BMW E87 LCI E90 E91 120i 320i Petrol N43 170HP ECU KIT DME 7599881 CAS3 + 2 Keys

Description

BMW E87 LCI E90 E91 120i 320i Petrol N43 170HP ECU KIT DME CAS3 + 2 Keys is a factory ECU module from the Electronic control modules and controllers group, designed for N43 petrol engines paired with a manual transmission. This solution allows you to restore proper engine operation, stable combustion parameters, and full functionality of the control systems in your BMW.

Specifications and technical data

• SKU: 7599881-19
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 7599881, 12147599881, 7583225, 12147583225, 7507228, 12147507228, 9226238, 61359226238, 9395657, 61359395657, 9287535, 61359287535, 9237047, 61359237047, 9217853, 61359217853, 9147226, 61359147226, 5WK93729
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented engine computer is dedicated to BMW 1 Series E87 LCI and 3 Series E90/E91 models in 120i and 320i versions with the 170 HP N43 engine. The module is responsible for precise control of the petrol engine’s operation, including fuel injection, ignition, and communication with sensors and actuators in the engine bay. Using the correct ECU is crucial for maintaining factory performance, smooth operation, and compatibility with the vehicle’s original software.

Drivetrain compatibility

The controller has been designed to work with a petrol engine and a manual transmission, ensuring consistency with the factory drivetrain configuration in the listed models. This enables proper communication with other modules in the vehicle, such as safety, comfort, or powertrain management systems. Matching the ECU correctly to the fuel type and transmission type reduces the risk of errors, limp mode, and diagnostic issues.

Application in service practice

This engine controller is suitable both for repairs following an ECU failure and for replacing a damaged module during standard maintenance. In workshop practice, it is particularly important to:

• select the controller based on the OEM number and interchangeable part numbers,
• verify compatibility with the specific N43 engine version and vehicle equipment,
• perform correct coding and adaptation to the vehicle after installation.

A properly selected ECU module helps reduce diagnostic time, facilitates the mechanic’s work, and minimizes the risk of needing to replace the component again.

Benefits of choosing a used BMW controller

Choosing a used controller from the original BMW line is a solution that combines factory compatibility with a more cost-effective repair compared to a new module. An original engine computer from this series maintains:

• compatibility with the electrical installation and network architecture in the BMW E87 LCI, E90, and E91,
• the ability for full integration with diagnostic systems used in service centers,
• operating parameters intended for the 170 HP N43 engine.

For workshops and individual users, this means easier installation, predictable vehicle behavior after replacement, and the preservation of driving characteristics consistent with factory specifications.

Selection, installation, and technical knowledge

To maximize the potential of this module, it is recommended to base your selection on the OEM number, reference numbers, and vehicle data (VIN, engine type, model year). A detailed discussion of selection principles, hardware and software compatibility, as well as practical installation tips can be found in the Global Parts guide: Used automotive electronics – second-hand ECU modules and sensors. This is a valuable source of knowledge for mechanics and informed users who want to minimize the risk of incorrect controller selection.

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