Mini Cooper R55 R56 R57 N12 120HP Petrol Engine ECU Kit DME 7573701 CAS3 Key

Mini Cooper R55 R56 R57 N12 120HP Petrol Engine ECU Kit DME CAS3 Key is a practical solution for workshops and users who need a verified engine electronics package. The set comes from the Electronic control modules and ECUs group and allows for a consistent replacement of key engine control components, minimizing the risk of vehicle starting issues.

Specifications and technical data

• SKU: 7573701-1
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 12147589972
• Substitutable numbers: 7573701, 7589972, 12147589972, 7572264, 12147572264, 7572276, 12147572276, 7572256, 12147572256, 7572260, 12147572260, 7620005, 12147620005, 7572270, 12147572270, 7620001, 12147620001, 7572268, 12147572268, 7620076, 0261201775, 0 261 201 775, 61356943822, 6943822
• Fuel type: Petrol
• Category: ECUs & Computer Modules

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

The presented set is dedicated to Mini Cooper R55, R56, and R57 models equipped with the 120HP N12 petrol engine. The kit includes the DME engine control unit, the CAS3 module responsible for start authorization, and a matched key, which ensures the consistency of the immobilizer and ignition control system.

A package configured in this way facilitates the replacement of damaged engine electronics without the need for time-consuming programming from scratch, which is particularly important for repairs following ECU failure, communication problems within the vehicle network, or start-related errors.

Benefits of using an original Mini kit

Using an original set from the Electronic control modules and ECUs group ensures high compatibility with the factory Mini electrical installation. The DME controller, CAS3 module, and key come from the same system, which allows you to:

• reduce the risk of software conflicts between the engine controller and the immobilizer,
• facilitate the adaptation process in the vehicle,
• maintain the factory operating logic of safety and starting systems,
• minimize diagnostic time after installation.

This solution is particularly beneficial for professional workshops looking to reduce repair time and for users seeking a technically consistent yet economical way to restore full functionality to the petrol engine control system.

Technical characteristics in the context of a petrol engine

The set has been designed to work with a petrol-powered engine, which is crucial for ignition maps, fuel dosage, and auxiliary system operating strategies. The DME controller in this configuration supports control algorithms specific to the N12 engine, and the CAS3 module ensures correct key authorization and communication with the vehicle network.

As a result, this kit is particularly useful in situations where the existing controller has suffered electronic damage, has been flooded, or there are persistent errors related to the synchronization of the immobilizer and the engine controller.

Condition, verification, and use in service practice

The elements included in the set are salvaged and have a used status, which allows for a favorable cost-to-functionality ratio while maintaining the manufacturer's original specifications. Before being offered for sale, components of this type are standardly verified for bus communication, readability, and the absence of visible connector damage.

In service practice, such a set is often chosen as an alternative to purchasing a single new controller that requires full coding. The DME + CAS3 + Key kit allows for simplifying the vehicle startup procedure after replacement, which is important for both independent workshops and individual users working with automotive electronics.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as an engine controller, FRM module, or multimedia system components, it is worth checking out the practical tips contained in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using salvaged parts?.

If you are planning a comprehensive repair or upgrade of the engine area in your Mini and need other elements from the same group, such as additional controllers, comfort modules, or systems supporting the engine's operation, check the available parts in the Mini Electronic control modules and ECUs category.

Additional arguments for choosing original salvaged components are also provided by the guide on the impact of such parts on the vehicle's resale value – you can find more on this topic in the material Original used parts vs. car resale price – how not to lose money?.