Mercedes W169 OM640 Diesel Turbo Oil Feed Line Pipe Hose Tube A6401800420

Mercedes W169 OM640 Diesel Turbo Oil Feed Line Pipe Hose Tube is an original lubrication system component designed for OM640 diesel engines. Thanks to its factory-spec fitment, the line ensures stable oil supply to the turbocharger, which translates into safe operation of the power unit. It is a practical solution for users who want to restore the correct operating parameters of the turbocharger in their Mercedes without unnecessary modifications.

Specifications and technical data

• SKU: A6401800420
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401800420
• Substitutable numbers: A6401800420, A 640 180 04 20
• Fuel type: Diesel
• Category: Oil Coolers & Lines

Purpose and function of the turbocharger oil line

The described line belongs to the Oil coolers and lines group and is responsible for delivering engine oil to the turbocharger in diesel power units. A properly functioning line minimizes the risk of insufficient rotor lubrication, which has a direct impact on turbocharger durability and boost pressure stability.

In the case of OM640 engines, the use of the correct oil line is particularly important due to the precise operating characteristics of the turbocharging system. This component allows for maintaining proper oil flow, supporting both lubrication and heat dissipation from critical points of the turbocharger.

Benefits of using an original Mercedes component

The turbocharger oil line dedicated to the Mercedes W169 with a diesel engine ensures:

• factory fitment to the OM640 engine lubrication system,
• preservation of the original routing geometry of the line in the engine bay,
• reduction of the risk of leaks and oil pressure drops,
• consistency with other components of the Oil coolers and lines group.

Thanks to this, the installation is predictable, without the need for system modifications, and the user gains reliable and repeatable turbocharger operating parameters.

Application in diesel engines

The component has been designed for diesel power units, where thermal and pressure loads are higher than in many gasoline engines. In such conditions, a properly selected oil line is crucial for:

• maintaining proper oil pressure within the turbocharger,
• stabilizing the temperature of rotating elements,
• reducing the risk of turbocharger seizure or overheating.

By choosing this line for your Mercedes W169 with an OM640 engine, you are investing in a technically consistent solution that supports long-term and predictable operation of the diesel unit.

Characteristics of the used component

The offered line comes from the used parts group, which allows for an economical repair of the turbocharger lubrication system while maintaining the manufacturer's original specifications. This type of component is particularly attractive for older Mercedes W169 models, where reasonable service costs are important while maintaining compliance with the factory design.

Related lubrication and cooling system 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 additional oil lines, oil return sections, or auxiliary lubrication system parts, check the available parts in the Mercedes oil coolers and lines category.

To better understand the relationships between the lubrication system, cooling system, and engine accessory durability, it is worth reading the guide on our blog: Summer heat vs. cooling system: used radiators and fans as a guarantee of savings. This will help you plan a consistent scope of service work for your car more easily.