BMW E81 E87 LCI 116i 2.0 Engine Petrol N43 ECU Kit DME 7599881 CAS3 Key Manual

BMW E81 E87 LCI 116i 2.0 Engine Petrol N43 ECU Kit DME CAS3 Key Manual is an advanced electronic control unit designed for petrol engines paired with a manual transmission. This component from the Electronic control modules and controllers group is responsible for precise engine management and communication with the CAS3 system, which is crucial for the stable operation of the drivetrain and vehicle safety.

Specifications and technical data

• SKU: 7599881-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 12147640015, 7640015, 12147621178, 7621178, 12147599881, 7599881, 5WK93729, 61359226238, 9226238
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented ECU DME engine computer integrated with CAS3 functionality has been designed for BMW 1 Series E81/E87 LCI models with the N43 2.0 petrol engine. The controller is responsible for monitoring combustion parameters, fuel dosage, ignition, and interacting with the vehicle's security systems, which translates into predictable throttle response and proper engine operation across the full load range.

Thanks to its dedicated fitment for the specific engine configuration and manual transmission, the module ensures seamless operation with the factory electrical installation and other electronic vehicle systems.

Benefits of using an original BMW module

Choosing an original controller from the Electronic control modules and controllers group allows you to maintain factory engine performance characteristics and compatibility with the manufacturer's software. This is particularly important for direct-injection petrol engines, where control precision impacts refinement, fuel consumption, and exhaust emissions.

The main advantages of using this module include:

• retention of factory engine management maps,
• proper cooperation with the CAS3 system responsible for start authorization,
• compatibility with the vehicle's electrical system equipped with a manual transmission,
• the ability to restore full vehicle functionality after a failure of the previous controller.

Characteristics of the used controller

The offered module is a used part, which in practice represents a favorable compromise between repair costs and maintaining the original manufacturer's specifications. This type of solution is often chosen for professional repairs where the priority is matching the specific engine version and equipment rather than replacing it with universal aftermarket alternatives.

Before installation, it is recommended to verify compatibility with the part number and interchangeable numbers in the technical specifications, as well as to consider the need for adaptation, programming, or synchronization with the CAS3 system in accordance with BMW service procedures.

Professional selection of used electronics

When choosing a used engine computer, it is crucial to match it to the fuel type, transmission type, and engine version. In this case, the controller is intended for a petrol engine paired with a manual transmission, which minimizes the risk of compatibility issues after installation.

To better understand when it is worth choosing used control modules and how to select them safely, it is worth reading our guide: 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 used automotive electronics, including ECUs, and helps reduce the risk of an incorrect choice.

Expanding the BMW control system

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

This approach allows you to organize key electronic components responsible for engine operation in a single service stage, which promotes the stability of the entire drivetrain and facilitates future diagnostics.