BMW F20 M135i F30 335i N55 326HP Engine Control Unit ECU DME 8674949 Automatic

Engine Control Unit (ECU DME) for BMW F20 M135i / F30 335i N55 326 HP (Automatic Transmission) is an original electronic control module designed for 326 HP N55 gasoline engines paired with an automatic transmission. This specialized component from the Electronic Control Units and Controllers category is responsible for precise engine management, ensuring stable performance and proper communication with other vehicle systems. Thanks to its factory design, the ECU DME is the right choice for professional repair or replacement of a damaged controller in sporty BMW 1 and 3 Series models.

Specifications and technical data

• SKU: 8674949-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8674949
• Substitutable numbers: 8674949, 12148674949, 8626472, 12148626472, 8626762, 12148626762, 8639582, 12148639582, 8624494, 12148624494, 8665279, 12148665279, 8621007, 12148621007, 8617384, 12148617384, 7540686, 12147540686, 0261S16757, 0 261 S16 757
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Intended Use and Function of the Engine Control Unit

The presented engine control unit is dedicated to the 326 HP N55 engine in BMW F20 M135i and F30 335i models, powered by gasoline and equipped with an automatic transmission. As the central ECU DME module, it manages key engine operating parameters such as fuel injection, ignition timing, and interaction with safety and comfort systems. A correctly selected control unit allows for the restoration of full powertrain functionality, eliminating issues with starting, uneven engine operation, or communication errors within the vehicle network.

Benefits of Using an Original ECU DME Module

Using an original engine control unit in BMW F20 M135i and F30 335i ensures high hardware and software compatibility with the vehicle's factory configuration. This enables:

• maintaining the correct operating characteristics of the 326 HP N55 gasoline engine,
• proper cooperation with the automatic transmission and onboard systems,
• preservation of factory protection strategies for the engine and auxiliary systems,
• easier diagnostics and programming using dedicated BMW service tools.

For workshops and users, this translates to stable powertrain operation and reduced risk of problems arising from incompatible aftermarket parts. The Original ECU DME Module is particularly recommended for high-performance vehicles where control precision directly impacts engine durability.

Selection by Part Numbers and Compatibility

This control unit belongs to a group of components for which selection by OEM number and interchangeable part numbers is crucial. In practice, this means verifying compatibility with the specific N55 engine version, equipment configuration, and transmission type. Proper matching helps avoid issues with coding, adaptation, and vehicle network communication.

To better understand the principles of selecting used electronic modules, including ECU DME, it is advisable to consult the guide prepared by Global Parts – it thoroughly discusses hardware and software compatibility, selection by VIN and OEM numbers, and practical aspects of installation. More information can be found in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?.

Characteristics of the Used Control Unit

The offered ECU DME module is a used part, sourced from disassembly, which represents a cost-effective solution while maintaining the original manufacturer's specifications. These types of control units are often chosen by workshops specializing in the BMW brand, as they allow for economical repairs without compromising factory quality. A Used Engine Control Unit is particularly attractive in cases of electronic failures in vehicles with more powerful engines, where new parts can be significantly more expensive.

Before installation, standard servicing procedures are recommended, such as verifying compatibility, potential programming, or immobilizer matching according to BMW procedures. A correctly performed installation process allows for seamless integration of the module with the vehicle's existing electronic architecture.

Expanding the Control System in BMW

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and require other components from the same group, such as additional controllers, management modules, or related electronic systems, check the available parts in the BMW Electronic Control Units and Controllers category.

For larger servicing or upgrade projects, involving not only the engine control unit but also other components, a guide describing how to efficiently source used parts from a single location and avoid problematic replacements can be helpful. Practical tips can be found in the material Comprehensive Sourcing: From Engine to the Smallest Clip – How to Assemble Used Car Parts in One Place?.