BMW F80 M3 F82 F83 M4 S55 431HP Engine Module ECU DME Kit 8650701 Automatic

BMW F80 M3 F82 F83 M4 S55 431HP Engine Module ECU DME Kit is a specialized electronic control module designed for the 431 HP S55 unit, compatible with automatic transmissions. This item from the Electronic control modules and controllers group is responsible for the precise management of the gasoline engine, ensuring stable performance and proper communication with other vehicle systems. Thanks to its original design for BMW M3 F80 and M4 F82/F83 models, it serves as the perfect base for professional engine control system repair or replacement.

Specifications and technical data

• SKU: 8650701-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8650701
• Substitutable numbers: 8650701, 0261S12856, 0 261 S12 856, 9395173, 61359395173
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the DME controller

The presented engine computer is designed to work with the S55 gasoline engine with a stock output of 431 HP, used in the sports BMW M3 F80 and M4 F82/F83 models. As the central DME controller, it is responsible for:

• monitoring engine operating parameters in real-time,
• coordinating fuel injection and ignition in the gasoline engine,
• integration with the automatic transmission,
• data exchange with other electronic modules of the vehicle.

This ensures that the powertrain maintains proper dynamics, smooth operation, and consistency with the factory BMW M-series configuration.

Powertrain compatibility

The DME computer in this version is dedicated to vehicles with an automatic transmission and the S55 gasoline engine. This means that the control logic has been prepared for the specific requirements of the automatic gearbox, including:

• torque management during gear shifts,
• proper cooperation with the transmission control module,
• maintaining appropriate acceleration characteristics and throttle response.

Such matching is crucial when replacing a controller in high-performance cars, where the precision of communication between the engine and the transmission has a direct impact on component durability and the vehicle's predictable behavior.

Benefits of using an original BMW module

Choosing an original controller from the Electronic control modules and controllers group for the BMW M3/M4 allows you to maintain the factory characteristics of the S55 unit. The main advantages of this solution include:

• retaining stock engine control maps, consistent with the manufacturer's specifications,
• proper cooperation with safety and traction control systems,
• consistency with the electrical installation and the vehicle's CAN bus architecture,
• possibility of further diagnostics and programming using factory service tools.

For users expecting predictable car behavior and easy service maintenance, this is a technically safe solution that complies with BMW's design principles.

Product characteristics and service application

The offered module comes from the BMW segment and is a used part, making it an attractive cost-effective alternative while maintaining the original specification. It works well both for standard replacement of a damaged controller and for comprehensive powertrain rebuilding in M3/M4 models with the S55 engine. In workshop practice, such a DME computer is used, among other things, for:

• repairs after electrical damage or flooding,
• replacement of complete powertrain assemblies,
• restoring factory configuration after unsuccessful software modifications.

Due to the specific nature of engine controllers, installation and configuration by a service center experienced with BMW M-series electronics is recommended.

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

To compare how manufacturers approach maintaining the brand's character in the context of original control modules and accessories, it is worth reading an article describing how properly selected components influence the preservation of the vehicle's factory DNA – details can be found in the material Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.