Mercedes W203 W204 C209 W211 Oil Pump Flange M271 Petrol Engine A2710340203

Mercedes W203 W204 C209 W211 Oil Pump Flange M271 Petrol Engine is an original component from the Oil pumps and parts category, designed for M271 petrol engines in popular C-Class and E-Class models. This used OEM component ensures proper routing and stable supply for the lubrication system, which translates into safe operation of the power unit. It is a solution for users who are looking for a technically matched oil pump flange instead of universal replacements.

Specifications and technical data

• SKU: A2710300771-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2710300771
• Substitutable numbers: A2710300771, A 271 030 07 71, A2710340203, A 271 034 02 03
• Fuel type: Petrol
• Category: Oil Pumps & Parts

Purpose and role in the lubrication system

The oil pump flange in the M271 engine is responsible for the precise routing of oil within the pump and engine block, which is crucial for maintaining stable pressure throughout the system. In petrol units used in Mercedes C-Class (W203, W204) and E-Class (C209, W211), a correctly selected flange reduces the risk of pressure drops, excessive wear of timing components and bearings, as well as engine overheating. Using an OEM component allows for maintaining the factory oil flow geometry, and thus keeping the power unit's operating parameters in line with the manufacturer's specifications. This is particularly important in modern, high-output petrol engines, where the margin of tolerance for lubrication irregularities is small.

Benefits of using an original oil pump flange

Choosing an oil pump flange dedicated to the M271 engine in Mercedes W203, W204, C209, and W211 models brings a number of practical benefits:

• preservation of factory oil flow characteristics in the lubrication system,
• better compatibility with the original oil pump and oil channels in the engine block,
• reduced risk of leaks and seepage in the area of pump connections,
• reduced wear of mating components thanks to stable oil pressure,
• easier diagnostics and service due to maintaining the original part configuration. For workshops and private users, this means more predictable behavior of the power unit and the ability to maintain operating parameters close to factory standards. In the case of Mercedes petrol engines, this has a direct impact on durability and smooth operation.

Selection by OEM numbers and compatibility with the petrol engine

The M271 oil pump flange should always be selected based on the OEM number and compatibility with the specific version of the petrol engine. This helps avoid problems with installation, improper sealing, or incorrect positioning of the flange relative to the pump housing and engine block. Verification by catalog numbers is particularly important in the case of Mercedes units, where there are structural differences between individual variants. To facilitate the selection process and minimize the risk of error, it is worth using practical tips on checking part numbers. A detailed discussion of this procedure can be found in the guide Buying parts online without risk – 5 proven ways to verify component compatibility by OEM numbers and paint codes, which describes, among other things, the verification of components for Mercedes vehicles.

Practical application in service and repairs

This oil pump flange will work well both for standard replacement of worn components and for major repair work within the M271 engine. It can be used, among other things, during:

• regeneration or replacement of the oil pump,
• overhaul of the lower part of the engine (bearings, crankshaft),
• removing the effects of seizure resulting from insufficient lubrication,
• preventive replacement of lubrication system components at higher mileages. Thanks to the preservation of the original design, the flange allows for installation in a way that is predictable for the mechanic, without the need for modifications or adjustments. This translates into shorter working time and a lower risk of installation errors.

Expansion of 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, covers, or additional oil lines, check the available parts in the Mercedes oil pumps and parts category.