Mercedes W169 W245 Engine Oil Pump M266 Engine Lubrication Unit A2661800351

Mercedes W169 W245 Engine Oil Pump M266 Engine Lubrication Unit is an original lubrication system component designed for gasoline engines, ensuring stable oil pressure and safe operating conditions for the power unit. Thanks to its factory design for the Mercedes brand, the pump works with the standard lubrication system, supporting the durability of the M266 engine and reducing the risk of seizure and overheating of moving parts.

Specifications and technical data

• SKU: A2661801201
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2661801201
• Substitutable numbers: A2661801201, A 266 180 12 01, A2661800351, A 266 180 03 51
• Fuel type: Petrol
• Category: Oil Pumps & Parts

Purpose and function in a gasoline engine

The presented oil pump belongs to the Oil pumps and parts category and has been designed to work with the M266 engine in the Mercedes W169 W245 body with gasoline power. It is responsible for the continuous circulation of oil in the lubrication system, maintaining appropriate pressure in the oil channels, and effectively dissipating heat from critical engine components.

Selecting a pump dedicated to a specific type of power unit allows for maintaining the correct operating parameters of the lubrication system, which translates into:

• stable oil pressure across the full RPM range,
• proper lubrication of bearings, the crankshaft, and the timing system,
• reduced wear of mating metal surfaces,
• increased engine resistance to thermal loads.

Technical characteristics and fitment

The pump has been constructed as a component that works with the factory Mercedes lubrication system, which facilitates installation in place of a worn or damaged part. Using an original solution for the M266 engine reduces the risk of fitment issues, leaks, or improper operation of the oil pressure regulating valve.

The product has a dedicated OEM part number and associated interchangeable numbers, which allows for precise verification of compatibility based on manufacturer identifiers. This makes it possible to safely select the pump for a specific engine configuration and vehicle year, minimizing the risk of errors when ordering online.

Condition, service application, and benefits of installation

The offered oil pump is a used component, which provides an attractive cost-effective solution while maintaining the original design and operating geometry. This type of part is suitable for both standard lubrication system repairs and comprehensive M266 engine overhauls in a Mercedes W169 W245, when it is necessary to replace several components at once.

Replacing the oil pump with a functional unit allows you to:

• reduce the risk of oil pressure drops when the engine is hot,
• limit noise resulting from insufficient lubrication,
• protect the power unit from costly damage,
• restore proper operating conditions of the lubrication system after an overhaul.

Part selection by OEM numbers and technical support

To correctly select an oil pump for a specific Mercedes vehicle, it is recommended to verify compatibility by the OEM part number and interchangeable numbers, as well as by vehicle data (model, generation, engine type). A detailed discussion of the differences between original, replacement, and used parts, along with a cost-effectiveness analysis, can be found in the article: Original, replacement, or used – which car parts are the most cost-effective?.

Additionally, if you want to deepen your knowledge on the safe selection of components by OEM numbers and avoid mistakes when shopping online, it is worth reading the guide: Online parts shopping without risk – 5 proven ways to verify component compatibility by OEM numbers and paint codes.

Expanding the lubrication system in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as pump housings, drive gears, or additional lubrication system components, check the available parts in the Mercedes oil pumps and parts category.