Mercedes SLK R172 250CDI OM651.980 204HP Engine Module ECU Kit A6519007401 Key

Mercedes SLK R172 250CDI OM651.980 204HP Engine Module ECU Kit is a solution designed for users expecting precise electronic matching for the OM651.980 204HP powertrain. This component from the Electronic control modules and ECUs category allows for the efficient replacement of a damaged engine management system while maintaining factory operating logic and performance parameters. Thanks to the integrated key, the kit facilitates the restoration of full vehicle functionality following an electronics failure.

Specifications and technical data

• SKU: A6519007401-5
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007401
• Substitutable numbers: A6519007401, A 651 900 74 01, A6519011801, A 651 901 18 01, A2129056801, A 212 905 68 01
• Category: ECUs & Computer Modules

Purpose and function in the powertrain

The presented engine control unit kit has been developed for the Mercedes SLK R172 250 CDI with the OM651.980 204HP unit. The ECU is responsible for advanced control of injection, turbocharging, auxiliary equipment, and monitoring key parameters of the diesel engine. A correctly selected module ensures stable engine operation, proper dynamics, and compliance with factory control maps.

The kit includes the engine control module along with the key, which facilitates integration with the immobilizer system and vehicle electronics. This solution reduces the risk of authorization issues and allows for a more efficient return of the vehicle to service after replacing a damaged controller.

Benefits of using an original Mercedes module

The original module from the Electronic control modules and ECUs category ensures full compatibility with the electrical architecture of the Mercedes SLK R172. Using a factory solution means:

• maintaining factory engine control strategies,
• proper cooperation with other controllers in the vehicle network,
• consistency with safety and comfort systems,
• easier diagnostics using dedicated service tools.

For workshops and users, this means predictable vehicle behavior after repair and the possibility of further service maintenance in accordance with manufacturer procedures. The ECU kit with key minimizes the need for deep interference with the immobilizer software, which shortens repair time and reduces the costs of additional programming services.

Condition characteristics and practical application

The product is offered as a used item, which is a cost-effective solution for users looking for verified electronics at a reasonable price. A used control module, selected for a specific engine and model configuration, allows for economical repair without sacrificing the original build quality characteristic of the Mercedes brand.

The kit will work well both in professional service centers specializing in the brand and in independent workshops dealing with diagnostics and repair of automotive electronics. The ECU kit with key is particularly useful in situations where the original controller has been damaged, there are communication problems in the vehicle network, or it is necessary to replace the module after flooding or a power surge.

Selection and integration with other modules

When selecting an engine controller for a Mercedes, it is crucial to match it to the specific version of the powertrain and the vehicle's electronic architecture. The offered kit has been prepared for the OM651.980 204HP engine, which facilitates the selection of the appropriate component for powertrain repairs in the SLK R172.

To better understand the specifics of working with used controllers, comfort modules, and sensors, it is worth reading the guide on our blog: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. The article helps to assess when used electronics are a reasonable choice and what to pay attention to when purchasing.

Expanding repairs within Mercedes electronics

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, management modules, or controllers working with the ECU, check the available parts in the Mercedes electronic control modules and ECUs category.

Summary

Mercedes SLK R172 250CDI OM651.980 204HP Engine Module ECU Kit is a practical solution for users and workshops that want to restore full engine control system efficiency while maintaining factory operating logic. Original Mercedes electronics, even in a used version, ensure high compatibility with the vehicle's installation, predictable operating parameters, and the possibility of further diagnostic support in accordance with manufacturer standards. Thanks to this kit, repairing a damaged controller becomes a more predictable and technically organized process.