Mini Cooper R55 R56 R57 N12 120HP ECU Control Unit Kit DME 7640005 CAS3 Key

The ECU DME Engine Control Unit Kit with CAS3 Module and Key for Mini Cooper R55/R56/R57 N12 120 HP is a factory set from the Electronic Control Units and Controllers category, designed for professional powertrain management. The kit ensures consistency between the drive electronics and the immobilizer, facilitating the restoration of full vehicle functionality after a breakdown or engine replacement.

Specifications and technical data

• SKU: 7640005-2
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• Substitutable numbers: 12147589972, 7589972, 12147572264, 7572264, 12147572276, 7572276, 12147572256, 7572256, 12147572260, 7572260, 12147620005, 12147572270, 12147620001, 12147572268, 12147620076, 12147620020, 12147572274, 12147572272, 12147572266, 12147589971, 0261S04161, 61359147195, 9147195
• Category: ECUs & Computer Modules

Kit Purpose and Configuration

The Mini Cooper R55, R56, R57 with the N12 120 HP engine utilizes an integrated control system where the DME engine control unit works in conjunction with the CAS3 module responsible for start authorization. The offered kit includes the ECU control unit, the third-generation CAS module, and a matching key, which helps maintain immobilizer data consistency and minimizes the need for additional programming.

A kit configured in this way is particularly useful for:

• replacing a damaged DME control unit in a Mini Cooper with an N12 engine,
• problems with immobilizer and engine control unit synchronization,
• powertrain electronics conversion as part of accident repair or after engine replacement.

Benefits of Using a Complete ECU + CAS3 + Key Kit

Using the complete ECU Control Unit Kit DME with CAS3 Module and Key helps reduce the risk of software incompatibility and communication errors between the engine control unit and the vehicle's security system. In practice, this means:

• maintaining consistency of immobilizer and key data,
• reducing the scope of coding compared to replacing a single module,
• a more predictable vehicle startup process after installation.

An additional advantage is the ability to select the kit by OEM number and interchangeable numbers, which facilitates matching it to the specific Mini Cooper configuration based on factory data.

Selection by OEM and Interchangeable Numbers

The offered kit belongs to the group of Mini Electronic Control Units and Controllers, which come in many hardware and software variants. Proper selection is based on the OEM part number and the list of interchangeable numbers, allowing for precise matching of the control unit to the specific N12 engine version and vehicle equipment.

Before purchasing, it is advisable to compare the markings on the removed control unit and CAS module, and if in doubt, use the VIN number and service documentation. This helps avoid problems with compatibility, bus communication, and the operation of comfort and security functions.

Condition, Verification, and Practical Application

The kit comes from an operational vehicle, which is typical for original ECU modules used as replacement parts. Such kits are often chosen by workshops specializing in the Mini brand, as they allow for economical repairs while maintaining the factory electronics architecture.

To better understand how to safely select and install used control units, it is worth reading the Global Parts guide: used automotive electronics – second-hand ECU modules and sensors. The article discusses selection by VIN/OEM, hardware and software compatibility issues, and practical application examples.

Other Mini Electronic Control Units and Controllers

If you are also looking for other Mini Electronic Control Units and Controllers for your car, check out the Mini Electronic Control Units and Controllers available in our store. This will allow you to easily assemble the remaining electronic system components in a single, consistent configuration.