BMW F20 F30 F32 LCI 120i 320i 420i Petrol B48 184HP Engine ECU Unit DME 9486260

BMW F20 F30 F32 LCI 120i 320i 420i Petrol B48 184HP Engine ECU Unit DME is a factory-original electronic control module designed for petrol engines paired with an automatic transmission. It enables precise management of the B48 engine, ensuring stable power characteristics, correct fuel dosing, and consistency with the vehicle's other electronic systems. By maintaining the original BMW architecture, this electronic control module serves as the ideal foundation for professional repair or replacement of a faulty ECU.

Specifications and technical data

• SKU: 9486260
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9486260
• Substitutable numbers: 9894912, 12149894912, 9486260, 0261S21000, 0 261 S21 000
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the DME unit

The presented DME unit is designed to work with the 184HP B48 petrol engine in post-facelift BMW 1 Series F20, 3 Series F30, and 4 Series F32 models. It is responsible for coordinating key engine operating parameters, such as injection timing, ignition, load control, and communication with other vehicle modules. The version intended for automatic transmission systems ensures seamless operation with the transmission mechatronics and driver assistance systems.

Benefits of using an original BMW module

Using an original DME unit to replace a damaged component allows for the preservation of factory engine control logic and compatibility with the vehicle's electrical system. This solution is particularly important in modern petrol engines, where precise control of engine operating parameters influences refinement, fuel consumption, and the correct operation of OBD diagnostic systems. A module from this group is also a beneficial choice for repairs where maintaining the original software and CAN bus architecture of the car is a priority.

Application in a powertrain with an automatic transmission

The ECU has been prepared for use with an automatic transmission, which is crucial for the proper functioning of features such as gear shifting under load, torque control, and interaction with stability control systems. A correctly selected DME module for a petrol version with an automatic transmission helps avoid communication issues between control units, dashboard errors, and irregular powertrain responses.

Product characteristics and practical application

The offered component comes from the Electronic control modules and ECUs category, meaning it is an integral part of the BMW powertrain management system. It is suitable both for standard replacement of a faulty ECU and for more complex engine system repairs where compliance with the factory vehicle configuration is required. The used nature of the product allows for an economical restoration of system performance without compromising on the original BMW design.

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as controllers, engine management modules, or DME units, check out the available parts in the BMW Electronic control modules and ECUs category.

Tips for selection and vehicle integration

When selecting a DME unit for a BMW F20, F30, or F32 LCI with a B48 petrol engine and automatic transmission, it is crucial to match it to the specific vehicle configuration and perform subsequent vehicle adaptation in accordance with service procedures. In practice, this means taking into account the car's equipment, engine version, and software to maintain full functionality of the onboard systems. A correctly selected module allows for the restoration of proper engine performance without interfering with the engine's mechanics.

To compare how manufacturers approach electronics and maintain brand character, it is worth reading an article describing how original modules influence handling and driving sensations in another premium segment: Audi and pure emotion. How do used parts help maintain the brand's DNA?.