Mini Cooper R55 R56 N12 1.6 120HP ECU Kit DME CAS3 + Key 7589971 Manual

The Mini Cooper R55 R56 N12 1.6 120HP ECU Kit DME CAS3 + Key Manual is a complete engine control and immobiliser system designed for the 120 HP N12 engine in Mini Cooper models with a manual transmission. The kit includes the DME engine control unit, the CAS3 module, and a matched key, facilitating the restoration of the electronic system's functionality after a failure or engine replacement. This is a practical solution for workshops and owners who require a cohesive, factory-matched control package.

Specifications and technical data

• SKU: 7589971-9
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7589971
• Substitutable numbers: 12147589971, 7589971, 12147589972, 12147572264, 12147572276, 12147572256, 12147572260, 12147620005, 12147572270, 12147620001, 12147572268, 12147620076, 12147620020, 12147572274, 12147572272, 12147572266, 0261S04563, 61359217853, 9217853, 12147640005, 7640005, 12147640001, 7640001, 12147600020, 7600020, 12147600076, 7600076
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application and Function of the ECU DME CAS3 + Key Kit

This kit belongs to the Electronic Control Modules and Units category and is responsible for full communication between the N12 engine, the vehicle's security system, and the electrical system of the Mini Cooper R55/R56. Combining the DME, CAS3 module, and key in one package minimizes the risk of component compatibility issues, which is particularly important when replacing a used control unit in modern vehicles.

The set is designed for cars with a manual transmission, ensuring that the control unit's operating logic is consistent with the characteristics of a manual gearbox – from starting strategies and throttle response to cooperation with other onboard modules.

Benefits of Using a Complete Control Unit Kit

The ECU DME CAS3 + Key Kit for Mini Cooper N12 offers a range of practical advantages for daily servicing:

• Cohesion of the powertrain electronics and immobiliser system in a single package,
• Reduced need for zero-based programming of multiple modules,
• Lower risk of conflicts between the engine control unit and the CAS3 module,
• Easier startup after an engine swap or replacement of a damaged control unit,
• Faster diagnostics and vehicle startup after repair.

For workshops specializing in the Mini brand, such a kit is a convenient service solution, allowing for reduced vehicle downtime and fewer potential points of failure in the electronic system.

Technical Characteristics for N12 Engine Operation

The control system is prepared to work with the naturally aspirated 120 HP N12 petrol engine, typical for the Mini Cooper R55/R56. The DME controls, among other things, fuel delivery, ignition, accessory operation, and communication with other vehicle modules, while the CAS3 is responsible for key authorization and protection against unauthorized startup.

In practice, this means that after correct installation and configuration, the kit can restore full powertrain functionality, provided that other electrical and mechanical components are in good working order. The kit is particularly useful for:

• Replacing a damaged engine control unit,
• Immobiliser problems and lack of communication with the key,
• Engine unit swaps within the same engine generation.

Condition, Origin, and Installation Aspects

The product is sourced from dismantling and is offered as a used OEM Mini set, meaning it is factory-matched to the vehicle's electrical system and compatible with the electronic architecture of the Mini Cooper R55/R56. This allows for the preservation of the original system logic without the need for universal solutions or replacements of uncertain compatibility.

During installation, it is recommended to perform a full vehicle diagnosis, verify the wiring harnesses, and, if necessary, adapt the kit to the specific vehicle using appropriate service software. This approach allows for the full utilization of the kit's potential and ensures stable powertrain operation.

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

Technical Support and Mini Project Development

When working with advanced vehicle electronics, it is advisable to use reliable sources of knowledge regarding diagnostics, programming, and the selection of used modules. A good reference point for understanding the specifics of control units, comfort modules, and multimedia systems in the BMW/Mini group can be an article describing a practical approach to repairing electronics in related models – you can find it here: Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models Using Used Parts?.

If you are simultaneously developing a Mini Cooper S project and are interested in the impact of engine accessories on driving characteristics, a material comparing different turbocharging solutions might also be helpful: Go-Kart Feeling XXL: Used N18 Turbocharger vs. B48 – What to Choose for a Mini Cooper S?. This allows for a better understanding of how the selection of mechanical and electronic components translates into the final driving experience.