Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME 7641003 CAS3 Key Automatic

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME CAS3 Key Automatic is a specialized, used engine control unit designed for N14 174 HP engines in Mini models with an automatic transmission. As a component from the Electronic control modules and controllers group, it is responsible for precise management of engine operation, fuel injection, and ignition, ensuring stable and predictable performance of the drivetrain. This is a solution for users looking for a proven, factory-spec ECU instead of unreliable replacements.

Specifications and technical data

• SKU: 7641003-2
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7641003
• Substitutable numbers: 12147587549, 7587549, 12147631001, 7631001, 0261S04158, 0 261 S04 158, 61359147195, 9147195
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the DME controller

The presented DME module is the central Engine Control Unit responsible for coordinating all key operating parameters of the N14 engine in the Mini R56. The controller analyzes signals from sensors, selects the fuel dose, ignition timing, and auxiliary equipment operating strategies so that the engine maintains appropriate dynamics, refinement, and efficiency. The version dedicated to the automatic transmission works in harmony with the drivetrain, which is crucial for smooth gear shifting and correct communication between components.

Benefits of using an original ECU in the Mini R56 N14

Using a factory engine controller in a Mini with an N14 unit allows for maintaining consistency of software and operating parameters with the rest of the vehicle's installation. In practice, this means:

• retaining factory control maps and engine performance characteristics,
• proper cooperation with the automatic transmission,
• stable communication with other onboard modules,
• easier diagnostics using standard service tools.

For workshops and users, this means a lower risk of compatibility issues and a faster vehicle startup process after replacing the controller.

Application in a system with an automatic transmission

This ECU variant is intended for Mini vehicles equipped with an automatic transmission. The controller takes into account the specific operation of the automatic gearbox, which affects:

• the selection of torque available in individual gears,
• response to pressing the accelerator pedal,
• smoothness of gear changes in various driving modes.

Selecting the correct type of ECU for the drivetrain configuration is crucial to avoid communication errors, limp mode, or incorrect gearbox operation.

Professional selection and compatibility verification

The DME module has an assigned OEM part number and a set of interchangeable numbers, which facilitates precise matching to a specific Mini R56 N14 configuration. Before purchasing, it is worth comparing the markings of your controller with the data in the specification to confirm hardware and software compatibility. This minimizes the risk of additional adaptation work and reduces vehicle downtime.

If you want to better understand when choosing a used engine controller is justified and what to look for when selecting one, check out our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expansion and service of Mini electronics

When working on the Mini drivetrain, such as replacing the engine controller, there is often a need to reach for other elements from the same group of control electronics. 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 control modules, auxiliary controllers, or controllers working with the ECU, check the available parts in the Mini electronic control modules and controllers category.

Summary

Mini Cooper S R55 R56 R57 N14 1.6 174HP ECU Kit DME CAS3 Key Automatic is a used, factory engine controller designed for N14 units working with an automatic transmission. It offers consistency with the vehicle's original electronic architecture, predictable drivetrain behavior, and facilitated service diagnostics. For Mini owners and workshops specializing in the brand, it is a practical solution for repairs and replacements in the engine electronics area.