BMW E87 LCI E90 120i 320i N43 170HP ECU Kit DME 7595179 CAS3 + Key Manual

BMW E87 LCI E90 120i 320i N43 170HP ECU Kit DME CAS3 + Key Manual is a set from the Electronic control modules and controllers group, designed for BMW vehicles with the N43 170HP engine and manual transmission. The kit includes the engine control unit (ECU), CAS3 module, and a key, which facilitates a consistent configuration of the powertrain electronics and the vehicle's immobilizer system.

Specifications and technical data

• SKU: 7595179-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7595179
• Substitutable numbers: 7595179, 12147595179, 7599881, 12147599881, 7583225, 12147583225, 7507228, 12147507228, 7580279, 12147580279, 7593667, 12147593667, 7585654, 12147585654, 5WK93727, 61359147226, 9147226, 12147593666, 7593666
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented kit is dedicated to BMW 1 Series E87 LCI and 3 Series E90 models in 120i and 320i versions with the 170HP N43 unit. Using the ECU + CAS3 + key kit allows for a consistent match of powertrain control components, which is particularly important when replacing electronics after a failure or when troubleshooting engine start issues.

The configuration is prepared for a manual transmission, ensuring that the engine control logic, RPM, and torque management are adapted to the characteristics of a manual gearbox, which is significant for both performance and component durability.

Function of the ECU, CAS3, and key in the vehicle system

The engine control unit in this kit is responsible for precise control of the N43 unit – from fuel injection and ignition timing to communication with other vehicle modules. The CAS3 module acts as the central element of the access and start system, integrating immobilizer functions, key authorization, and communication with other controllers in the vehicle.

The included key is paired with the CAS3 module, which in practice simplifies the adaptation process in the car – it minimizes the need for additional programming compared to replacing individual components. Such a kit is particularly useful for advanced electronics repairs where maintaining data consistency within the vehicle's security system is required.

Application in diagnostics and repairs

The ECU kit with CAS3 and key is suitable both for typical replacement of a faulty controller and for more complex service scenarios where it is necessary to restore the full communication logic between modules. This allows for effective troubleshooting of:

• inability to start the engine after an electronics failure,
• incorrect communication between the engine controller and the CAS3 module,
• errors related to key authorization and the immobilizer.

A properly selected kit from this group helps reduce diagnostic time and speeds up the restoration of full vehicle functionality, which is important for both professional workshops and individual users.

Product characteristics and condition

The offered set belongs to the Electronic control modules and controllers category by BMW, which ensures the preservation of the factory connection architecture and compatibility with the original vehicle installation. The components are pre-owned, making them an attractive cost-effective solution while maintaining proper functionality for service applications.

Choosing a used ECU + CAS3 + key kit is particularly beneficial for cars where a full replacement with new components would be economically unjustified. The kit allows for a technically sound repair while simultaneously reducing material costs.

Technical support and additional information

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 controllers, modules, or engine management systems, check out the available parts in the BMW electronic control modules and controllers category.

Before deciding to install a used ECU, CAS3 module, and key kit, it is worth familiarizing yourself with practical tips regarding the selection and verification of automotive electronics – a detailed discussion can be found in the article "A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?", which will help you consciously plan your repair and avoid common mistakes when working with BMW electronics.