BMW E81 E87 E90 120i 320i N43 170HP ECU Kit DME 7580279 CAS3 Key Manual

BMW E81 E87 E90 120i 320i N43 170HP ECU Kit DME CAS3 Key Manual is an original electronic control unit designed for BMW petrol engines paired with a manual transmission. This component from the Electronic control units and controllers category is responsible for precise engine management, ensuring stable driving characteristics and proper communication with other vehicle systems. Thanks to its factory design, it is a solution tailored to the specifics of BMW 1 Series and 3 Series models with the N43 engine.

Specifications and technical data

• SKU: 7580279-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7580279
• Substitutable numbers: 7580279, 12147580279, 7599881, 12147599881, 7583225, 12147583225, 7507228, 12147507228, 7593667, 12147593667, 7585654, 12147585654, 7575668, 12147575668, 7579144, 5WK93637, 9147212, 61359147212, 9147220, 61359147220, 9147196, 61359147196
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine computer is designed for use with BMW 1 Series (E81, E87) and 3 Series (E90) petrol engines in 120i and 320i versions with the N43 engine and a manual transmission. As a central element of the engine management system, it oversees, among other things, fuel injection, ignition, and communication with other vehicle modules. A properly selected controller allows for maintaining the factory performance parameters of the engine and reduces the risk of errors resulting from incorrect compatibility.

Benefits of using an original BMW module

Using an original BMW control module from the same family as the factory-installed component ensures:

• consistency with the vehicle's electrical installation and network architecture,
• proper cooperation with the manual transmission,
• maintenance of the engine characteristics intended for the N43 unit,
• the possibility of further diagnostics using standard BMW service tools.

For workshops and users, this means easier configuration, predictable vehicle behavior, and a reduction in communication issues between modules. In the case of replacing a faulty controller, choosing a component from the same design group is crucial for the stability of the powertrain.

Application in vehicles with petrol engines and manual transmissions

This engine computer is intended for vehicles powered by petrol and equipped with a manual transmission. This means that its software and configuration are adapted to the specific operation of the N43 unit in combination with a mechanical drivetrain. Proper matching of fuel type and transmission type is essential for the correct operation of functions such as torque control, throttle response, and interaction with safety systems.

Product characteristics and practical application

As an item from the Electronic control units and controllers category, this engine computer is intended for installation in place of the factory controller in BMW vehicles. The product is offered as a used part, which allows for an economical repair of the engine control system while maintaining the original manufacturer's specifications. In practice, it will prove useful both in the event of a failure of the current module and when replacement is necessary as part of a broader powertrain repair.

Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and prepare for potential adaptation or programming in accordance with BMW service procedures. A correctly selected controller facilitates maintaining stable engine operation, reduces the risk of error codes appearing in the fault memory, and supports the proper functioning of related systems.

Expert support and electronics selection

If you are considering installing a used control module in your BMW and want to better understand what to look for when selecting electronics, it is worth checking the advice in the article A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the assessment of condition, compatibility, and the principles of safe installation of used electronic components.

Related BMW control modules

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