BMW E90 E91 N46 120i 320i 150HP Engine ECU KIT DME 7561834 CAS2 Key Manual

BMW E90 E91 N46 120i 320i 150HP Engine ECU KIT DME CAS2 Key Manual is an original electronic control module designed for N46 engines in 1 Series and 3 Series models with a manual transmission. This specialized ECU ensures precise engine management, supporting stable operation, correct throttle response, and proper integration with vehicle components. Thanks to its factory BMW design, it is a solution perfectly matched to the vehicle's electrical system.

Specifications and technical data

• SKU: 7561834-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7561834
• Substitutable numbers: 12147561834, 7561834, 12147565300, 7565300, 12147565301, 7565301, 12147557290, 7557290, 12147557930, 7557930, 0261201159, 61356943791, 6943791
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The engine control unit in N46 engines is responsible for coordinating all key engine operating parameters, such as fuel injection, ignition, and actuator operation. In BMW E87 and E90 series vehicles, it is a central element of the control system that communicates with other vehicle modules, ensuring consistent operation of the entire powertrain.

The version dedicated to manual transmissions is adapted to the characteristics of a manual gearbox, which promotes smooth gear shifting and predictable engine response across the entire rev range. A correctly selected control unit reduces the risk of communication errors between the engine and other vehicle systems.

Benefits of using an original BMW module

Choosing a control unit from the Electronic control modules and ECUs category sourced from BMW means maintaining the factory logic of the powertrain. The original design ensures:

• compatibility with the wiring harness and connectors used in E87/E90,
• proper cooperation with N46 engine sensors and actuators,
• possibility of adaptation and coding in accordance with BMW service procedures,
• stable operation under typical operating conditions.

For the user, this means a reduced risk of starting problems, rough idling, or the check engine light coming on, provided that the other components of the system are functional and correctly diagnosed.

Product characteristics and practical application

The presented control unit is a used item, which in the case of BMW electronics often represents a reasonable compromise between cost and functionality, especially when repairing vehicles that are several or more years old. The module may require software matching (coding, potential synchronization with the immobilizer) in accordance with the procedures used in a given workshop.

When selecting a control unit for a BMW E87 or E90 with an N46 engine and a manual transmission, it is crucial to verify compatibility with your vehicle's configuration. In practice, this means comparing technical data and consulting with a mechanic or automotive electrician to ensure proper cooperation with the existing installation.

Professional approach to used electronics

In the case of modules such as an engine control unit, a conscious approach to purchase and installation is particularly important. It is worth paying attention to:

• selecting the appropriate version for the specific model and transmission type,
• the planned method of programming and adaptation in the vehicle,
• the condition of the electrical installation and other components of the control system.

To better understand when choosing a used ECU is justified and how to safely carry out such a replacement, read our guide: The second life of electronics – when is it worth choosing used engine control units, comfort modules, and parking sensors?

Expanding the control system in your BMW

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