Mercedes Vito W639 651.940 116 CDI 163HP Engine ECU Kit A6511501879 Lock + Key

Mercedes Vito W639 651.940 116 CDI 163HP Engine ECU Kit Lock + Key is a complete, factory-spec engine control system designed for the diesel version with an automatic transmission. The kit belongs to the Electronic control modules and controllers category, which guarantees a precise fit with the vehicle's electrical architecture. This is a solution for users who want to restore proper engine operation while maintaining the original control logic.

Specifications and technical data

• SKU: A6511501879-8
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511501879
• Substitutable numbers: A6511501879, A 651 150 18 79, A0054469640, A 005 446 96 40, A6399002201, A 639 900 22 01, A0375456132, A 037 545 61 32
• Fuel type: Diesel
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine ECU kit

The presented ECU kit is responsible for the comprehensive management of the diesel engine in the Mercedes Vito W639 with 163 HP. As an Engine Control Unit, it coordinates, among other things, fuel dosing, boost control, accessory operation, and communication with other controllers in the vehicle. Using a dedicated controller for the automatic transmission version ensures consistency between gear-shifting strategies and the engine's performance characteristics.

Benefits of using an original Mercedes module

The original module from the Electronic control modules and controllers group ensures the preservation of factory engine operating parameters and full compatibility with the vehicle's electrical installation and CAN network. In practice, this means:

• stable engine operation across the entire load range,
• proper cooperation with the automatic transmission,
• preservation of factory injection maps and engine protection strategies,
• no need for adapting universal solutions or modifying wiring harnesses.

For workshops and users, this means faster diagnostics, predictable vehicle behavior, and the ability to use standard service procedures provided by the manufacturer.

Technical characteristics regarding the powertrain

The ECU kit has been developed specifically for the diesel engine paired with an automatic transmission. The controller accounts for the specifics of diesel engine operation, including injection system pressure control, torque management, and integration with safety and comfort systems. This makes it possible to maintain appropriate dynamics while controlling fuel consumption and exhaust emissions within the limits intended for the given model variant.

Application in service practice

The engine ECU kit is suitable both for replacing a damaged controller and for more complex powertrain repairs where maintaining the original vehicle configuration is required. The used component allows for an economical restoration of the vehicle's efficiency while maintaining consistency with Mercedes' factory electronic architecture.

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 auxiliary controllers, powertrain management modules, or additional control units, check out the available parts in the Mercedes electronic control modules and controllers category.

Technical support and part selection

When working with vehicle electronics, it is crucial to maintain the brand's original character and the correct integration of all modules. In the context of selecting and installing controllers, it is worth reading expert material describing the importance of factory components in preserving vehicle properties – you will find it in the article Audi and pure emotion. How do used parts help maintain the brand's DNA?, which well illustrates how important original electronic modules are, even in other premium brands.