BMW F20 F30 LCI 118i 318i B38A15A 136HP Engine Unit ECU DME 8674265 Manual

BMW F20 F30 LCI 118i 318i B38A15A 136HP Engine Unit ECU DME Manual is an original electronic engine control unit designed for B38A15A 136HP petrol engines paired with a manual transmission. This specialized DME module ensures precise engine management, supporting stable operation, proper performance, and correct communication with other vehicle systems. Thanks to its factory design, the ECU is perfectly matched to the electrical architecture of BMW F20 and F30 LCI models, facilitating seamless integration with the vehicle's wiring.

Specifications and technical data

• SKU: 8674265
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8674265
• Substitutable numbers: 8674265, 12148674265, 8486839, 12148486839, 8648362, 12148648362, 8654454, 12148654454, 0261S16690, 0 261 S16 690, 6825541, 61356825541
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented controller belongs to the Electronic control modules and ECUs category and is responsible for comprehensive management of the petrol engine in BMW 1 Series F20 and 3 Series F30 LCI (facelift) models. The DME module controls, among other things, fuel injection, ignition, auxiliary equipment operation, and interaction with safety and comfort systems, ensuring consistent performance of the entire powertrain.

The version dedicated to manual transmissions is configured for specific torque management strategies and cooperation with the mechanical drivetrain. As a result, the controller supports smooth acceleration, predictable throttle response, and stable idling, which translates into driving comfort in daily use.

Compatibility and operating parameters

The DME module has been designed to work with the 136HP B38A15A engine used in 118i and 318i versions. This means its maps and control algorithms are tailored to the characteristics of this power unit, including specific parameters for the fuel injection, ignition, and turbocharging systems. Using the correct controller is crucial for maintaining factory performance, proper fuel combustion, and correct operation of OBD diagnostic systems.

As a component intended for a petrol engine, the ECU supports strategies typical for such units, including air-fuel mixture control, adaptive corrections, and cooperation with sensors specific to petrol supply systems. The manual transmission version also accounts for specific engine load conditions during gear changes, which improves driving smoothness and reduces jerking.

Practical application and installation benefits

Using an original DME controller to replace a damaged or unstable module allows for restoring proper powertrain operation without the need for interfering with the vehicle's electrical installation. In practice, this means:

• restoring proper engine starting and stable operation,
• correct cooperation with onboard systems such as ABS, DSC, or comfort modules,
• the ability to perform proper computer diagnostics and error code reading,
• maintaining the factory performance parameters of the power unit.

As a used component, the controller represents an attractive cost-effective solution while maintaining factory design and fitment for the specific vehicle configuration. In many cases, it is a reasonable alternative to new parts, especially during maintenance repairs or when restoring vehicle functionality after an engine electronics failure.

Selection, installation, and technical aspects

When selecting a DME controller for a BMW F20 or F30 LCI, it is crucial to match it to the engine type, fuel type, and transmission version. This ECU model is intended for a petrol unit paired with a manual gearbox, which must be taken into account during the repair planning stage. Proper selection is facilitated by the available part numbers and interchangeable numbers visible in the product's technical specification.

In most cases, installing such a controller requires performing appropriate programming or adaptation procedures in the vehicle to ensure full compatibility with the immobilizer and other modules. For this reason, it is recommended that installation and configuration be carried out by a workshop equipped with appropriate diagnostic software and experience in working with BMW electronics. A correctly selected and configured DME module allows for stable vehicle operation and reduces the risk of recurring faults related to the engine control system.

More solutions from this category and technical knowledge

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, powertrain management modules, or electronic controllers working with the ECU, check out the available parts in the BMW Electronic control modules and ECUs category.

If you are considering using a pre-owned engine controller or other electronic modules and want to better understand what to look for when choosing them, check out our guide The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, where you will find practical tips on selecting and using automotive electronics.