BMW E87 LCI E90 N43 116i 316i 2.0 Engine Unit ECU Kit DME 7621178 CAS3 Keys

BMW E87 LCI E90 N43 116i 316i 2.0 Engine Unit ECU Kit DME CAS3 Keys is a complete set from the Electronic control modules and controllers group, designed to support the powertrain in selected BMW models with the N43 engine. The kit includes the DME engine control unit, the CAS3 module, and matched keys, which facilitates a consistent replacement of control electronics and restores the proper operation of the drivetrain. It is a practical solution for workshops and users who need a compatible package of control components instead of individual modules.

Specifications and technical data

• SKU: 7621178-13
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7621178
• Substitutable numbers: 12147640015, 7640015, 12147621178, 7621178, 5WK94901, 61359237047, 9237047
• Category: ECUs & Computer Modules

Purpose and function of the ECU DME CAS3 kit

The presented control kit is dedicated to BMW 1 Series E87 LCI and 3 Series E90 vehicles with the N43 petrol engine in 116i and 316i 2.0 versions. The set includes the DME engine control unit, the CAS3 module responsible for start authorization, and keys matched to this system. Thanks to this, the entire immobilizer and engine management system remains consistent, which significantly simplifies the installation and subsequent configuration process in the vehicle.

A kit configured in this way allows for the replacement of a damaged engine control system in an orderly manner, maintaining compatibility between the engine electronics, the start comfort module, and the keys. This is particularly important in modern BMW designs, where communication between modules takes place via digital buses and requires matching software and identifiers.

Benefits of using a complete engine control unit kit

Using a complete ECU DME kit with the CAS3 module and keys brings a number of practical benefits in daily service work and individual repairs:

• a consistent package of engine and immobilizer control elements, reducing the risk of software conflicts,
• simplified adaptation procedure in the vehicle thanks to the matching of the controller, CAS3 module, and keys,
• the ability to restore proper starting and stable operation of the N43 unit after an electronics failure,
• a solution particularly useful for major engine controller faults or key authorization problems.

For workshops specializing in the BMW brand, such a kit provides a convenient base for further configuration, coding, and potential software updates according to the requirements of a specific vehicle.

Product characteristics and condition

The offered set comes from a BMW vehicle and belongs to the Electronic control modules and controllers group. The product is in used condition, which in practice means that before installation, standard diagnostic verification and matching to the specific car according to the manufacturer's procedures are recommended. A used set of this type is often chosen as an economical alternative to new components, while maintaining the original hardware specifications.

Due to the complexity of BMW electronic systems, the installation and configuration of such a kit should be carried out by a service center with appropriate diagnostic tools and experience in working with DME and CAS3 modules. This allows for fully utilizing the potential of the kit and avoiding communication problems between controllers.

Selection and compatibility of BMW electronics

When selecting a used ECU kit for a BMW E87 LCI or E90 with an N43 engine, it is crucial to match the controller generation, CAS3 module version, and key configuration to the specific year and vehicle specification. In practice, this means the necessity of comparing technical data and performing appropriate coding procedures. The advantage of a complete kit is that the basic elements of the system are already synchronized, which limits the scope of necessary modifications.

To better understand when choosing a used engine controller and related modules makes sense, it is worth reading the guide on our blog: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. The article discusses practical aspects of purchasing dismantled electronics, cost-effectiveness, and basic rules for the safe selection of such components.

Expanding work in the area of BMW electronics

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as additional controllers, auxiliary modules, or powertrain management systems, check the available parts in the BMW electronic control modules and controllers category.

Thanks to this, you can select a consistent set of control electronics in one place, which facilitates repair planning, optimizes workshop working time, and allows for maintaining a uniform component specification throughout the entire vehicle.