BMW E87 LCI E90 120i 320i Petrol N43 170HP ECU KIT DME 7599881 CAS3 Key Manual

BMW E87 LCI E90 120i 320i Petrol N43 170HP ECU KIT DME CAS3 Key Manual is an original electronic control module designed for a petrol engine paired with a manual transmission. This used component from the Electronic control modules and ECUs category allows for restoring the proper operation of the drivetrain without the need to invest in a new part, while maintaining factory engine performance parameters.

Specifications and technical data

• SKU: 7599881-20
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 7599881, 12147599881, 7583225, 12147583225, 7507228, 12147507228, 7580279, 12147580279, 7593667, 12147593667, 7585654, 12147585654, 7575668, 12147575668, 7579144, 12147579144, 7585304, 12147585304, 7599882, 12147599882, 7573758, 5WK93729, 9147195, 61359147195, 9147199, 6135914719
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The engine control unit (ECU) in a BMW E90 series with an N43 engine is responsible for comprehensive management of the petrol engine's operation, including fuel injection, ignition timing, and interaction with engine peripherals. The module is designed to work with a manual transmission, ensuring proper communication with other vehicle systems and stable drivetrain operation.

By using an original control unit, consistency with the factory BMW electronic architecture is maintained, which facilitates diagnostics, coding, and subsequent maintenance. This is a particularly beneficial solution when replacing a damaged ECU with a unit of matching specifications.

Benefits of using an original BMW module

Choosing an original engine control unit for the BMW E90 320i N43 allows you to maintain the correct operating parameters of the powertrain, without the risk of incompatibility typical of low-quality replacements. The module is factory-prepared for use with a petrol system, which translates into:

• stable engine starting and predictable throttle response,
• proper interaction with the vehicle's diagnostic systems,
• preservation of factory control maps and the operating logic of the N43 unit.

A used control unit with its OEM structure intact is a reasonable compromise between cost and quality, especially for the repair of daily-driven vehicles.

Selection and compatibility of the ECU

When selecting an engine control unit for a BMW, it is crucial to match the module to the specific engine version, fuel type, and transmission type. The presented ECU is designed for a petrol engine paired with a manual transmission, which minimizes the risk of communication issues within the vehicle network and simplifies the adaptation process in the car.

The module has a dedicated OEM part number and associated interchangeable numbers, which allows for precise verification of compatibility with a specific BMW E90 320i configuration. Before purchasing, it is recommended to compare the control unit data with information from the vehicle's documentation or a reading from the existing ECU to ensure full compatibility.

Practical application of used electronics

In the case of engine control units, using proven, used electronics is often a cost-effective solution that allows for restoring vehicle functionality while maintaining original build quality. A properly selected ECU module can operate in a vehicle for a long time, provided it is correctly installed, coded, and adapted to the specific vehicle.

If you want to better understand when choosing a used engine control unit is justified and how to safely select such a component for your car, it is worth reading our guide: A second life for electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?

Expanding the control system in your BMW

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, engine management modules, or related ECU units, check out the available parts in the BMW electronic control modules and ECUs category.