Vent Pipe Mercedes W169 W245 M266 Cylinder Head Breather Line Hose A2660180312

The Mercedes W169 W245 M266 Crankcase Ventilation Hose is an original component of the crankcase ventilation system, designed for M266 engines used in A-Class and B-Class models. The precisely selected geometry of the hose ensures proper oil vapor circulation, stable engine operation, and reduced contamination in the intake system.

Specifications and technical data

• SKU: A2660180312
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2660180312
• Substitutable numbers: A2660180312, A 266 018 03 12
• Category: Cylinder Heads

Purpose and Function of the Crankcase Ventilation Hose

The crankcase ventilation hose in the M266 engine is responsible for the controlled discharge of gases from the crankcase into the intake system, which directly impacts the smoothness of the engine's operation. Proper oil vapor flow limits the build-up of overpressure in the engine, reduces the risk of leaks, and helps maintain stable combustion parameters.

In Mercedes A-Class W169 and B-Class W245 vehicles, a functional crankcase ventilation hose is particularly important due to the compact engine bay. Leaks or deformations of this component can result in unstable idle speed, increased oil consumption, and accelerated carbon deposit buildup in the intake manifold.

Construction and Fit for M266 Engine

The offered crankcase ventilation hose comes from the Cylinder Heads group, meaning it is structurally related to the upper part of the engine and works with cylinder head and intake system components. The shape, connection diameters, and port layout are factory-matched to the M266 engine architecture, ensuring installation requires no modifications or adaptations.

Original manufacturing ensures the hose's proper flexibility, resistance to engine operating temperatures, and contact with oil vapors. Maintaining factory stiffness and geometry minimizes the risk of kinks, micro-cracks, and leaks that could disrupt the ventilation system's operation.

Benefits of Using an Original Crankcase Ventilation Hose

• Maintains correct crankcase pressure and stable operation of the M266 engine.
• Reduces blow-by and uncontrolled oil vapor ingress into the engine bay.
• Better integration with the intake system and cylinder head components, without the need for modifications.
• Decreases the risk of oil leaks caused by engine overpressure.
• Supports smooth idling and proper throttle response.

By maintaining the original hose parameters, the correct operation of the ventilation system can be effectively restored, leading to more predictable vehicle behavior in daily use.

Component Condition and Installation Aspects

The crankcase ventilation hose is offered as a used genuine Mercedes part, ensuring consistency with the factory engine construction. This type of part is a good choice for servicing M266 engines when the existing hose shows signs of wear, hardening, or leaks.

During installation, it is recommended to:

• inspect the condition of the connection ports near the cylinder head and intake system,
• check for leaks after installation, especially at connection points,
• verify engine idle operation after replacing the hose.

Expanding Service in the Engine Cylinder Head Area

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 ventilation channels, connection ports, or covers related to the ventilation system, check the available parts in the Mercedes Cylinder Heads category.

Technical Support and Vehicle Development

If you are simultaneously considering improving your car's performance and want to better understand the impact of engine equipment condition on tuning and engine characteristics, check out the guide: How to Increase Engine Power: A Practical Guide to Tuning Engines with Used Parts. This is a valuable addition to your knowledge when planning broader service and upgrade work.