Mercedes Vito W447 OM654 Vent Pipe Cylinder Head Breather Line Hose A6540101304

Mercedes Vito W447 OM654 Vent Pipe Cylinder Head Breather Line Hose is an original crankcase ventilation system component, designed for OM654 power units in Mercedes Vito/Viano W447 series models. The precisely engineered shape of the hose ensures stable gas discharge from the cylinder head, which promotes smooth engine operation and reduces the risk of unwanted leaks. Thanks to its factory-spec fitment, it is a convenient solution for installation and is technically safe for the fuel supply and lubrication systems.

Specifications and technical data

• SKU: rhd-A6540100312
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6540100312
• Substitutable numbers: A6540100312, A 654 010 03 12, A6540101304, A 654 010 13 04
• Category: Cylinder Heads

Function of the cylinder head breather hose in the OM654 engine

The cylinder head breather hose in the OM654 engine is responsible for the controlled discharge of gases from the under-cover area to the rest of the crankcase ventilation system. A properly selected component:

• stabilizes pressure within the cylinder head,
• limits the passage of oil mist into unwanted areas,
• supports the cleanliness of intake ducts,
• reduces the risk of leaks at connection points.

As a result, the system operates predictably, and the engine maintains proper performance parameters in the long term.

Benefits of using an original Mercedes hose

Using a component from the Mercedes brand allows for maintaining the factory routing geometry and the appropriately selected material flexibility. This translates into:

• secure fitment with the cylinder head connectors and the rest of the system,
• reduction of stresses resulting from engine operation,
• lower risk of abrasion and micro-cracks over a long period of use.

The original cylinder head breather hose is particularly important in diesel engines, where the stability of the crankcase ventilation system affects engine refinement, exhaust emissions, and intake cleanliness.

Application in the Cylinder Heads category

The presented hose is a component that works directly with the engine cylinder head, so its condition is significant for the tightness of the entire assembly. Replacing a worn hose with a functional component allows you to:

• reduce the risk of false air intake in the cylinder head area,
• maintain proper gas circulation in the ventilation system,
• limit oil contamination around the valve cover.

This is a practical solution for service work related to the cylinder head, such as adjustments, sealing, or intake system inspections.

Condition and installation aspects

The item comes from the used original parts group, which allows you to combine factory fitment with a more favorable purchase cost. The hose is designed for installation in place of the factory line, without the need for system modifications. During installation, it is recommended to:

• check the condition of the connectors on the cylinder head and the rest of the system,
• verify the clamps or other fastening elements,
• check for leaks after the first engine start.

Such an approach allows you to fully utilize the potential of the part and reduce the risk of subsequent leaks.

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 intake ducts, valve covers, or breather lines, check the available parts in the Mercedes Cylinder Heads category.

For users interested in improving the ergonomics and aesthetics of the cabin, while simultaneously optimizing service costs, the guide article Car interior tuning with Global Parts, which describes the practical application of used components in the vehicle interior, may be helpful.