Mini R55 R56 N12 1.4 Petrol Engine Control Unit ECU Kit DME 7640005+CAS3+Keys

Mini R55 R56 N12 1.4 Petrol Engine Control Unit ECU Kit DME + CAS3 + Keys is a complete petrol engine control kit designed for Mini One models with the N12 1.4 unit. It includes the engine control unit, the CAS3 module, and matched keys, which facilitates the restoration of proper operation of the powertrain and security electronics in the car. With this kit, you can solve vehicle starting or control unit communication problems in a consistent, technically correct, and cost-effective manner.

Specifications and technical data

• SKU: 7640005-10
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640005
• Substitutable numbers: 12147589972, 7589972, 12147620005, 7620005, 0261S04161, 0 261 S04 161, 61359147196, 9147196, KZ
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME + CAS3 + keys kit

The presented kit belongs to the Electronic control modules and ECUs category and is dedicated to Mini vehicles with the N12 1.4 petrol engine. The combination of the DME engine control unit, the CAS3 module, and paired keys allows for maintaining the integrity of the immobilizer system, which is crucial when replacing electronics in modern vehicles.

In practice, this means the ability to:

• restore proper engine starting after the failure of the original control unit,
• maintain compatibility between the engine control unit and the security module,
• reduce the need for complicated programming from scratch.

Benefits of using a complete control unit kit

The ECU DME kit with CAS3 and keys is particularly useful in situations where more than one system component has been damaged or when the vehicle's history is incomplete. Using a complete package ensures:

• software consistency between the engine control unit and the CAS3 module,
• minimization of the risk of communication conflicts in the vehicle network,
• acceleration of the diagnostics and vehicle startup process after repair.

For N12 1.4 petrol units, a correctly selected set of control units has a direct impact on engine stability, throttle response, and the proper operation of safety functions.

Application in the N12 1.4 petrol engine

The N12 1.4 engine is a modern petrol unit in which the DME controller is responsible not only for fuel dosage and ignition but also for cooperation with other vehicle modules. The ECU kit with the CAS3 module and keys has been configured to work with this specific fuel type, which allows for maintaining:

• correct mixture control strategies under various load conditions,
• proper cooperation with on-board diagnostic systems,
• stable operating parameters in daily use.

Thanks to this solution, it is possible to effectively recreate the original logic of the powertrain, which is important both during repairs and when replacing damaged electronic components.

Characteristics of the used product

The offered kit comes from dismantling and has the status of a used electronic module. In practice, this means that the components were previously used in another vehicle but retain the functionality required for further operation after proper installation and potential adaptation. This type of solution is often chosen as a technically reasonable and economical alternative to new components.

Before installation, it is recommended to perform full vehicle diagnostics and verify software compatibility with the configuration of the specific Mini unit, which will allow you to fully utilize the potential of the kit and avoid unnecessary service downtime.

Substantive support and additional information

If you want to better understand how modern control modules work in premium segment cars and how to effectively use dismantled parts for electronics repairs, it is worth checking out the guide on iDrive systems and controllers in BMW – you will find it in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models, which discusses practical scenarios for working with used engine control units.

For those interested in a broader context of using used electronic components in vehicles from 1998–2012, including MINI models, the material describing the modernization of youngtimers may also be useful – more information can be found in the entry The second life of a youngtimer – how used car parts rejuvenate cars from 1998–2012, where, among other things, the selection and compatibility of electronic modules are discussed.

If you are planning a comprehensive repair or modernization of the engine area in your Mini and need other elements from the same group, such as engine control units, comfort modules, or security systems, check the available parts in the Mini Electronic control modules and ECUs category.