection of engine electronics

If you want to deepen your knowledge about the operation of engine controllers, comfort modules, and multimedia systems in premium segment vehicles, it is worth reading an article describing the practical aspects of electronics repair in BMW – many diagnostic and installation principles are similar to those used in the Mini brand. You will find useful tips in the material: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using parts from dismantling?

If you are planning a comprehensive repair or upgrade of the engine area in your Mini and need other elements from the same group, such as controllers, powertrain management modules, or systems cooperating with engine electronics, check the available parts in the Mini electronic control modules and ECUs category.