BMW E87 LCI E90 E91 118i 318i Petrol N43 143HP ECU KIT DME 7599881 CAS3 + Key

BMW E87 LCI E90 E91 118i 318i Petrol N43 143HP ECU KIT DME CAS3 + Key is an original electronic control module designed for N43 petrol engines in 1 Series and 3 Series models. This specialized controller ensures precise management of the powertrain, supporting stable operation, correct throttle response, and compliance with BMW's factory characteristics. By maintaining OEM specifications, it is a particularly beneficial solution for professional repairs or restoring the vehicle's factory parameters.

Specifications and technical data

• SKU: 7599881-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7599881
• Substitutable numbers: 12147583225, 7583225, 121476211781214759988112147595179, 121475936661214750722712147579142, 7621178, 75998817595179759366675072277579142, 121475853031214758322512147580279, 758530375832257580279757566575737589147212, 61359237047, 9237047, 12147575665
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine computer is an element from the Electronic control modules and controllers group, responsible for coordinating the operation of the N43 petrol unit in BMW 118i and 318i models after the facelift. The module analyzes signals from sensors, controls fuel injection, ignition, and other key processes to maintain proper performance and correct operation of the drivetrain. Thanks to the use of a dedicated controller, it is possible to maintain the dynamics characteristic of BMW, predictable response to load, and stable idle operation. This is particularly important when replacing a damaged computer or restoring a vehicle to its factory-intended state.

Benefits of using an original module

Using an original controller in an N43 petrol engine brings a number of practical benefits in daily operation:

• Consistency with factory software – the module is designed for a specific powertrain and BMW electrical architecture.
• Stable engine operation – correct control of the mixture and ignition promotes smooth operation across the entire rev range.
• Proper cooperation with other vehicle systems – the controller communicates with other modules, which is important for diagnostics and safety.
• Possibility of professional adaptation and coding – the module is suitable for handling within standard BMW service procedures. An engine computer configured in this way is a good choice both for typical repairs and for more advanced service work related to the drivetrain.

Technical characteristics and compatibility

The module has been designed to work with a petrol unit, which is important for the correct control of the combustion process and the operation of sensors and actuators specific to this type of fuel. The presence of dedicated part numbers and interchangeable numbers facilitates the selection of the appropriate controller for a specific vehicle configuration and production year. Before installation, it is recommended to verify compatibility with your BMW 1 Series or 3 Series and prepare for potential programming and matching to the vehicle's installation. This allows the computer to be correctly integrated into the existing network of controllers and safety systems.

Condition, origin, and service application

The offered module comes from dismantling and is a used item, which allows for an economical restoration of the engine control system while maintaining the original BMW specification. This type of solution is often chosen by workshops specializing in the brand that are looking for parts with a factory design while wanting to optimize repair costs. The computer will work well both in routine repairs and in more extensive service projects where maintaining consistency with the original electrical architecture of the vehicle and proper cooperation with factory diagnostic systems is crucial.

Expansion of the control system in BMW

If you are planning a comprehensive repair or upgrade of the engine control area in your BMW and need other elements from the same group, such as additional controllers, engine management modules, or auxiliary controllers, check the available parts in the BMW electronic control modules and controllers category. To compare the approaches of different manufacturers to original electronic components and the impact of used modules on maintaining the car's character, it is worth reading the article on our blog: Audi and pure emotion – how used parts help maintain the brand's DNA. It allows you to better understand why choosing the right controller is also important in the case of BMW.