BMW E87 E90 118i 318i N46 Engine ECU KIT DME 7561834 CAS2 Keys Manual

BMW E87 E90 118i 318i N46 Engine ECU KIT DME CAS2 Keys Manual is an original electronic control module designed for the N46 petrol engine with a manual transmission. This specialized controller from the Electronic control modules and ECUs category is responsible for precise engine management, ensuring stable performance and predictable response to load. Thanks to its factory architecture, this ECU is the right choice for professional repairs or restoring the stock operating parameters of the powertrain.

Specifications and technical data

• SKU: 7561834-5
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7561834
• Substitutable numbers: 12147565301, 7565301, 12147561834, 7561834, 0261201159, 61356943791, 6943791
• Fuel type: Petrol
• Gearbox type: Manual
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The engine control unit in a BMW with an N46 engine plays a key role in managing the combustion process, fuel delivery, and ignition timing. In the case of the petrol version with a manual transmission, the ECU oversees the interaction between the engine and the drivetrain, ensuring smooth throttle response and stable idle speed across the entire operating range.

A properly selected Engine Control Unit allows for maintaining the factory characteristics of the powertrain, which is particularly important after mechanical repairs, component replacement, or when troubleshooting starting issues, rough running, or power loss.

Benefits of using an original BMW ECU

Using a controller from the same design family as the factory component ensures:

• preservation of the stock N46 engine control logic,
• consistency with the BMW E90 318i electrical system architecture,
• proper cooperation with other electronic modules of the vehicle,
• possibility of professional adaptation and coding within standard service procedures.

For workshops and users, this means easier diagnostics, predictable powertrain behavior, and reduced risk of problems resulting from improperly selected aftermarket replacements.

Application in a petrol system with a manual transmission

The presented controller is intended for a petrol-powered configuration paired with a manual transmission. This means that the control maps, torque control algorithms, and safety strategies have been developed for this specific drivetrain combination. In practice, this translates into:

• consistent system operation during gear changes,
• stable idle speed under typical operating conditions,
• correct response to sudden changes in engine load.

As a result, the powertrain retains the characteristics intended by the manufacturer, which is important both in daily driving and during further computer diagnostics.

Integration with vehicle electronics

As an element from the Electronic control modules and ECUs group, the ECU communicates with many other vehicle systems – from engine sensors and the ignition system to selected comfort and safety modules. Proper integration ensures:

• consistent messages on the vehicle data bus,
• correct support for OBD diagnostic functions,
• ability to read and clear error codes using standard service testers.

For the user, this means that after proper installation and coding, the controller can be fully integrated into the vehicle's existing electronic architecture without the need for modifying wiring harnesses or using additional adapters.

Condition and service application

The offered controller is in used condition, making it an attractive cost-effective solution while maintaining the factory design. This type of ECU is often chosen by workshops specializing in BMW as a component for:

• restoring the stock configuration after the original controller fails,
• troubleshooting engine electronics by swapping components,
• professional control system repairs in vehicles used on a daily basis.

Before installation, it is recommended to perform standard service procedures, such as proper coding and adaptation to the specific vehicle, to fully utilize the module's capabilities.

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

For those interested in the broader context of using original electronic modules in premium cars, including their impact on driving characteristics and brand behavior, we recommend the article on our blog: Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.