Mercedes W204 W212 Turbo Intercooler Hose Pipe OM642 Diesel A6421400687

Visual condition of the part

The product shows signs of use visible in the photos.

Mercedes W204 W212 Turbo Intercooler Hose Pipe OM642 Diesel is a specialized intake system component designed for diesel engines, which helps reduce airflow noise and stabilize the air stream. Thanks to its precise geometry and fitment to factory mounts in W204 and W212 models, it ensures consistent engine performance and proper cooperation with other intake components. This used part from the original production line is a sensible choice for servicing the air system in Mercedes diesel vehicles.

Specifications and technical data

• SKU: A6421400687
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421400687
• Substitutable numbers: A6421400687, A 642 140 06 87
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the intake system

The presented air silencer acts as a guiding and noise-reducing element in the diesel engine's intake system. The properly shaped pipe and air hose reduce unwanted turbulence, which promotes stable engine operation across the full load range. Using a dedicated air silencer instead of a worn or damaged part allows for the restoration of the factory acoustic and flow parameters of the system.

Benefits of using an original Mercedes component

The original Mercedes component from the Lines, hoses and pipes category ensures a proper fit to factory brackets, diameters, and connections with other intake parts. In practice, this means:

• secure seating of the hose without stress or leaks,
• maintenance of the airflow path designed by the manufacturer,
• reduction of vibration and noise transmission to the body,
• easier diagnostics of potential leaks in the future.

In the case of diesel engines, where boost pressures and air volumes are high, a properly selected air silencer and air hose are essential for maintaining airtightness and repeatable operating conditions for the turbocharger and accessories.

Characteristics of the used component

The offered air silencer and air hose is a used part, which in practice allows for economical repair while maintaining the original design. Such components, sourced from dismantling, are a popular choice when servicing older Mercedes W204 and W212 models, where reasonable maintenance costs are important while maintaining compliance with factory solutions. A used intake system component can also be a good choice if the existing hose has cracked, deformed, or shows signs of leaks at the joints.

Application in diesel vehicles

The product is intended for diesel-powered engines, where the intake system operates under significant pressure loads. In such conditions, a properly selected air silencer and air pipe help to:

• maintain the proper level of intake air noise,
• reduce vibrations transmitted to the body,
• limit the risk of connection leaks during load changes,
• ensure repeatable conditions for the turbocharging system.

As a result, the intake system remains consistent with the manufacturer's design assumptions, which promotes stable performance and engine refinement.

Intake system expansion and additional information

If you are planning a comprehensive repair or upgrade of the intake system area in your Mercedes and need other elements from the same group, such as lines, hoses, or air pipes, check out the available parts in the Mercedes lines, hoses and pipes category.

For users interested in a more conscious approach to service and the use of recycled parts to reduce their carbon footprint, a valuable addition to your knowledge will be the article Eco-tuning in practice: how to increase performance while reducing your carbon footprint with recycled parts, which shows how to combine operational efficiency with environmental care.