BMW 1 Series E81 E82 E87 LCI N47S 123d ECU Kit DDE CAS 3 Keys 7810002 Manual

BMW 1 Series E81 E82 E87 LCI N47S 123d ECU Kit DDE CAS 3 Keys Manual is a complete set from the Electronic control modules and controllers category, designed for BMW 1 Series models with the N47S 123d engine and manual transmission. The kit ensures the consistency of key powertrain control electronics, facilitating professional repair or replacement of the engine management system in facelift (LCI) vehicles.

Specifications and technical data

• SKU: 7810002-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810002
• Substitutable numbers: 13617811702, 7811702, 13618512589, 8512589, 13617812002 13617810002 13617808402 13618506325, 7812002 7810002 7808402 8506325, 13617809002 13617812502 13618508713, 7809002 7812502 8508713, 123d, N47S, 0281013776, 0 281 013 776, 61359147196, 9147196
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility of the ECU kit

The presented ECU kit is dedicated to the BMW 1 Series E81, E82, and E87 facelift generations, equipped with the N47S 123d engine and a manual transmission. Using a complete package consisting of the DDE engine controller, CAS 3 module, and matched keys minimizes the risk of issues with immobilizer synchronization, starting, and vehicle bus communication.

By maintaining the compatibility of components within a single set, the workshop receives a foundation for efficient adaptation of the powertrain electronics, without the need for time-consuming programming from scratch or tedious matching of individual modules.

Structure of the DDE + CAS 3 + keys kit

The kit includes the DDE engine controller, the CAS 3 module responsible for start authorization, and keys matched to this set. Such a combination allows for maintaining data consistency regarding the immobilizer, which is crucial when replacing electronics in modern BMW diesel units.

In practice, this means that after proper installation and basic configuration in the vehicle, the engine control system can be quickly restored to operation, and the process of diagnostics and potential further coding is simplified. This solution is particularly valued in workshops specializing in the BMW brand, where repeatability and predictability of the repair outcome are essential.

Benefits of using a complete ECU Kit

Using a complete ECU kit in a BMW 1 Series with an N47S 123d engine and manual transmission offers a number of practical benefits:

• consistency of key modules responsible for starting and engine control,
• reduction of issues with immobilizer and key matching,
• facilitation of diagnostic work thanks to a predictable electronics configuration,
• possibility of effective vehicle repair after an engine controller failure or CAS module damage.

For workshops specializing in BMW, this means faster order fulfillment, and for the end user – more efficient restoration of full vehicle functionality. The complete nature of the kit limits the number of variables in the repair process and allows focusing on correct installation and configuration.

Characteristics of the used BMW module

The offered kit comes from a used vehicle, which in the case of BMW electronics often represents a reasonable compromise between cost and functionality. Modules of this type are designed as long-life components, and their reuse in another vehicle – while following the proper installation and diagnostic procedure – allows for further, stable operation.

When choosing a used ECU kit, it is worth paying attention to the consistency of the elements included in the set and compatibility with the specific engine and transmission version. In this case, the kit is prepared for the N47S 123d unit with a manual transmission, which facilitates selection in the context of a specific powertrain configuration.

BMW electronic control modules and controllers – expansion and selection

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 additional controllers, engine management modules, or systems cooperating with the DDE, check the available parts in the BMW electronic control modules and controllers category.

When selecting used control modules, it is worth being guided not only by model compatibility but also by the powertrain configuration and transmission type. Proper component matching reduces the need for deep programming interventions and allows for a more predictable vehicle startup process after repair.

More about choosing used automotive electronics

For those who want to better understand when it is worth reaching for used engine controllers, comfort modules, or other electronic elements, we recommend the guide article A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips on selecting, verifying, and safely installing used electronic components.