BMW E87 E90 E91 118i 318i N46 129HP Engine Control ECU Kit DME 7557290 Automatic

BMW E87 E90 E91 118i 318i N46 129HP Engine Control ECU Kit DME is a complete electronic engine control module designed for the 129 HP N46 unit, compatible with an automatic transmission. This DME controller belongs to the Electronic control modules and controllers category and is responsible for precise management of the gasoline engine's operation, fuel delivery, and communication with other vehicle systems. Thanks to its factory BMW architecture, it ensures consistency with the original electrical installation and the operating logic of the drivetrain systems.

Specifications and technical data

• SKU: 7557290-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7557290
• Substitutable numbers: 7557290, 12147557290, 7565301, 12147565301, 7561891, 12147561891, 7550867, 12147550867, 7550857, 12147550857, 0261201106, 0 261 201 106, 6981416, 61356981416
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and function of the DME controller

The presented engine control unit kit is intended for BMW 1 Series E87 and 3 Series E90/E91 models with the 129 HP N46 engine, in a configuration with an automatic transmission. As the central element of the gasoline engine management system, the DME oversees, among other things, the combustion process, cooperation with sensors, and auxiliary actuators, which translates into stable operation of the power unit under various load conditions.

The module is designed to work with gasoline fuel, ensuring that control algorithms are adapted to the characteristics of the N46 engine, its ignition maps, and thermal protection strategies. Proper communication with the automatic transmission allows for smooth gear shifts and correct torque management, which is important for both driving comfort and component durability.

Compatibility, replacement numbers, and system integration

As an item from the Electronic control modules and controllers group, this DME controller is associated with a specific OEM part number and a set of interchangeable numbers, which facilitates the selection of the correct module for a specific vehicle configuration. The presence of multiple reference numbers increases the range of compatibility within the BMW range, allowing the controller to be matched to various model years and equipment variants within the same engine family.

The module is designed for integration with the original BMW wiring harness, which enables installation in a near plug-and-play mode after appropriate software matching. Maintaining the factory standard of connectors and CAN/LIN communication protocols (in accordance with the vehicle architecture) promotes seamless cooperation with other onboard controllers, such as comfort modules, ABS, or safety systems.

Technical and operational characteristics

The DME controller in this kit is adapted for use with a gasoline engine, which means the application of maps and control strategies optimized for exhaust emissions, fuel consumption, and dynamics. Cooperation with the automatic transmission allows for:

• torque coordination during gear changes,
• reduction of jerking and unwanted drivetrain vibrations,
• adjustment of engine performance characteristics to the driving modes provided by the manufacturer.

As a used component, the controller comes from vehicle dismantling and is intended for reuse after proper coding or adaptation to a new car. This type of solution allows for an economical repair of the engine control system while maintaining the original BMW operating logic, which is particularly important in the case of advanced electronic systems.

Benefits of using an original BMW controller

Using an original DME module in BMW E87, E90, and E91 cars with the N46 engine ensures consistency with factory software and power unit operating parameters. This makes it possible to maintain the acceleration characteristics, throttle response, and idle stability intended by the manufacturer. The original controller architecture minimizes the risk of conflicts with other modules and limits the need for installation modifications.

For workshops specializing in the BMW brand and users who care about maintaining the proper operation of the drivetrain, a used DME controller represents a reasonable compromise between repair cost and maintaining factory functionality. This solution allows for restoring correct engine operation after an electronics failure, without the need to use replacements of uncertain quality.

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 controllers, comfort modules, or transmission controllers, check out the available parts in the BMW electronic control modules and controllers category.

Additional materials and technical knowledge

When working with advanced premium vehicle electronics, it is worth using reliable sources of knowledge regarding the preservation of brand character and the role of original modules. You can find more about how properly selected used electronic components help maintain the factory properties of premium class cars in the article Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?, which clearly demonstrates the importance of original modules in modern designs.