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

Complete ECU DME set with CAS3 module and key for Mini One R55/R56 with N12 1.4 95 HP petrol engine is a practical solution for workshops and users who need a tested engine control and immobilizer package for the automatic transmission version. The set includes the engine control unit, the CAS3 module, and a matched key, significantly simplifying the restoration of full electronic system functionality after a failure or engine replacement. By maintaining the consistency of the components in one set, you minimize the risk of vehicle starting problems and inter-module communication issues.

Specifications and technical data

• SKU: 7640005-15
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• Substitutable numbers: 7640005, 12147640005, 7589971, 12147589971, 7640001, 12147640001, 0261S04161, 0 261 S04 161, 61359287535, 9287535
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Compatibility of the ECU Set

The presented set is dedicated to Mini One R55/R56 models with the N12 95 HP petrol engine, equipped with an automatic transmission. Combining the DME control unit, CAS3 module, and key from the same vehicle ensures data consistency, which in practice reduces the need for complex immobilizer programming and module synchronization.

This type of solution is particularly useful for:

• replacing a damaged engine control unit after an electrical failure or flooding,
• swapping the engine unit within the same generation of Mini,
• CAS–DME communication problems and start-blocking errors.

Benefits of Using a Complete DME + CAS3 + Key Set

Using a complete control package instead of individual modules helps reduce diagnostic time and the risk of software incompatibility. Interacting control elements facilitate vehicle startup after installation and proper operation of security functions. For a workshop, this means faster service completion, and for the user – lower costs for additional programming.

The main advantages of this solution include:

• maintained immobilizer data consistency between DME, CAS3, and the key,
• reduced interference with the vehicle's electrical system,
• the ability to efficiently restore starting and engine control functions in a Mini.

Technical Characteristics Regarding the Powertrain

The set has been prepared for a petrol engine, which is crucial for proper control of injection, ignition, and engine ancillary operation. The DME control unit software is adapted to the characteristics of the N12 1.4 95 HP engine, allowing the powertrain management system to work with factory sensors and actuators.

The adaptation to the automatic transmission is also important, as the control unit configuration takes into account cooperation with the transmission control module, gear shifting logic, and vehicle network communication. In practice, this means the set is intended for vehicles that originally came with an automatic transmission, and its use in other configurations would require advanced software modifications.

Condition, Verification, and Workshop Application

The components included in the set are from disassembly and are classified as used OEM Mini parts. This type of electronics, when operated correctly, retains full functionality and offers a cost-effective alternative to new parts, especially for older vehicle generations. Before installation, a standard verification of the vehicle's electrical system is recommended to rule out the original cause of the previous control unit's damage.

For workshops specializing in the Mini brand and independent automotive electronics services, such a set is a convenient tool for quickly repairing a vehicle that has experienced engine control unit damage or immobilizer issues.

Technical Support and Selection of Used Electronics

When working with used control units and security modules, correct matching by OEM numbers and hardware/software versions is crucial. These topics are discussed in more detail in the Global Parts guide – Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?, where you will find practical tips on selection, installation, and common service questions.

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