Mercedes W168 OM668 Diesel Vent Pipe Engine Crankcase Breather Hose A6680100382

Mercedes W168 OM668 Diesel Vent Pipe Engine Crankcase Breather Hose is a precisely engineered component of the crankcase ventilation system for OM668 diesel engines. As part of the Lines, hoses and pipes group, it ensures stable routing of oil vapors and gases, which supports the proper operation of the power unit. This solution is dedicated to diesel engines, designed for durable and trouble-free operation.

Specifications and technical data

• SKU: A6680100382
• Mark: Mercedes (Genuine OE)
• Condition: New
• OEM Part Number: A6680100382
• Substitutable numbers: A6680100382, A 668 010 03 82
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function of the breather hose

The breather hose in the OM668 engine is responsible for the controlled discharge of gases from the crankcase to the intake system. A properly selected and sealed component:

• stabilizes pressure in the crankcase of a diesel engine,
• limits blow-by and uncontrolled oil vapor leaks,
• supports smooth and steady operation of the power unit,
• reduces the risk of contamination of intake components.

Thanks to this, the engine ventilation system maintains proper parameters, and the risk of failures related to hose leaks is significantly reduced.

Benefits of using a dedicated hose in the Mercedes W168 OM668

Using a breather hose matched to a specific power unit brings measurable operational results. In the case of the Mercedes W168 with the OM668 engine, the appropriate hose:

• ensures proper routing of the medium within the engine compartment,
• minimizes the risk of cracks and leaks typical for structurally mismatched components,
• facilitates installation by maintaining the original routing and geometry,
• helps keep the engine compartment clean by limiting oil vapor leaks.

This is particularly important in modern diesel units, where stable crankcase ventilation influences operating culture, exhaust emissions, and the durability of accessories.

Manufacturing quality and fit for the diesel system

The breather hose designed for the OM668 engine has been developed with the specifics of diesel units in mind. The diesel system generates different thermal and pressure loads than gasoline engines, which is why the correct selection of the hose is crucial for:

• resistance to temperature and pressure pulsations,
• maintaining tightness over a long period of use,
• stable operation of the oil vapor recirculation system.

Thanks to this, the component from the Lines, hoses and pipes group can operate in the demanding environment of a diesel unit, maintaining its properties for a long time.

Professional installation and operation

To fully utilize the potential of the breather hose in the Mercedes W168 OM668, it is recommended to install it in accordance with the vehicle manufacturer's service procedures. In practice, this means:

• checking the condition of the connectors and connection sockets before installation,
• checking the patency of the entire ventilation system,
• verifying tightness after installation with the diesel engine running.

A properly installed breather hose reduces the risk of unstable idle speed, oiling of intake components, and unwanted leaks in the area of the power unit.

System expansion – related components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other components from the same group, such as flexible vacuum lines, cooling system hoses, or pipes carrying working media, check the available parts in the Mercedes lines, hoses and pipes category.

If you are interested in a broader context of selecting parts for vehicles of other brands and want to better understand when the use of used components is technically justified, an article describing practical examples and selection criteria may be helpful – you can find it here: Volkswagen – solidity and reliability. Why are used VW parts a reasonable choice?.