Mercedes W906 313CDi OM651.955 129HP Engine Unit ECU Kit A6519007902 Key Lock

Mercedes W906 313CDi OM651.955 129HP Engine Unit ECU Kit Key Lock is a set from the Electronic control modules and controllers group, designed for the Mercedes powertrain with the OM651.955 engine. The kit provides a coherent package of electronic and security components, allowing for professional engine control replacement while maintaining the integrity of the immobilizer system.

Specifications and technical data

• SKU: A6519007902-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007902
• Substitutable numbers: A6519007902, A 651 900 79 02, A6519019901, A 651 901 99 01, A9069003901, A 906 900 39 01, A0375456132, A 037 545 61 32
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented control kit is dedicated to Mercedes W906 series vehicles in the 313CDi version with the 129 HP OM651.955 unit. In one package, you receive key components responsible for managing engine operation and interacting with the start-lock system, which facilitates comprehensive engine electronics replacement in the event of a failure or the need to match a used engine.

As an item from the Electronic control modules and controllers category, the kit is responsible for processing sensor signals, controlling injection, monitoring powertrain operating parameters, and communicating with other modules in the vehicle, ensuring stable and predictable powertrain performance.

Benefits of using a complete kit

Using a complete ECU kit with key and lock allows you to avoid problems with immobilizer matching and reduces the risk of software conflicts between individual modules. In practice, this means:

• consistency of engine electronics and security systems,
• minimizing the need for advanced programming,
• easier diagnostics and configuration after installation,
• greater predictability of powertrain operation after replacement.

Thanks to this solution, the workshop or user receives a ready-made base for restoring full vehicle functionality after damage to the original engine controller or after replacing the powertrain with a structurally compatible one.

Technical characteristics and compatibility

The control module included in the kit was developed specifically for the 129 HP OM651.955 diesel engine used in the Mercedes W906 313CDi. This means that its control map, operating logic, and communication with the vehicle's installation are matched to the specifics of this powertrain, which translates into proper handling of injection, turbocharging, and engine protection systems.

The presence of assigned part numbers and interchangeable numbers (visible in the technical specification) facilitates precise compatibility verification by VIN or OEM numbers, which is particularly important when working with used electronics. This helps reduce the risk of purchasing an incompatible module and shortens vehicle downtime.

Condition, verification, and practical application

The product is offered as a used item, which allows for a significant reduction in repair costs compared to new components, while maintaining the functionality required for daily operation. This type of kit is particularly useful in situations where the original controller has been damaged, there are issues with the immobilizer, or an engine swap with electronics is being performed.

To maximize the potential of used electronics, it is worth paying attention to the compatibility of markings, hardware and software versions, and the correct installation procedure. A detailed discussion of these issues, along with practical examples of selection and installation, can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules 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 elements from the same group, such as additional controllers, auxiliary modules, or related electronic units, check out the available parts in the Mercedes electronic control modules and controllers category.

Selecting the right modules from this group allows you to build a coherent, stable powertrain management system, which translates into proper communication between the engine controller, safety systems, and the rest of the onboard electronics.