Intake Hose Mercedes W168 OM668 Air Intake Pipe Tube Hose Diesel A6680181082

Intake Hose Mercedes W168 OM668 Air Intake Pipe Tube Hose Diesel is a component from the Lines, hoses and pipes group, designed for the crankcase ventilation system in OM668 diesel engines. It is responsible for the safe discharge of oil vapors from the diesel power unit, which promotes stable engine operation and reduces contamination of the intake system.

Specifications and technical data

• SKU: A6680181082
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6680181082
• Substitutable numbers: A6680181082, A 668 018 10 82
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and function in the diesel engine system

The oil breather hose in the OM668 engine plays a key role in controlling crankcase pressure and managing oil vapors. A properly selected and sealed hose:

• stabilizes pressure inside the power unit,
• limits blow-by and uncontrolled oil vapor leakage,
• reduces the risk of contamination of the intake manifold and auxiliary components,
• supports smooth operation of the diesel engine, especially during long-term use.

For diesel units, the use of an appropriate breather hose is important not only for operation but also for maintenance – it facilitates the diagnosis of potential leaks and helps maintain the system in a predictable technical condition.

Benefits of using an original oil breather hose

In the case of the OM668 design, proper fitment of the breather hose is essential for maintaining factory operating parameters. Using a dedicated oil breather hose ensures:

• precise fit to the connectors in the engine system, without the need for modifications,
• proper hose routing geometry, which limits the risk of kinks and local restrictions,
• maintenance of the designed ventilation system flow, which is crucial for diesel engines,
• easier visual inspection for potential leaks or abrasions during service checks.

A component configured in this way helps maintain smooth operation of the power unit and also helps reduce excessive exhaust smoke resulting from improper oil vapor discharge.

Product characteristics and service application

The offered oil breather hose is a component intended for diesel engines, which means it has been designed with the specific operating conditions of a diesel in mind – elevated temperature, the presence of oil mist, and the pulsating nature of gas flow. In workshop practice, such a hose is primarily used in situations of:

• identifying cracks, abrasions, or leaks in the existing hose,
• excessive oil buildup around the breather and intake pipes,
• preventive replacement during major service of the OM668 unit.

By maintaining the correct cross-section and shape of the hose, the crankcase ventilation system can operate in a predictable manner, which translates into stable engine performance over a long period of operation.

Component condition and installation aspects

The product is in used condition, which in workshop practice means the possibility of an economical replacement while maintaining the functionality of the hose. Before installation, a standard visual inspection and adjustment to the existing engine accessory configuration are recommended to ensure proper positioning and lack of tension at the point of operation.

Because this is a component from the Lines, hoses and pipes group, its installation does not require interference with the vehicle's electronics – it comes down to proper connection to the appropriate ports and securing with clamps in accordance with the service procedure for the OM668 unit.

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 vacuum lines, cooling system hoses, or supply pipes, check the available parts in the Mercedes lines, hoses and pipes category.

Additional technical support for diesel engines

When working with diesel units, it is worth paying attention not only to the condition of the breather hoses but also to the condition of the fuel injection system components. For users who want to better understand the relationship between injector performance and the overall refinement of a diesel engine, an article describing the symptoms and consequences of injection faults may be helpful – you can find it here: Diesel injector faults – how to recognize them and the risks of neglecting them.