BMW Mini Cooper R55 R56 Petrol N12 1.6 ECU Kit DME CAS3 + Key 7640004 Automatic

BMW Mini Cooper R55 R56 Petrol N12 1.6 ECU Kit DME CAS3 + Key is a complete electronic set from the Computers and Controllers category, designed for N12 petrol engines in Mini Cooper models with an automatic transmission. The kit includes the DME engine control unit, the CAS3 module, and a matched key, which significantly facilitates restoring the proper operation of the drivetrain after an electronics failure.

Specifications and technical data

• SKU: 7640004-8
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7640004
• Substitutable numbers: 12147589972, 7589972, 12147572264 12147572276 12147572256 12147572260, 7572264 7572276 7572256 7572260, 12147572268 12147620005 12147572270 12147620076, 7572268 7620005 7572270 7620076, 12147620001 12147620020 12147572274, 7620001 7620020 7572274, 12147572272 121
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: Control Modules

Purpose of the ECU DME CAS3 + Key kit

The presented kit is dedicated to Mini vehicles with a 1.6 N12 petrol engine equipped with an automatic transmission. The combination of the DME controller, CAS3 module, and key allows for consistent management of the engine unit, immobilizer, and start authorization, which is crucial when replacing a damaged controller or dealing with communication issues between modules.

Thanks to the factory configuration of the components included in the set, it is possible to reduce the need for complex programming and synchronization, which in practice shortens repair time and reduces the risk of errors in the vehicle's electronic system.

Benefits of using a complete controller kit

Using a complete ECU kit with a CAS3 module and key in a Mini Cooper R55/R56 brings a number of practical service and operational benefits:

• consistent cooperation between the engine controller and the immobilizer system,
• minimized risk of software conflicts between modules,
• easier diagnostics and configuration compared to replacing individual components,
• possibility of effective vehicle repair after engine electronics damage or starting problems.

For workshops specializing in the Mini brand, such a kit is a convenient service solution, allowing for the efficient restoration of proper drivetrain operation without the need to source components from different origins.

Technical characteristics in the context of engine and transmission

The discussed ECU kit has been designed to work with the N12 petrol engine and an automatic transmission. This means that the control logic takes into account the specifics of the petrol unit's operation, including ignition management, fuel dosing, and adaptive corrections, while simultaneously communicating with the automatic transmission control module.

In practice, a correctly selected controller kit for a specific drivetrain configuration translates into stable idle operation, smooth gear changes, and correct response to load. This is particularly important in vehicles where previous incorrect electronics matching resulted in control errors or limp mode.

Application in Mini service and diagnostics

In professional workshops dealing with Mini electronics, the ECU DME CAS3 + Key kit is used both for typical repairs after a controller failure and in situations where it is necessary to replace the set due to problems with the immobilizer or the inability to code a new key. The complete kit allows for:

• accelerating the process of diagnostics and damage verification,
• reducing the number of programming operations required after installation,
• a more predictable repair result compared to mixing modules of different origins.

Thanks to this solution, the workshop can offer the customer an effective repair of the engine control and starting system while maintaining high repeatability of results.

Product condition and practical aspects

The components included in the kit are sourced from dismantling and are offered as used, which allows for an economical vehicle repair while maintaining the manufacturer's original specifications. For many Mini users, this is a reasonable compromise between cost and functionality, especially in the case of older models where investing in new controllers would be disproportionately high.

Before installation, it is recommended to perform a standard diagnostic procedure and verify the vehicle configuration compatibility to ensure the kit works properly with the other electronic systems in the car.

Related products and technical knowledge

If you are planning a comprehensive repair or upgrade of the engine electronics in your Mini and need other components from the same group, such as additional controllers, engine management modules, or auxiliary controllers, check out the available parts in the Mini Computers and Controllers category.

When selecting used controllers and comfort modules, it is worth following proven principles to avoid compatibility and durability issues. Practical tips on choosing and installing such components can be found in the article "Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?", which discusses the most important aspects of working with automotive electronics from the secondary market.