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 the drivetrain of the facelifted BMW 1 Series. The kit includes the ECU DME engine controller along with the CAS3 module, which allows for consistent management of the engine's operation and the vehicle's authorization system. This solution is dedicated to cars with a petrol engine and a manual transmission, ensuring precise control over engine performance parameters.

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 with the CAS3 module belongs to the Electronic control modules and controllers group, responsible for comprehensive management of the engine's operation and vehicle security. In the case of the N43 petrol engine in the 116i model, the controller monitors, among other things, fuel dosage, ignition, and interaction with auxiliary equipment, adjusting parameters to current operating conditions. The combination of the ECU DME with the CAS3 module enables consistent operation of the starting system and immobilizer, which is crucial when replacing electronics in modern BMWs. Thanks to this kit, it is possible to restore correct communication between the engine controller and the authorization system, which facilitates the adaptation process in the vehicle.

Drivetrain compatibility

This kit has been prepared for BMW 1 Series E81/E87 LCI cars with the N43 petrol unit and a manual transmission. Using the correct type of controller for a specific drivetrain configuration is essential for the proper operation of systems, idle stability, and load response. In practice, this means that the module is optimized to work with the characteristics of the petrol engine, its injection and ignition maps, as well as the logic of the manual gearbox. Proper matching of the electronics to the fuel type and transmission reduces the risk of diagnostic errors and vehicle starting problems.

Benefits of using an original BMW module

Using an original electronic control module in a BMW allows you to maintain the factory logic of the drivetrain. Compared to universal solutions or those not adapted to a specific model, such a controller provides:

• consistent communication with other controllers in the vehicle,
• proper cooperation with the CAS3 system and immobilizer,
• stable engine operation across the full load range,
• easier diagnostics using factory service tools. For the user, this means more predictable vehicle behavior and the possibility of effective service maintenance without the need for compromise software solutions.

Condition, origin, and service application

The module comes from dismantling and is offered as a used original BMW part. Such components are frequently used in professional workshops specializing in automotive electronics, especially for repairs where it is necessary to replace the complete ECU kit with CAS3. In practice, such a set is used, among other things, for:

• damage to the original engine controller,
• communication problems between the ECU and the CAS module,
• projects related to restoring vehicle functionality after a collision or major electronic failure.

Integration with other modules and part selection

When selecting an ECU DME engine computer with CAS3 for a BMW 1 Series, it is crucial to pay attention to compatibility with the specific engine version, fuel type, and transmission. A properly selected kit facilitates subsequent configuration and programming, and also reduces the time required for adaptation in the vehicle. If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as comfort controllers, light modules, or ABS controllers, check the available parts in the BMW electronic control modules and controllers category.

Substantive support and knowledge of automotive electronics

The selection of appropriate control modules, their programming, and integration with the existing installation require knowledge of the specifics of individual brands. If you are interested in how original controllers and modules affect vehicle behavior and the preservation of the manufacturer's character, it is worth reading the article on our blog: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?. Although it concerns a different brand, it well illustrates the importance of using original electronic modules in modern cars.