Mercedes W169 A150 M266.920 95HP Engine ECU Kit Key Lock A2661536379 Automatic

Mercedes W169 A150 M266.920 95HP Engine ECU Kit Key Lock is a cohesive package of electronic components designed for vehicles with an automatic transmission and petrol engine. The set belongs to the Electronic control modules and ECUs category, which ensures structural compatibility with the factory electrical architecture of this model.

Specifications and technical data

• SKU: A2661536379-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661536379
• Substitutable numbers: A2661536379, A 266 153 63 79, A0014460340, A 001 446 03 40, 5WK90938
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and compatibility

The presented ECU kit with key and lock is dedicated to the Mercedes A-Class W169 generation in the A150 version with the 95 HP M266.920 unit. The module design is prepared for operation with a petrol engine and an automatic transmission, which allows for maintaining proper communication with other vehicle systems, such as the starting system, immobilizer, or transmission control.

By using an original controller with a complete set of immobilizer components, the risk of electronics matching issues is minimized, which is particularly important when replacing an ECU in modern vehicles with an extensive CAN network.

Function of the ECU, key, and lock kit

The set includes an engine control module along with the associated key and lock, which allows for the transfer of the entire ignition authorization system between vehicles. Such a set:

• ensures consistency between the engine controller and the transponder in the key,
• facilitates starting the vehicle after a failure of the original ECU or damage to the immobilizer,
• reduces the need for additional programming compared to replacing a single module.

For workshops and users, this means a faster installation process and greater predictability of the final result after replacing the electronics.

Technical characteristics and user benefits

As an item from the Electronic control modules and ECUs group, the set has been designed for precise management of the petrol engine's operation in both urban and extra-urban conditions. The controller monitors, among other things, fuel delivery, ignition, and cooperation with the automatic transmission, which translates into stable engine operation and correct gear shifting.

Key benefits of using this set include:

• starting system consistency – the ECU, key, and lock come from a single set,
• preservation of factory engine and automatic transmission control logic,
• possibility of restoring full vehicle functionality after an original module failure.

The product is used, which in workshop practice often represents a reasonable compromise between repair costs and maintaining the original vehicle specification.

Application in service practice

The ECU kit with key and lock will prove useful both in professional service centers and in specialized independent workshops dealing with Mercedes electronics. It enables:

• restoring a functional engine control system after a factory module failure,
• solving immobilizer problems without the need to build a system from scratch,
• reducing vehicle downtime in the workshop thanks to a ready-to-use set.

When selecting parts, it is worth verifying the vehicle configuration compatibility (fuel type, transmission type, model generation) to ensure proper cooperation with the existing installation.

More solutions and technical knowledge

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 controllers, engine management modules, or related electronic systems, check the available parts in the Mercedes electronic control modules and ECUs category.

If you want to better understand when choosing a used engine controller or other electronic module is justified, it is worth referring to the practical advice contained in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which helps in making informed service decisions and optimizing repair costs.