Mini Cooper D R55 R56 Diesel W16 1.6 109HP ECU Kit DDE 7823934 CAS3 Keys Manual

Mini Cooper D R55 R56 Diesel W16 1.6 109HP ECU Kit DDE CAS3 Keys Manual is a complete electronic set designed for Mini diesel systems with a manual transmission. In one package, you receive a complete engine control unit set with the CAS3 module and matched keys, which significantly facilitates professional repair or replacement of vehicle electronics. This is a practical solution for workshops and users looking for a consistent, factory-spec set for the 1.6 Diesel engine.

Specifications and technical data

• SKU: 7823934-2
• Mark: Mini (Genuine OE)
• Condition: Used
• OEM Part Number: 7823934
• Substitutable numbers: 13617809794, 7809794, 13617823934, 7823934, 13617807221 13617808744 13617810909 13617808778, 7807221 7808744 7810909 7808778, 13617807808 13617808454, 7807808 7808454, 0281015233, 0 281 015 233, 61359217853, 9217853
• Fuel type: Diesel
• Gearbox type: Manual
• Category: ECUs & Computer Modules

ECU kit purpose and configuration

The presented set belongs to the Electronic control modules and ECUs category and is dedicated to Mini Cooper D R55 and R56 series models with a 1.6 109HP diesel engine. The set includes the DDE controller, the CAS3 module, and paired keys, which allows for maintaining the consistency of the immobilizer, security systems, and engine operation logic. The configuration is prepared for a diesel engine and a manual transmission, ensuring that the logic for fuel injection control, starting, and transmission interaction is in line with the manufacturer's factory specifications for Mini. This selection of components minimizes the risk of vehicle starting issues after replacing the electronics.

Benefits of using a complete DDE + CAS3 + keys set

Using a complete ECU set with the CAS3 module and keys provides a number of practical benefits in daily service work:

• a consistent engine control and immobilizer set, reducing the need for programming from scratch,
• maintaining compatibility between the DDE controller and the CAS3 module,
• easier diagnostics and configuration compared to sourcing individual components from different sources,
• a solution particularly useful in the event of a failure of the original controller or damage to the security system. For workshops specializing in the Mini brand, such a set is a convenient base for a quick and organized repair of the engine control system, without the need for tedious matching of many independent modules.

Product characteristics and condition

The offered set comes from the Mini brand and is part of the vehicle's original electronic architecture. The product is in used condition, which in practice means it was previously operated in a vehicle but is still suitable for further use after proper installation and potential adaptation in the target car. A used ECU set with CAS3 and keys is a reasonable choice wherever cost-effectiveness and maintaining factory engine control logic are important. In many cases, this allows for restoring full vehicle functionality at a lower cost than purchasing new components.

Application in a diesel engine with a manual transmission

The system has been prepared for use with a diesel unit and a manual transmission, which is crucial for the proper operation of functions such as starting, torque control, or load response. Proper matching of the fuel type and transmission type reduces the risk of communication errors between the controller and other vehicle modules. For Mini Cooper D R55/R56 users, this means the ability to restore stable engine operation, correct immobilizer system functionality, and maintain predictable driving characteristics consistent with the manufacturer's factory settings.

Technical support and selecting used electronics

If you want to better understand when choosing a used ECU set, comfort module, or sensors is technically and economically justified, it is worth consulting specialized materials. Practical tips on selection, verification, and installation can be found in the article Second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses key aspects of working with second-hand automotive electronics. If you are planning a comprehensive repair or upgrade of the engine control area in your Mini and need other components from the same group, such as additional controllers, engine management modules, or related electronic systems, check the available parts in the Mini electronic control modules and ECUs category.