Mercedes W169 W245 OM640 CDI Air Flow Mass Meter A0000942948

Mercedes W169 W245 OM640 CDI Air Flow Mass Meter is a component from the Air and fuel intake sensors group, responsible for the precise measurement of the air intake volume in the OM640 diesel engine. A properly selected mass air flow sensor allows for maintaining stable engine operation, the correct fuel dosage, and predictable performance, which translates into smoother operation of your Mercedes compact car or van.

Specifications and technical data

• SKU: A0000942948
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0000942948
• Substitutable numbers: A0000942948, A 000 094 29 48, KD
• Category: Air Intake & Fuel Sensors

The role of the mass air flow sensor in the OM640 engine

The mass air flow sensor in the OM640 engine measures the amount of air drawn through the intake system and transmits this data to the engine control unit. Based on this, the ECU determines the fuel dosage, injection timing, and auxiliary equipment operating strategy, which influences engine refinement, dynamics, and exhaust smoke levels. A functional sensor from this group helps to reduce typical signs of wear, such as power loss, jerking during acceleration, or unstable idle speed.

Benefits of using an original Mercedes sensor

Using a mass air flow sensor from the Mercedes range ensures a proper fit for the electrical installation and intake system in W169 and W245 models with the OM640 engine. An original component from this group of sensors is designed for specific ECU maps, ensuring that the air mass measurement characteristics are consistent with factory ECU settings. In practice, this means predictable vehicle behavior, easier diagnostics, and a lower risk of errors related to incorrect flow readings.

Selection by part numbers and compatibility

When selecting a mass air flow sensor for a Mercedes with an OM640 engine, it is crucial to match it by the OEM part number and interchangeable numbers, which helps avoid electrical and mechanical compatibility issues. It is worth ensuring that the sensor comes from the same engine family and is intended for the injection system used in the specific vehicle. As a result, installation is limited to replacing the component in the intake housing and connecting the factory wiring harness, without the need for any modifications to the installation.

Condition, verification, and practical application

The offered mass air flow sensor is a secondary market component, which allows for optimizing service costs while maintaining proper functionality. Before being reintroduced to the market, such sensors are typically verified for reading accuracy, signal stability, and the absence of mechanical damage to the housing and connectors. Replacing the mass air flow sensor in a Mercedes W169 or W245 with an OM640 engine is one of the most frequently performed service tasks in the event of power loss symptoms, which is why a well-selected element from this group provides real support in restoring correct engine operating parameters.

Technical support and additional information

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 boost pressure sensors, air temperature sensors, or other intake system components, check the available parts in the Mercedes air and fuel intake sensors category.

To better understand how to safely use used sensors and electronic modules, how to select them by OEM numbers, and what to pay attention to during installation, it is worth reading our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?