Mercedes C140 CL420 M119 Crankcase Breather Vent Pipe Hose Line A1190901982

Mercedes C140 CL420 M119 Crankcase Breather Vent Pipe Hose Line is a specialized component of the crankcase ventilation system, designed for the M119 engine unit in the C140 chassis. It is responsible for the controlled discharge of gases from the engine compartment, which promotes stable engine operation and proper crankcase ventilation. By maintaining the factory geometry of the hose, it ensures proper routing of the medium within the engine bay without interfering with the original system.

Specifications and technical data

• SKU: A1190901982
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1190901982
• Substitutable numbers: A1190901982, A 119 090 19 82
• Part type: Hose
• Category: Hoses, Lines & Pipes

Purpose and function in the engine system

The offered hose belongs to the group of components responsible for engine ventilation, i.e., the controlled flow of gases from inside the engine unit to the intake system or exhaust gas treatment system. In the M119 engine, it plays a vital role in maintaining proper pressure in the crankcase, which reduces the risk of oil leaks, excessive smoke, and unstable idle operation.

A properly selected breather hose also helps keep the intake system clean, as it directs gases in the manner intended by the manufacturer, minimizing uncontrolled oil deposits in areas critical to airflow.

Design and fitment for Mercedes C140 CL420 M119

The hose has been designed as an element from the Lines, hoses, and pipes group, taking into account the specific routing of the installation in the engine bay of the C140 model with the M119 unit. The appropriate shape and working diameter allow for correct positioning relative to other components, such as the intake manifold, valve covers, or auxiliary equipment.

Such fitment limits material stress, reduces the risk of abrasion against adjacent components, and facilitates servicing – the hose can be removed and installed without the need to modify other sub-assemblies. For the user, this means predictable system behavior and compliance with factory service documentation.

Characteristics of the used component

The offered hose is a used component, which in practice means it comes from vehicle dismantling and has been verified for suitability for further operation. This type of part is a good choice when you want to maintain the original system specification while optimizing repair costs.

In the case of breather hoses, it is crucial that they maintain their tightness and proper flexibility in areas exposed to vibrations and temperature changes. A used component allows for restoring the proper operation of the ventilation system without the need to use replacements with uncertain geometry.

Service application and benefits of replacement

Replacement of the engine breather hose is recommended, among other things, for symptoms such as unstable idle speed, oil leaks around valve covers, excessive smoke, or a noticeable smell of exhaust and oil in the engine bay. Using the correct hose in the ventilation system allows you to:

• stabilize pressure in the crankcase,
• limit blow-by and uncontrolled oil leaks,
• reduce contamination of the intake system,
• improve the refinement of the M119 unit in the low and medium RPM range.

For workshops specializing in the Mercedes brand, this is a practical service solution that allows for maintaining consistency with the vehicle's factory design.

Product group and selection of 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 vacuum lines, cooling system hoses, or fuel system pipes, check the available parts in the Mercedes lines, hoses, and pipes category.

For drivers interested in a broader approach to vehicle maintenance and repair of sub-assemblies, guide materials may also be useful. In the context of selecting used electrical components and accessories, it is worth reading the article When is it worth replacing an alternator with a used one: a practical guide for drivers, which shows how to make conscious service decisions when choosing parts from the secondary market.