BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine Control Unit ECU DME 8489450

BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine Control Unit ECU DME is an original module from the Electronic control modules and ECUs category, designed for advanced management of the B58 340 HP engine unit. This OEM solution ensures consistency with BMW's factory electrical architecture and stable powertrain operating parameters.

Specifications and technical data

• SKU: 8489450
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8489450
• Substitutable numbers: 12148489450, 8489450, 0261S19745, 0 261 S19 745, 61358781423, 8781423
• Category: ECUs & Computer Modules

Purpose and function of the DME control unit

The DME engine control unit in BMW M140i and M240i models with the B58 engine is responsible for precise control of the combustion process, fuel delivery, ignition timing, and communication with other vehicle systems. As an OEM component, it is designed for direct integration with the electrical installation of specific F20, F21 LCI, and F22 versions, allowing for the preservation of factory control strategies and safety logic. Thanks to its factory design, the module works seamlessly with sensors, the wiring harness, and other vehicle control units, ensuring consistent operation of systems responsible for performance, engine refinement, and safety. This is particularly important in high-performance turbocharged units, where parameter stability has a direct impact on component durability.

Advantages of using an original BMW module

Choosing an original DME control unit for a BMW with a B58 engine offers a number of practical benefits:

• preservation of factory engine characteristics and predictable vehicle behavior,
• full compatibility with the vehicle's communication bus and other modules,
• possibility of proper diagnostics using standard BMW service tools,
• no need for electrical installation modifications or connector adaptations. For users considering the installation of a used control unit, a guide describing selection by OEM numbers, hardware and software compatibility, and typical installation procedures will be useful – you can find it in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Characteristics of the used control unit

The offered control unit comes from the used OEM modules segment, which in practice means a beneficial combination of factory build quality and an attractive purchase price. Such components are frequently chosen for post-accident repairs, electronics damage due to flooding, or failures resulting from ignition system overload. In the case of engine control units, it is crucial to match them according to equipment version, body generation, and the engine unit used. Using an original module from the same family helps reduce the risk of communication problems, vehicle network errors, or malfunctions of additional functions. To compare the advantages of OEM parts versus replacements, it is worth reading the guide material 5 reasons why a used OEM part is a better choice than a replacement.

Selection, compatibility, and vehicle integration

When selecting a DME control unit for a BMW F20, F21 LCI, and F22 with a B58 engine, it is important to pay attention to:

• compatibility with the specific model version (M140i, M240i) and body generation,
• belonging to the same family of engine control units used in B58 engines,
• possibility of proper adaptation in the vehicle using appropriate service software. A properly selected module allows for the preservation of full functionality of driver assistance systems, safety systems, and comfort features that communicate with the engine control unit. As a result, after the adaptation is completed, the vehicle operates in a manner similar to the factory configuration, without the need for compromises in electronics performance.

Expanding BMW electronics upgrades

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