Mercedes A207 W164 EGR Hose Pipe is an exhaust gas recirculation system component designed for Mercedes vehicles, ensuring proper exhaust gas flow between the EGR valve and other components. A used hose from the EGR Valves and Parts category is a solution for users seeking a technically matched part while maintaining reasonable service costs.
Specifications and technical data
- SKU: A6421401008
- Mark: Mercedes (Genuine OE)
- Condition: Used
- OEM Part Number: A6421401008
- Substitutable numbers: A6421401008, A 642 140 10 08
- Part type: EGR Tube
- Category: EGR Parts & Valves
Function and Role of the EGR Hose in a Mercedes
The EGR hose in the exhaust gas recirculation system is responsible for the controlled transport of exhaust gases from the exhaust manifold to the intake section, where they are redirected back into the combustion process. In Mercedes vehicles, its proper functioning affects:
- stable engine operation across the full load range,
- maintenance of appropriate exhaust emission parameters,
- reduction of nitrogen oxide formation by lowering combustion temperature,
- cooperation with the EGR system control electronics.
A well-chosen EGR hose minimizes the risk of leaks, power loss, and errors related to the exhaust gas recirculation system.
Why Choose an Original Mercedes EGR Hose
An original hose from the EGR Valves and Parts group is designed with specific powertrains and engine bay architecture in mind. This ensures:
- proper exhaust gas routing without unwanted turbulence,
- compatibility with factory mounting points and port diameters,
- system seal integrity under high temperature and pressure,
- reduced risk of collision with other engine bay components.
Using original components in the EGR system is particularly important due to its impact on engine performance, emission levels, and compatibility with the control unit software.
Used Condition – Practical Service Benefits
Choosing a used EGR hose is a solution that can reduce repair costs while maintaining compliance with factory specifications. This type of part is particularly attractive for older vehicle generations where maintaining technical functionality within an optimal budget is a priority. A used hose can be a good choice when:
- the existing part has suffered mechanical damage or a leak,
- a quick replacement is needed without long waiting times for a new part,
- compatibility with the existing EGR system configuration is important.
By retaining the original geometry and connections, installing such a hose is usually straightforward for an experienced mechanic.
Selection and Compatibility in the EGR Valves and Parts System
For an EGR hose to function correctly, it must be compatible with the installed EGR valve and other components of the intake and exhaust systems. In practice, this means matching the part to the specific Mercedes model and engine version. Verifying compatibility based on the vehicle's technical data helps avoid issues such as:
- incorrect hose routing in the engine bay,
- leaks at connections,
- incorrect readings from EGR-related sensors.
If you are planning comprehensive service of the exhaust gas recirculation system, it is advisable to consider simultaneous inspection of the EGR valve, exhaust gas cooler, and vacuum hoses to restore full system functionality in one go.
Related Categories and Technical Knowledge
If you are upgrading or servicing the exhaust gas recirculation system in your Mercedes and need other parts related to exhaust gas flow and its control, check available parts in the Mercedes EGR Valves and Parts category.
When working on fuel and exhaust systems, it is beneficial to understand the design differences between standard and sport versions, especially regarding performance, cooling, and thermal loads – this is discussed in more detail in the article Audi RS vs. Other Models – What Lies Under the Hood and Chassis?, which helps to better understand the relationships between power, brakes, chassis, and the selection of appropriate parts.
