BMW F22 F30 F32 220i 320i 420i Petrol N20 184HP ECU Kit DME 8631725 + Key + FEM

BMW F22 F30 F32 220i 320i 420i Petrol N20 184HP ECU Kit DME is an original electronic engine control module designed for 3 Series F30 and 4 Series F32 models equipped with the 184 HP N20 engine. This ECU provides precise engine management, ensuring stable operation, appropriate dynamics, and predictable fuel consumption. Thanks to its factory BMW design, it is a solution perfectly matched to the vehicle's electrical system, prepared for professional diagnostics and adaptation.

Specifications and technical data

• SKU: 8631725-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8631725
• Substitutable numbers: 8631725, 12148631725, 8664661, 12148664661, 8617551, 12148617551, 8626172, 12148626172, 8624820, 12148624820, 8639595, 12148639595, 8610635, 12148610635, 0261S10549, 0 261 S10 549, 61359352864, 9352864
• Fuel type: Petrol
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine computer is an element from the Electronic control modules and controllers group, responsible for coordinating the operation of the powertrain in BMW cars with the 184 HP N20 petrol engine. The module analyzes signals from sensors, controls fuel injection, ignition, and interaction with other onboard systems, which translates into predictable throttle response and correct operation across the full load range.

Due to its factory origin, the controller maintains compatibility with BMW's electronic architecture, which facilitates integration with the vehicle's wiring, bus communication, and subsequent configuration at a service center.

Benefits of using an original BMW module

Using an original engine computer in a BMW F30 or F32 with the N20 unit provides a number of practical advantages:

• preservation of factory engine operating parameters and power characteristics,
• proper cooperation with safety and comfort systems,
• possibility of full diagnostics using dedicated BMW software,
• consistency with the wiring harness and connectors used in the specific model year and trim level.

For workshops and users, this means a stable base for further configuration, coding, and potential software updates, without the need for compromise replacement solutions. The original engine controller minimizes the risk of communication issues between modules and facilitates future service maintenance.

Technical characteristics and integration with the N20 engine

The computer has been designed specifically to work with the 184 HP N20 petrol engine used in BMW 320i and 420i models. This means it is matched to specific injection maps, ignition timing, and engine protection strategies. The module takes into account requirements regarding exhaust emissions, operation in various temperature conditions, and cooperation with the vehicle's auxiliary systems.

In practice, this translates into:

• stable idle speed,
• smooth power delivery across the entire RPM range,
• monitoring of operating parameters for engine safety,
• possibility of adaptation after installation in accordance with BMW procedures.

Condition, origin, and service application

The module comes from dismantling and is offered as a used BMW engine controller, which is a cost-effective solution for electronics repairs in older vehicles. This type of component is particularly useful in cases of original ECU damage, communication problems, or errors that cannot be cleared through programming alone.

For professional workshops and service centers specializing in the BMW brand, this is a valuable base for performing repairs, data cloning, or adaptation to a specific car, in accordance with the manufacturer's procedures. Electronic control modules and controllers of this type allow for the restoration of full powertrain functionality without the need to invest in a new component.

Technical support and additional information

If you want to better understand how BMW engine controllers, FRM modules, or the iDrive system work, and learn how to safely use parts from dismantling in the 3 and 5 Series, check out the article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models. This is a practical source of knowledge for owners and service centers working with BMW electronics.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as engine controllers, comfort modules, or auxiliary system management units, check the available parts in the BMW electronic control modules and controllers category.