Turbocharger Mercedes X164 W212 W221 OM642 Air Intake Pipe Inlet A6420901742

Turbocharger Mercedes X164 W212 W221 OM642 Air Intake Pipe Inlet is an original intake system component designed for precise measurement of intake air mass in OM642 engines. Accurate airflow reading is crucial for proper fuel metering, stable engine operation, and maintaining optimal exhaust emission parameters. By choosing this component from the Air intake and fuel sensors group, you are opting for factory fitment and predictable engine performance in daily operation.

Specifications and technical data

• SKU: A6420901742-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6420901742
• Substitutable numbers: A6420901742, A 642 090 17 42
• Category: Air Intake & Fuel Sensors

Function of the mass air flow sensor in the OM642 engine

The mass air flow sensor in Mercedes OM642 family engines is responsible for continuous, accurate measurement of the air volume drawn into the intake manifold. Based on this data, the engine control unit (ECU) determines the fuel dose, corrects the injection timing, and manages auxiliary systems such as exhaust gas recirculation or turbocharging. A properly functioning sensor translates into:

• stable idle speed and smooth acceleration,
• correct throttle response,
• maintenance of factory combustion and emission parameters,
• reduced risk of the engine entering limp mode.

Thanks to this, the fuel supply and intake system operates in a predictable manner, and the OM642 unit maintains its characteristic refinement and flexibility.

Compatibility and fitment for Mercedes models

The offered mass air flow sensor has been designed for use in Mercedes vehicles equipped with the OM642 engine, including the popular X164, W212, and W221 body series. This ensures the preservation of factory geometry of ports, connectors, and mounting points, which facilitates installation and minimizes the risk of leaks in the intake system.

To confirm compatibility with a specific vehicle version, it is recommended to verify via the OEM number or VIN in the manufacturer's catalog. This approach helps avoid electrical and software compatibility issues and ensures proper cooperation with the existing engine control unit.

Performance characteristics and benefits of using OEM parts

Choosing an original mass air flow sensor from the Air intake and fuel sensors group allows you to maintain engine operating parameters consistent with the specifications of Mercedes engineers. In practice, this means:

• signal consistency with factory ECU software requirements,
• proper cooperation with other sensors in the intake and fuel system,
• reduced risk of diagnostic errors related to airflow,
• easier diagnostics during future service inspections.

For the user, this means more predictable vehicle behavior, better engine refinement, and the ability to maintain stable, repeatable combustion parameters over the long term.

Condition, origin, and installation aspects

The offered item is a used part, sourced from a dismantled Mercedes vehicle. Such OEM components are frequently chosen by informed users who are looking for a reasonable compromise between repair costs and maintaining factory quality and fitment. The sensor is intended for installation in place of the factory unit, using the existing wiring harness and original mounting hardware.

Before installation, it is recommended to perform a standard check of the condition of connectors, seals, and intake hoses to rule out leaks that could interfere with airflow readings. A correctly installed sensor allows for the restoration of proper engine operating parameters without the need for ECU software intervention.

Technical support and selection of used electronics

The mass air flow sensor belongs to a group of electronic components where the consistency of markings, hardware versions, and software is of key importance. If you want to deepen your knowledge on the safe selection of used sensors and control modules, how to verify compatibility, and practical aspects of installation, check out our guide: Used automotive electronics – how to consciously choose ECU modules and sensors.

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

Additional information on how to optimize service costs while maintaining high-quality used parts is also provided in our practical guide: rising repair costs vs. the cost-effectiveness of choosing used OEM parts, which will help you better plan your budget for maintaining your Mercedes.