Mercedes W169 B150 M266.920 95HP Engine Control ECU A2661538979 Manual

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W169 B150 M266.920 95HP Engine Control ECU is a component from the Electronic control modules and ECUs category, designed to work with a petrol engine and a manual transmission. This solution allows you to restore the proper operation of the drivetrain, ensuring stable control of engine performance parameters in your Mercedes.

Specifications and technical data

• SKU: A2661538979-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661538979
• Substitutable numbers: A2661538979, A 266 153 89 79, A0024463140, A 002 446 31 40, 5WK90958
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The presented ECU is dedicated to the Mercedes A-Class W169 B150 model with the M266.920 95 HP engine, running on petrol and paired with a manual transmission. It is responsible for coordinating the operation of the powertrain, including fuel dosing, ignition, and monitoring key sensors, which translates into proper dynamics, smooth operation, and fuel efficiency.

As a component from the Electronic control modules and ECUs category, the ECU integrates with the vehicle's electrical system, working in conjunction with other onboard modules. This ensures consistent communication within the vehicle's network and proper support for diagnostic functions.

Benefits of using an original module

Using an original engine ECU dedicated to a specific drivetrain configuration allows you to:

• maintain the factory performance characteristics of the petrol engine,
• ensure compatibility with the manual transmission,
• maintain proper cooperation with the vehicle's diagnostic system,
• minimize the risk of communication errors between modules.

This solution is particularly recommended when replacing a damaged ECU after an electronics failure, starting problems, or unstable engine operation. Selecting a module compatible with the specific engine and transmission version reduces the need for additional wiring modifications.

Technical characteristics and vehicle integration

The ECU has been designed to work with a petrol fuel system, taking into account the specifics of the M266.920 unit. The module's software is adapted to the parameters of this unit, which allows for precise control of the combustion process and cooperation with sensors and actuators in the engine bay.

The version intended for a vehicle with a manual transmission takes into account the drivetrain logic characteristic of a manual gearbox, which is important for factors such as throttle response, idle speed control, and cooperation with safety systems.

Condition and service application

The offered ECU is in used condition, making it an attractive cost-effective alternative to new components while maintaining proper functionality. This type of module is suitable for both routine repairs and restoring vehicle performance after electrical system damage or engine electronics issues.

Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and consider any potential need for adaptation or programming in the vehicle, in accordance with the service procedures used by the Mercedes brand.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as additional controllers, management modules, or powertrain control systems, check out the available parts in the Mercedes electronic control modules and ECUs category.

Expert support and knowledge about electronic modules

When working with vehicle electronics, including engine ECUs, it is worth using reliable sources of knowledge regarding diagnostics, programming, and selecting dismantled parts. For a better understanding of how modern control modules work and the practical aspects of their replacement, you can read the article on our blog: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?. Although it concerns a different brand, it covers universal issues related to the operation and maintenance of advanced automotive electronics.