Intake Hose Mercedes W204 W212 OM642 Air Silencer Filter Pipe Diesel A6421403887

Visual condition of the part

The product shows signs of use visible in the photos.

Intake Hose Mercedes W204 W212 OM642 Air Silencer Filter Pipe is a component from the Lines, hoses and pipes group, designed for Mercedes diesel systems with the OM642 engine. It is responsible for the tight and stable routing of the medium between the filter and other components, which is crucial for the proper operation of the Diesel power unit.

Specifications and technical data

• SKU: A6421403887
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421403887
• Substitutable numbers: A6421403887, A 642 140 38 87, A6421403587, A 642 140 35 87
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and technical function

The described hose belongs to a group of components responsible for the controlled flow of air or exhaust gases within a diesel engine. In Mercedes vehicles with the OM642 unit, a correctly selected hose in the filter area influences:

• maintaining the appropriate pressure and direction of medium flow,
• stable operation of the intake or recirculation system,
• reduction of leaks and engine performance drops.

This type of solution is particularly important in modern diesel units, where any leaking section of the hose can cause controller errors, power loss, or increased fuel consumption.

Construction and fitment for Diesel systems

The hose has been designed with the specifics of Diesel engines in mind, which experience higher thermal and pressure loads than gasoline units. The construction of the hose is adapted to:

• operation in high-temperature environments within the engine compartment,
• compatibility with the factory filtration system and OM642 engine accessories,
• maintaining appropriate rigidity while ensuring installation flexibility.

Thanks to this, the hose can be integrated into the existing system without the need to modify other components, which facilitates service and reduces vehicle downtime.

Performance characteristics and benefits

Using a dedicated hose in the filter area of the OM642 engine allows for maintaining stable operating parameters of the power unit. Key benefits include:

• better system tightness compared to universal or makeshift components,
• preservation of the factory hose routing geometry, which limits the risk of rubbing against other elements,
• consistency with other components of the intake or exhaust gas recirculation system.

For the user, this means more predictable vehicle behavior, a lower risk of flow-related errors, and easier diagnostics of potential faults in the future.

Condition and service application

The offered hose is an aftermarket component, making it an attractive solution for maintenance repairs and restoring the efficiency of the system in older Mercedes models. This type of part is suitable both for typical replacement of a worn hose section and for comprehensive service of a diesel unit when it is necessary to restore the correct routing of all connections.

System expansion in the same category

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 additional lines, hoses, or auxiliary pipes, check the available parts in the Mercedes lines, hoses and pipes category.

Technical support and diagnostics

During service work within the engine compartment, it is worth paying attention to the general condition of cooperating systems, including the steering and power steering systems, which also affect driving comfort and safety. Additional information on the operating principle, typical symptoms of wear, and examples of aftermarket parts can be found in the article Steering and power steering system – how it works and what fails?.