BMW F30 F31 LCI 340i B58 Petrol ECU Control Unit Module DDE 8689723 Automatic

BMW F30 F31 LCI 340i B58 Petrol ECU Control Unit Module is an advanced electronic control module designed for precise management of the powertrain. As a component from the Electronic control modules and controllers category, it is responsible for key processes related to fuel injection, ignition, and cooperation with the automatic transmission, ensuring stable and predictable operation of the drivetrain.

Specifications and technical data

• SKU: 8689723-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8689723
• Substitutable numbers: 12148692964, 8692964, 12148655735, 8655735, 12148664545, 8664545, 8689723, 0261S18459, 0 261 S18 459
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented controller is dedicated to the BMW 3 Series F30/F31 LCI (facelift) models with the B58 petrol engine and an automatic transmission. The module manages powertrain operating parameters in real-time, analyzing signals from sensors and coordinating interaction with other vehicle systems. This enables the maintenance of proper dynamics, smooth operation, and predictable response to driver inputs.

The controller acts as the central "brain" of the powertrain – it is responsible for data processing, fuel injection corrections, ignition timing, and interaction with the automatic transmission control system. A correctly selected and functional module allows for the preservation of factory engine characteristics and the stability of onboard systems.

Benefits of using an original module

Using an original controller in a BMW 3 Series with a B58 engine ensures:

• preservation of factory maps and powertrain control logic,
• proper cooperation with the automatic transmission,
• consistency with other electronic modules in the vehicle,
• reduced risk of communication errors within the vehicle network.

For the user, this means stable engine operation, predictable gear shifting, and the ability to perform further diagnostics and configuration using standard BMW service tools. In the event of replacing a damaged controller with a functional unit from the same group, the correct operation of the powertrain can be restored without interfering with the engine's mechanics.

Technical characteristics and vehicle integration

As an element of the Electronic control modules and controllers category, the controller is designed to operate in the demanding environment of the engine bay, taking into account thermal and vibration loads. The module's design features multi-pin connectors that enable communication with sensors, actuators, and other controllers in the vehicle via data buses.

The module works with systems responsible for safety and driving comfort, such as stability control systems, traction management, and adaptive gear-shifting strategies. This allows for precise adjustment of engine performance to current road conditions and the driver's style, while maintaining compliance with the manufacturer's factory specifications.

Product condition and service application

The offered controller is a used part, which allows for economical vehicle repair while maintaining original specifications. This type of module is particularly useful in situations where the existing controller has suffered electronic damage, water ingress, or communication issues within the vehicle network. Replacing it with a functional unit from the same family enables the restoration of proper engine and automatic transmission operation after performing the appropriate adaptation and programming procedures at a service center.

For workshops specializing in the BMW brand, such a controller is a valuable component for engine control system repairs, especially in modern B58 petrol units, where the precision of electronics has a direct impact on performance and operational smoothness.

Technical support and additional information

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, transmission management modules, or other ECU units, check the available parts in the BMW electronic control modules and controllers category.

To better understand how BMW engine controllers and other electronic modules work, it is worth checking out the service guide dedicated to iDrive systems, FRM modules, and powertrain controllers in the 3 and 5 Series – a detailed discussion can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models.