Mini Cooper R56 N12 1.6 120HP Petrol ECU Kit DME 7640005 CAS3 + Key Automatic

Mini Cooper R56 N12 1.6 120HP Petrol ECU Kit DME CAS3 + Key Automatic is a practical solution for workshops and users who need a verified engine electronics kit for the petrol version with an automatic transmission. The kit allows for a consistent replacement of key powertrain control components, reducing the risk of immobilizer issues and communication problems between modules.

Specifications and technical data

• SKU: 7640005-6
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• 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 function of the ECU DME + CAS3 + Key kit

The presented set is designed to work with the 120HP N12 unit in the Mini Cooper R56, in a configuration with an automatic transmission. The combination of the DME engine controller, the CAS3 module, and a matched key ensures the consistency of immobilizer data, which facilitates adaptation in the vehicle and limits the need for extensive programming.

In workshop practice, such a kit is particularly useful for:

• failure of the original engine controller or memory damage,
• problems with the CAS3 module responsible for start authorization,
• the need to replace several powertrain electronics components simultaneously.

Benefits of using a complete kit for Mini Cooper R56

Using a complete powertrain electronics kit in a Mini allows for an organized and predictable repair of the control system. The consistency of the DME controller, CAS3 module, and key minimizes the risk of software conflicts and errors related to mismatched immobilizer codes.

For service centers and automotive electronics specialists, this means:

• less time spent on matching individual modules,
• easier diagnostics after installation,
• greater predictability of the final repair result.

In the case of the N12 petrol unit with an automatic transmission, proper communication between the engine controller and other vehicle modules is particularly important, which is why the complete ECU kit with CAS3 is a solution often chosen for more serious electronics failures.

Operating characteristics in a petrol engine with an automatic transmission

In the N12 petrol engine, the DME controller is responsible for precise control of fuel dosage, ignition, and cooperation with auxiliary systems. The version intended for an automatic transmission works with modules responsible for gear shifting, which is why selecting the correct variant is crucial for the proper operation of the powertrain.

A properly selected kit:

• ensures stable operation at idle and under load,
• enables proper communication with the automatic transmission module,
• facilitates maintaining the factory operating parameters of the power unit.

Condition, origin, and use in service practice

The set comes from dismantling and is offered as an item from the Electronic control modules and controllers category, which means it has been removed from a vehicle and is intended for re-installation by the user or a workshop. This type of solution is often chosen as an economical alternative to new components, while maintaining the original manufacturer's specifications.

In installation practice, this type of kit is particularly useful when the existing engine controller or CAS3 module has been damaged in a way that prevents software repair. The Mini Cooper R56 N12 1.6 120HP Petrol ECU Kit DME CAS3 + Key Automatic then allows for the restoration of start and engine control functions with a limited scope of additional programming work.

Repair expansion and technical knowledge

If you are planning a comprehensive repair or upgrade of the powertrain electronics area in your Mini and need other components from the same group, such as additional controllers, comfort modules, or auxiliary systems, check the available parts in the Mini electronic control modules and controllers category.

For those interested in deepening their knowledge about the operation of engine controllers, comfort modules, and multimedia systems in premium class vehicles, an article describing a practical approach to electronics repairs in BMW 3 and 5 series may be helpful, available at the link: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models.