Mercedes W169 A150 95HP M266.920 Engine ECU Kit Lock 2 Keys Barrel A2661530891

Mercedes W169 A150 95HP M266.920 Engine ECU Kit Lock 2 Keys Barrel is a complete, used engine control set designed for a petrol unit paired with an automatic transmission. This is a solution for users who need a factory-matched electronic control module that ensures proper engine operation, stable parameters, and correct communication with other vehicle systems.

Specifications and technical data

• SKU: A2661530891-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661530891
• Substitutable numbers: A2661530891, A 266 153 08 91, A0024463140, A 002 446 31 40, 5WK90970, A1695451908, A 169 545 19 08, 1695451908, A1695452932, A 169 545 29 32, 1695452932
• Fuel type: Petrol
• Gearbox type: Automatic
• Part type: Engine Control Unit (ECU)
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented kit belongs to the Electronic control modules and controllers group and acts as the central component managing engine operation in the Mercedes A-Class W169 generation with the A150 unit. As an Engine Control Unit, it is responsible for processing sensor signals, controlling fuel injection, ignition, and coordinating with the automatic transmission to maintain proper dynamics, smooth operation, and fuel efficiency.

Benefits of using a complete ECU kit

Using a complete ECU kit in this Mercedes model helps reduce electronics matching issues and minimizes the risk of software conflicts between the engine controller and other modules in the vehicle. In practice, this means:

• consistent powertrain performance in a petrol + automatic configuration,
• easier adaptation in the vehicle compared to a single, unpaired controller,
• preservation of the factory operating logic of the M266.920 engine,
• the ability to restore proper starting and stable idle speed. For workshops and users, this means a more predictable installation process and a lower risk of needing additional software modifications.

Technical characteristics regarding the powertrain

This ECU kit is configured to work with a petrol engine and an automatic transmission. As a result, the control logic accounts for the specific operation of the automatic gearbox, including:

• coordination of engine torque with gear shift points,
• smoother gear changes during typical city and highway driving,
• appropriate management of engine load in comfort driving modes. Such matching is particularly important for vehicles where previous electronics issues manifested as jerking, uneven operation, or communication errors between modules.

Practical application and installation

The used ECU kit for the Mercedes W169 A150 is suitable both for replacing a faulty controller and for comprehensive engine control system repairs. In many cases, this is a more cost-effective solution than purchasing new electronics, while maintaining an appropriate level of reliability. Workshops specializing in the Mercedes brand will appreciate the ability to use the complete kit as a base for further vehicle configuration. To maximize the potential of this component, installation by a specialized service center equipped with appropriate diagnostic software and experience in working with this generation of control modules is recommended. If you are planning a comprehensive repair or upgrade of your Mercedes engine area and need other components from the same group, such as controllers, engine management modules, or electronic systems cooperating with the engine, check the available parts in the Electronic control modules and controllers Mercedes category.

Used engine controller – how to make an informed decision

Choosing a used ECU kit requires a practical approach – it is crucial to match it to the specific engine version, fuel type, and transmission type. A properly selected module allows for restoring full vehicle functionality without the need for costly replacement of all electronics with new ones. If you want to better understand when purchasing a used controller makes sense and what to look for when selecting one, check out our guide: A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

Summary

Mercedes W169 A150 95HP M266.920 Engine ECU Kit Lock 2 Keys Barrel is a practical solution for users and workshops looking for a complete, used petrol engine control system compatible with an automatic transmission. A properly selected and correctly installed kit allows for restoring the engine's proper operation, ensuring consistency with other vehicle systems and stable performance parameters.