BMW 3 Series E90 320si DME Petrol N45 Engine Control Unit ECU 7560955 Manual

BMW 3 Series E90 320si DME Petrol N45 Engine Control Unit ECU is a specialized engine controller designed for petrol units paired with a manual transmission. It is responsible for precise engine management, ensuring stable power characteristics, correct fuel dosing, and ignition control. This solution is dedicated to users looking for a proven, original module from the Computers and controllers category for their BMW.

Specifications and technical data

• SKU: 7560955
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7560955
• Substitutable numbers: 12147560956, 7560956, 12147560955, 7560955, 0261201108, 0 261 201 108
• Fuel type: Petrol
• Gearbox type: Manual
• Category: Control Modules

Purpose and function of the DME module

The presented DME module is a central element of the engine control system in the BMW 3 Series E90 320si with the N45 unit. Its task is to continuously analyze signals from sensors and control actuators, such as injectors or the ignition system. Thanks to this, the petrol engine maintains proper operating parameters under various load and temperature conditions.

The controller is designed to work with a manual transmission, which is significant for torque control logic, throttle response, and cooperation with other vehicle systems. Using the appropriate DME module allows for maintaining the factory characteristics of the powertrain and limits the risk of communication errors in the electrical installation.

Benefits of using an original BMW controller

Choosing an original module from the BMW Computers and controllers category ensures compatibility with the electrical installation and the CAN network architecture in the vehicle. This means proper interaction with other electronic systems, such as safety or comfort systems. A properly selected controller minimizes the risk of engine starting problems, unstable idle, or warning lights appearing on the dashboard.

The DME module designed for a petrol engine allows for maintaining correct combustion parameters, which helps keep fuel consumption at the expected level and reduces exhaust emissions. For the user, this means more predictable operation and easier diagnostics in case of further service work.

Application in vehicles with a petrol engine and manual transmission

This controller is structurally prepared to support a petrol unit, therefore the control algorithms are adapted to the characteristics of spark ignition, lambda sensor operation, and the fuel injection system typical for this type of engine. Proper matching to the fuel type is crucial for the durability of the powertrain and the correct operation of OBD diagnostic systems.

Adaptation to a manual transmission means that the logic of torque control, response to gear changes, and cooperation with driver assistance systems are consistent with the factory assumptions for this drivetrain configuration. As a result, the dynamics characteristic of BMW and predictable car behavior during acceleration and downshifting are maintained.

Product condition and installation aspects

The offered DME module is a used item, which in practice means it comes from disassembly and may show signs of previous use, while maintaining the functionality required for further operation. This type of solution is often chosen as an economical alternative to new controllers, especially for vehicles used on a daily basis.

Before installation, standard procedures related to the adaptation of the controller in the vehicle should be considered, such as potential coding, synchronization with the immobilizer, or matching to the equipment configuration. It is recommended to entrust these tasks to a workshop with appropriate diagnostic facilities, which will reduce the risk of communication errors and speed up the vehicle's startup after replacement.

Selecting the right controller and additional materials

To properly select a DME module for a specific BMW vehicle, it is worth paying attention to compatibility with the engine code, fuel type, and transmission type. Information about available interchangeable part numbers, which allow confirming compatibility within the same family of controllers, can also be helpful. In case of doubt, a good solution is to consult a mechanic or an automotive electronics specialist.

If you want to better understand when choosing a used engine controller is justified and what to look for when purchasing one, read the article: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. You will find practical tips there regarding the selection and verification of automotive electronics.

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 engine controllers, powertrain management modules, or electronic control systems, check the available parts in the BMW Computers and controllers category.