Mercedes W169 A150 Petrol M266.920 95HP Engine ECU Kit A2661538479 Automatic

The Mercedes W169 A150 Engine ECU Key Immobiliser Set is a complete package of electronic components designed for the powertrain of the A-Class model, prepared for efficient engine control replacement. The set comes from the Electronic Control Units and Controllers group, which guarantees component consistency and their proper cooperation within the vehicle's installation. This is a practical solution for workshops and users who want to restore full functionality to the powertrain without the hassle of sourcing individual modules.

Specifications and technical data

• SKU: A2661538479-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661538479
• Substitutable numbers: A2661538479, A 266 153 84 79, A0024463140, A 002 446 31 40, A1695451908, A 169 545 19 08, A1695452932, A 169 545 29 32
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Set Purpose and Function

The presented set is dedicated to Mercedes W169 A150 vehicles equipped with a gasoline engine and an automatic transmission. The package includes the ECU engine control unit along with associated immobiliser components, such as the key and immobiliser, ensuring the integrity of the vehicle's security system.

This solution allows for the replacement of the complete engine control system in situations such as electronic damage, communication problems within the vehicle network, or errors preventing startup. The set ensures compatibility between the control unit, key, and immobiliser, significantly simplifying the installation and configuration process.

Benefits of Using a Complete ECU Set

Using a ready-made ECU set with a key and immobiliser in a Mercedes A-Class offers a number of practical benefits, especially for vehicles with automatic transmissions and gasoline engines. The main advantages include:

• consistency of electronic components responsible for engine starting and operation,
• reduced risk of immobiliser and key matching issues,
• faster repair process compared to programming individual modules,
• the ability to restore correct cooperation between the control unit and the vehicle's powertrain.

For workshops specializing in Mercedes, such a set provides a convenient, technically organised solution that allows them to focus on correct installation and final diagnostics rather than time-consuming coding of multiple separate components.

Technical Characteristics in the Context of the Powertrain

In gasoline engine vehicles with automatic transmissions, the engine control unit plays a crucial role in managing the unit's operating parameters and communicating with other modules, such as transmission control or safety systems. The ECU set with key and immobiliser is prepared to work with this specific type of drive configuration, which is important when selecting replacement parts.

In practice, this means that the control module takes into account the specific operation of the automatic gearbox, and its associated security components are factory-tuned for this configuration. For the user, this translates into stable engine operation, correct gear changes, and predictable vehicle behaviour in daily use.

Condition, Origin, and Service Application

The set comes from a dismantled Mercedes vehicle and is offered as a used part, providing an attractive cost alternative to new modules. For professional services and independent mechanics, this is a way to economically repair a vehicle while maintaining the original electronic architecture.

In practice, such a complete set is used, among other things, for:

• engine control unit failure resulting in the inability to start the vehicle,
• damage to the immobiliser system or problems with key recognition,
• the need to replace electronics after accident repairs.

Selection and Safety of Purchasing Used Modules

When choosing a used ECU set with key and immobiliser for a Mercedes, it is worth paying attention to compatibility with the specific engine version and gearbox configuration. It is helpful to use manufacturer markings and vehicle data to ensure full compatibility with the electrical installation and safety systems.

If you want to organise your knowledge on safely buying dismantled electronic parts and other components online, you will find practical tips in the guide Safe Purchase of Used Car Parts Online – Step-by-Step Guide, which discusses, among other things, selection by manufacturer numbers and part verification strategies.

Although the described blog article concerns iDrive systems and electronic modules in BMWs, many principles regarding working with electronics, diagnostics, and using dismantled parts are universal – you can learn about them by referring to the material Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models.

If you are planning a comprehensive repair or upgrade of the engine control area in your Mercedes and need other parts from the same group, such as control modules, gearbox controllers, or comfort controllers, check the available parts in the Mercedes Electronic Control Units and Controllers category.