Mini One R55 R56 Petrol N12 1.4 ECU Kit DME 7640004 CAS3 + Key Automatic

Mini One R55 R56 Petrol N12 1.4 ECU Kit DME CAS3 + Key Automatic is a practical solution for workshops and users who want to efficiently restore the full functionality of the powertrain electronics. Thanks to the factory configuration for the petrol unit and automatic transmission, the set allows for consistent cooperation between the engine control unit, immobilizer module, and key, minimizing the risk of vehicle starting issues.

Specifications and technical data

• SKU: 7640004-2
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640004
• Substitutable numbers: 12147589972, 7589972, 12147572264 12147572276 12147572256 12147572260, 7572264 7572276 7572256 7572260, 12147572268 12147620005 12147572270 12147620076, 7572268 7620005 7572270 7620076, 12147620001 12147620020 12147572274, 7620001 7620020 7572274, 12147572272 121
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and configuration of the set

The presented control set is dedicated to Mini One R55/R56 generation models with a 1.4 N12 petrol engine and an automatic transmission. The set includes a DME engine control unit, a CAS3 module responsible for start authorization, and a matched key, which ensures maintained compatibility of components within a single vehicle.

Such a combination is particularly important in modern powertrains, where the engine controller, security module, and key must be synchronized for the vehicle to start correctly and for all functions related to ignition and immobilizer to operate.

Benefits of using the complete Mini One R55 R56 Petrol N12 1.4 ECU Kit DME CAS3 + Key Automatic

Using a complete control set in a Mini One R55/R56 brings a number of practical benefits in daily service work and vehicle operation:

• maintaining consistency between the engine controller, CAS3 module, and key, which reduces the need for complex programming from scratch,
• facilitating diagnostics and vehicle starting after a failure of the original controller or security module,
• matching the petrol unit, which allows for proper control of fuel injection and ignition,
• adaptation to the automatic transmission, which enables correct communication with the gear shifting system.

Thanks to this set, you can systematically resolve issues with starting failures, communication errors between modules, or improper powertrain operation resulting from electronic damage.

Application in service practice

In Mini vehicles of this generation, the DME engine controller, CAS3 module, and key form a logical security and powertrain control system. In the event of damage to one of the components, it is often necessary to intervene in the entire set, which is why using a complete package is a sensible service solution, especially for more serious electronic faults.

The set will prove useful for, among other things:

• replacing a damaged engine controller after an electrical failure or flooding,
• problems with key authorization and communication with the CAS3 module,
• the need to transfer complete powertrain electronics between vehicles with similar configurations.

The components are sourced from dismantling, which allows for an economical approach to repair while maintaining performance characteristics close to factory standards, provided they are correctly installed and configured in the vehicle.

Electronic control modules and Mini controllers – expansion and selection

In modern Minis, an entire network of controllers responsible for the engine, transmission, comfort, and safety systems plays a key role. When planning a repair or upgrade of the powertrain, it is worth paying attention to the compatibility of individual modules, their software, and their links to the immobilizer and key. A properly selected ECU set with a CAS3 module and key allows for reducing the time required for adaptation and programming, which is important for both workshops and individual users.

If you are planning a comprehensive repair or upgrade of the engine control electronics in your Mini and need other components from the same group, such as engine controllers, security modules, or additional controllers, check the available parts in the Electronic control modules and Mini controllers category.

Substantive support and knowledge about electronic modules

Working with advanced vehicle electronics requires knowledge of diagnostic procedures, adaptation, and controller programming. It is worth using reliable sources of knowledge regarding engine control systems, comfort modules, or multimedia systems to avoid installation and programming errors. Materials describing the practical use of used controllers and modules in premium segment vehicles, including issues related to immobilizers, key coding, and CAN network integration, can be useful.

If you want to expand your knowledge about working with used controllers, modules, and related systems, read the article 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?, which discusses a practical approach to electronics in modern cars.