BMW E87 120i E90 E91 320i N46 150HP Engine ECU Unit DME 7545042 Automatic

BMW E87 120i E90 E91 320i N46 150HP Engine ECU Unit DME is a factory electronic control module designed for vehicles with an automatic transmission and a petrol engine. As an item from the Electronic control modules and ECUs category, it is responsible for the precise management of the engine's operation, ensuring stable driving characteristics and proper integration with other vehicle systems. This is a solution for users who want to restore full functionality to the engine control system while maintaining compatibility with the factory BMW architecture.

Specifications and technical data

• SKU: 7545042-8
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7545042
• Substitutable numbers: 7545042, 12147545042, 7557291, 12147557291, 7552177, 12147552177, 7552176, 12147552176, 7550535, 12147550535, 7550534, 12147550534, 7545043, 12147545043, 7531846, 12147531846, 0261208540, 0 261 208 540
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented DME unit is designed to work with the 150HP N46 petrol engine in BMW E87 120i and BMW E90/E91 320i models equipped with an automatic transmission. The module's hardware configuration allows it to be used in vehicles where it is necessary to maintain the original engine control logic, including support for the automatic transmission, safety systems, and comfort systems.

Thanks to the use of an original BMW solution from the Electronic control modules and ECUs category, the module can be matched to a specific vehicle during programming or adaptation at a specialized service center. This allows for consistency with the factory software and the vehicle's equipment configuration.

Function of the DME unit in the N46 engine

The engine control unit in this configuration plays a key role in managing the operation of the N46 petrol engine, coordinating, among other things:

• fuel dosage and injection timing based on load and operating conditions,
• ignition control, taking into account engine operating parameters,
• cooperation with the automatic transmission regarding torque and load information,
• support for sensors and actuators responsible for the engine's performance and smoothness,
• communication with other electronic modules in the vehicle via the data bus.

A properly selected DME unit allows for the restoration of correct drivetrain operation after electronic failure, communication problems between modules, or damage to the original unit.

Characteristics of the used module

The offered unit is a used, original BMW part, which helps maintain proper fitment with the electrical installation and vehicle architecture. A used module is an economical solution, especially for repairs where it is important to combine technical compliance with reduced service costs.

Before installation, it is recommended to verify compatibility with your specific vehicle based on the part number and interchangeable numbers available in the technical specifications, as well as to consult with a workshop experienced in programming BMW ECUs. In many cases, it will be necessary to perform a coding or adaptation procedure for the specific car to ensure full functionality of all systems.

Benefits of using an original BMW ECU

Using a factory DME module in a BMW E87 120i and E90/E91 320i with an N46 engine and automatic transmission allows for:

• maintaining consistency with the factory vehicle configuration and manufacturer software,
• preserving proper cooperation with other electronic modules,
• reducing the risk of communication problems within the vehicle network,
• restoring stable operation of the petrol engine under various operating conditions.

For users who want to consciously manage repair costs, a used unit from the Electronic control modules and ECUs category represents a reasonable compromise between price and functionality, while maintaining the original BMW specification.

Technical support and additional information

If you want to better understand how the BMW engine control unit and other electronic modules in the 3 and 5 series work, as well as how to safely use salvaged parts, check out our guide: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models. You will find practical tips on diagnostics, selection, and installation of used modules there.

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 engine ECUs, engine management modules, or electronic parameter control systems, check out the available parts in the BMW Electronic control modules and ECUs category.