Mercedes W176 A200 CDI OM651.930 136HP Engine Module ECU A6519009502 Manual

Mercedes W176 A200 CDI OM651.930 136HP Engine Control Module ECU A6519009502 Manual is an original engine control unit from the Electronic Control Modules and Controllers group, designed for a diesel engine with a manual gearbox. This solution allows for the restoration of proper powertrain operation, stabilization of engine operating parameters, and maintenance of factory performance characteristics.

Specifications and technical data

• SKU: A6519009502-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519009502
• Substitutable numbers: A6519009502, A 651 900 95 02, A6519010902, A 651 901 09 02, 28429192, A2469050802, A 246 905 08 02, A0999000400, A 099 900 04 00
• Fuel type: Diesel
• Gearbox type: Manual
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Purpose and Function of the Engine Controller

The presented ECU module is dedicated to Mercedes cars with a Diesel engine, specifically the A200 CDI version with the OM651.930 unit producing 136 HP, paired with a manual transmission. The controller is responsible for comprehensive engine management, including fuel injection control, combustion parameter regulation, and supervision of its interaction with other vehicle electronic systems.

By using an original module from the same ECU family, it is possible to maintain software and configuration consistency with the vehicle's factory settings, which translates to predictable car behavior, correct throttle response, and stable operation across the full range of loads.

Benefits of Using an Original ECU Module

Using an original engine controller in a Mercedes W176 A200 CDI offers a range of practical technical benefits:

• maintaining the engine's factory operating characteristics,
• proper cooperation with the manual gearbox,
• consistency with the vehicle's safety and comfort systems,
• diagnostics and adaptation capabilities using standard service tools.

After installation, the module must be properly coded and adapted to the specific vehicle, taking into account the equipment configuration and software version. Correct selection based on OEM and interchangeable part numbers helps minimize the risk of hardware or software incompatibility.

Application in Diesel Powertrains with Manual Transmission

The controller is designed to work with Diesel engines and manual transmissions, which is important for torque control logic, starting strategies, and driver assistance systems. Thanks to this, the ECU handles appropriate injection and boost maps, tailored to the specifics of the 136 HP OM651.930 unit.

In practice, this translates to:

• stable cold and warm starts,
• smooth torque delivery across the entire RPM range,
• proper cooperation with traction control and stability systems,
• maintenance of exhaust emission parameters in line with factory specifications.

Selection, Compatibility, and Installation Aspects

To ensure correct operation, it is advisable to verify the module's compatibility with your vehicle before purchase, based on the OEM part number and available interchangeable part numbers. VIN matching is also helpful, minimizing the risk of selecting the wrong hardware or software version.

Due to the nature of electronic components, installation and programming by a specialized service center or car electrician is recommended. They will perform:

• correct connection to the vehicle's electrical system,
• coding and adaptation of the controller to the specific car,
• verification of ECU memory for errors after installation,
• a test drive with current parameter readings.

Technical Support and Additional Information

If you want to better understand how to safely choose used engine control units and other electronic components, including selection principles based on VIN and OEM numbers, it is worth reading the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?.

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as controllers, management modules, or ECUs, check the available parts in the category Mercedes Electronic Control Modules and Controllers.