Mercedes A160 W169 M266.920 Engine Control Unit ECU A0024463140 Automatic

Mercedes A160 W169 Engine Control Unit ECU A0024463140 is a factory electronic control module designed for a gasoline engine paired with an automatic transmission. This component, from the Electronic Control Units and Controllers group, is responsible for precise engine management, ensuring stable driving characteristics and proper communication with other vehicle systems. A used ECU is a sensible service solution, allowing for a technically correct repair without the need to invest in a new part.

Specifications and technical data

• SKU: A0024463140-3
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0024463140
• Substitutable numbers: A0024463340, A0024463140, A2661530891, 5WK90954, A1695452932, A1695451908, A 002 446 33 40, A 002 446 31 40, A 266 153 84 79, A 169 545 29 32, A 169 545 19 08, BG
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

ECU Unit Purpose and Function

The presented engine control unit is designed to work with the gasoline engine in the Mercedes A160 W169 generation, specifically the M266.920 engine. As the central control module, the ECU analyzes signals from sensors, determines fuel injection, ignition timing, and operating parameters in conjunction with the automatic transmission. This ensures the powertrain maintains proper operation, and the throttle response remains predictable and consistent.

A properly selected engine control unit is crucial for:

• maintaining stable idle speed and smooth acceleration,
• proper cooperation with the automatic transmission,
• preserving factory fuel consumption and dynamic performance parameters,
• correct communication with other electronic modules in the vehicle.

Benefits of Using an Original Mercedes Module

Using an original Mercedes control unit ensures high hardware and software compatibility with the vehicle's electrical system. Such a module is designed for a specific engine and transmission configuration, minimizing the risk of startup issues, communication errors within the vehicle network, or incorrect operation of comfort functions.

Key advantages include:

• factory fit for the M266.920 unit – no need for universal solution adaptation,
• designed to work with an automatic transmission,
• preservation of original engine operating characteristics,
• diagnostics and programming using standard service tools for the Mercedes brand.

Performance Characteristics and Installation

As a used component, the ECU is intended for reinstallation after appropriate adaptation to a specific vehicle (coding, potential immo programming – according to service procedures). In practice, this means the possibility of restoring the engine control system's functionality in case of the original module's failure, without altering the powertrain's mechanics.

Depending on the car's configuration, installation may involve:

• physical replacement of the module in the engine bay or inside the vehicle (according to factory location),
• connection to the electrical system via factory connectors,
• adaptive procedures within the diagnostic system to ensure full communication with other control units.

With proper installation, you can achieve stable powertrain operation and reduce the risk of recurring engine electronics-related errors.

Selection by Numbers and Compatibility

This control unit belongs to a group of modules for which replacement numbers are available, facilitating the selection of the correct version for a specific vehicle year and configuration. When choosing an ECU for a Mercedes A160 W169, it is advisable to verify compatibility by OEM part number and reference numbers, and also consider the fuel type and transmission type to avoid compatibility issues.

For users and workshops looking to deepen their knowledge on purchasing and installing used control modules, a guide describing selection by VIN/OEM, hardware and software compatibility issues, and practical application examples will be useful – you can find it in the article Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.

Expanding the Control System in a Mercedes

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, engine management modules, or automatic transmission control units, check the available parts in the Mercedes Electronic Control Units and Controllers category.

This allows you to build a cohesive powertrain electronics set, based on components from a single brand, which simplifies diagnostics, servicing, and future vehicle operation. Choosing the right control modules directly impacts the powertrain's reliability and the car's predictable behavior in everyday driving.