Mercedes W907 314CDI OM651.958 Engine Control Unit ECU A6519007103 Automatic

Mercedes W907 314CDI OM651.958 Engine Control Unit ECU Automatic is a specialized, factory-original module from the Electronic control modules and ECUs group, designed to work with the OM651.958 diesel unit in the automatic transmission version. This used control unit allows for a technically correct repair of the engine management system while maintaining the original electrical architecture of the Mercedes W907 314CDI vehicle.

Specifications and technical data

• SKU: A6519007103
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007103
• Substitutable numbers: A6519007103, A 651 900 71 03, A6519016002, A 651 901 60 02
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The engine control unit in the Mercedes W907 314CDI with the OM651.958 unit is responsible for precise management of the fuel injection system, turbocharging, exhaust gas control, and cooperation with the automatic transmission. Using a dedicated module ensures:

• consistency with the factory software and powertrain operating logic,
• proper communication with other modules in the vehicle's CAN network,
• stable engine operating parameters across the full load range.

As a result, this control unit is the right choice for professional repair or replacement of a faulty ECU in Mercedes W907 314CDI series vehicles.

Compatibility with automatic transmission

The presented module is configured to work with an automatic transmission, which is crucial for the proper operation of the entire powertrain. In practice, this means:

• maintaining correct gear shift points depending on load and driving mode,
• proper data exchange between the engine control unit and the transmission module,
• consistent operation of assistance systems, such as traction control or safety systems.

Selecting a control unit dedicated to the automatic version minimizes the risk of communication errors and adaptation issues after installation.

Product characteristics and service application

The offered item comes from a Mercedes vehicle and is an OEM class part, which helps maintain the original electrical configuration and engine operating parameters. A used control unit will prove particularly useful in situations where:

• the existing module has suffered electronic or software damage,
• ECU replacement is necessary as part of an advanced fuel system repair,
• the service aims to maintain the factory vehicle specification without using universal replacements.

In workshop practice, such a module allows for an economical yet technically correct restoration of the engine control system functionality.

Benefits of using an original control module

Using an original engine control unit in a Mercedes W907 314CDI OM651.958 brings a number of practical service and operational benefits:

• High compatibility with the vehicle's installation – factory connectors and electrical architecture facilitate installation and reduce the risk of compatibility issues.
• Stable engine operation – maintaining the parameters specified by the manufacturer promotes smooth engine operation and correct response to load.
• Integration capability with existing systems – the control unit works with other electronic modules of the vehicle, which is important for complex equipment configurations.

For workshops specializing in the Mercedes brand, such a module provides a solid foundation for further software configuration according to the requirements of a specific vehicle.

Mercedes electronic control modules and ECUs – expansion and service

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 accessory control units, check out the available parts in the Mercedes electronic control modules and ECUs category.

Technical support and working with used modules

When working with used engine control units, it is important to have the correct approach to programming, immobilizer adaptation, and integration with other vehicle modules. It is worth using the experience of structurally similar systems to optimize the service process. Practical tips on diagnostics, repair, and configuration of electronic control modules can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?, which discusses universal principles of working with used controllers and modules in modern cars.