Mercedes W205 OM651 Diesel Oil Sump Suction Pipe Hose Line Strainer A6511804951

Mercedes W205 OM651 Diesel Oil Sump Suction Pipe Hose Line Strainer is a complete, used lubrication system assembly designed for OM651 diesel units. The set ensures proper oil intake from the sump, stable engine supply, and effective pre-filtration, which is crucial for the durability of the powertrain. This is a solution for users who expect a consistent, factory-spec design rather than randomly selected parts.

Specifications and technical data

• SKU: A6511804951
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511804951
• Substitutable numbers: A6511804951, A 651 180 49 51
• Fuel type: Diesel
• Category: Oil Sumps

Purpose and function in the lubrication system

The set, including the oil sump, suction pipe, hose, and strainer, is responsible for safely drawing oil from the bottom of the engine and delivering it to the pump. In a Diesel engine, thermal and mechanical loads are higher than in gasoline units, which is why a stable oil circulation is of particular importance for protecting the bearings, crankshaft, and turbocharger.

A properly selected oil sump with a matched suction pipe and strainer minimizes the risk of cavitation, interruptions in lubrication, and the suction of contaminants from the bottom of the sump. Using components from a single design group facilitates maintaining the correct oil level and preserving the factory flow geometry.

Set construction and key components

The set has been designed as an integral part of the lower engine section in Mercedes models with the OM651 unit. It includes components responsible for:

• collecting oil in the lower part of the block (oil sump),
• transporting oil to the pump (suction pipe and hose),
• pre-filtering larger contaminants (strainer).

This configuration allows for maintaining proper oil pressure across the entire RPM range while limiting the passage of contaminants to further parts of the lubrication system. Using the original Mercedes design promotes proper fitment with the engine block and other components.

Benefits of using an original oil sump with accessories

Choosing a complete oil sump set with a suction pipe, hose, and strainer instead of individual, randomly selected elements provides measurable service and operational benefits:

• Structural consistency – all components come from the same engine platform, which facilitates installation and reduces the risk of leaks.
• Better oil circulation control – the matched geometry of the sump and suction pipe promotes stable oil suction at various engine speeds.
• Reduced risk of seizure – a properly functioning lubrication system reduces the load on key diesel engine components.
• Diagnostic support – maintaining the original configuration facilitates work for service centers using the manufacturer's technical documentation.

Application in OM651 diesel engines

OM651 diesel engines used in the Mercedes W205 operate under high loads, often in mixed or highway cycles. In such conditions, the lubrication system must ensure a stable oil film even during prolonged driving at higher speeds. Using a complete oil sump with accessories helps maintain:

• the correct oil level in the sump during rapid acceleration and braking,
• proper operating conditions for the oil pump,
• consistency with factory oil flow parameters in the Diesel unit.

For users who use their car intensively or plan higher mileages, such a set is a sensible service solution that allows for maintaining predictable engine behavior.

Condition, installation, and service aspects

This item belongs to the Oil Sumps category and is intended for re-installation after standard workshop verification. Before installation, it is recommended to thoroughly clean the inside of the sump and the strainer, check the sealing surfaces, and use new gaskets in accordance with the vehicle manufacturer's recommendations. Properly performed installation reduces the risk of leaks and oil pressure drops.

During service work, it is worth paying attention to the condition of the oil pump, return lines, and the general condition of the lubrication system. A comprehensive approach to maintaining this area allows for extending the engine's service life and maintaining stable operating parameters in daily use.

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 sumps, discharge lines, or mounting elements, check the available parts in the Mercedes Oil Sumps category.

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