Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer

Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer is a specialized turbocharging system component designed for diesel engines of this series. As a part of the Lines, hoses, and pipes group, it is responsible for the proper routing of exhaust gases in the rear section of the vehicle, which promotes stable turbine operation and noise reduction. Using an original Mercedes component is a sensible choice for technically conscious repairs or upgrades of the diesel exhaust system.

Specifications and technical data

• SKU: A6681400387
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6681400387
• Substitutable numbers: A6681400387, A 668 140 03 87
• Location on the vehicle: Rear
• Fuel type: Diesel
• Offset (ET):
• Category: Hoses, Lines & Pipes

Purpose and function in the turbocharging system

The Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer operates in the rear area of the vehicle, where it is responsible for the controlled discharge of exhaust gases from the turbocharger. A properly selected element from the lines and pipes group:

• stabilizes exhaust gas flow behind the turbine,
• reduces the noise level generated by the exhaust system,
• supports the maintenance of appropriate backpressure,
• indirectly influences the refinement of the diesel engine's operation.

Thanks to its precise fit to the W168 design, the silencer works with other exhaust system components without the need to interfere with the system's geometry.

Compatibility with the diesel engine

The presented Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer is intended for diesel-powered vehicles, which is significant due to the specific operating conditions of diesel engines. The exhaust system in a diesel engine operates under different thermal and pressure loads than in gasoline units, which is why using the correct component:

• ensures appropriate resistance to temperature and exhaust pulsations,
• reduces the risk of leaks in the rear part of the system,
• maintains proper turbine operating conditions in the long term.

Selecting a component dedicated to a specific fuel type promotes predictable vehicle behavior and facilitates the diagnosis of potential future faults.

Installation characteristics in the rear section of the vehicle

The placement of the Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer in the rear part of the car requires maintaining proper routing of lines and pipes to avoid stress and excessive vibrations. A properly selected element:

• fits the factory layout of the W168 exhaust system,
• allows for installation using standard mounting points,
• limits the need for additional system modifications.

Such a solution shortens service time and makes it easier to maintain consistency with the vehicle's original design, which is important for both durability and subsequent technical maintenance.

Benefits of using an original used component

Choosing a used Mercedes-Benz A W168 OM668 Diesel Turbocharger Breather Hose Damper Silencer is a compromise between costs and maintaining the factory parameters of the system. Compared to replacements of uncertain origin, the original component:

• is designed for the specific W168 platform,
• maintains compliance with the factory geometry of lines, hoses, and pipes,
• facilitates diagnostics in service centers familiar with the manufacturer's standards.

For users planning long-term vehicle operation, such a solution allows for maintaining the consistency of the exhaust and turbocharging system with the manufacturer's design assumptions.

System expansion – related elements

If you are planning a comprehensive repair or upgrade of the exhaust and turbocharging area in your Mercedes and need other elements from the same group, such as additional lines, flexible hoses, or connecting pipes, check the available parts in the Mercedes lines, hoses, and pipes category.

To better plan service work on your vehicle, especially during periods of high temperatures, it is also worth reading the guide on the impact of heat on the cooling system – you will find practical tips in the article Summer heat vs. cooling system: used radiators and fans as a guarantee of savings.