Mercedes W164 W212 W221 Engine Oil Pump Lubrication Unit M273 Petrol A2731800101

Mercedes W164 W212 W221 Oil Pump M273 Gasoline is an original part from the Oil Pumps and Parts group, designed for M273 gasoline engines in selected Mercedes W164, W212, and W221 models. Thanks to its factory OEM design, the pump ensures proper lubrication of the powertrain, stable oil pressure, and safe engine operation across a wide range of loads.

Specifications and technical data

• SKU: A2731800501
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2731800501
• Substitutable numbers: A2731800501, A 273 180 05 01, A2731800101, A 273 180 01 01
• Fuel type: Petrol
• Part type: Oil Pump
• Category: Oil Pumps & Parts

Purpose and Compatibility

The presented oil pump is designed to work with the M273 gasoline engine, used in Mercedes W164, W212, and W221 models. The OEM design guarantees a perfect fit for the factory lubrication system, correct positioning in the engine block, and compatibility with the stock oil manifold.

This allows for installation without any modifications, and the lubrication system's operating parameters remain consistent with the manufacturer's specifications. This solution is particularly important for repairs of high-power units, where stable oil pressure is crucial for component durability.

Construction and Technical Function

The oil pump is responsible for drawing oil from the sump, filtering it within the system, and pumping it under the correct pressure to the lubrication channels for the crankshaft, camshafts, and other moving parts. For the M273 engine, a properly functioning pump is essential for maintaining a uniform oil film at higher RPMs and loads.

The original design ensures:

• stable oil pressure across the entire engine operating range,
• proper cooperation with the stock control system,
• adequate performance for a high-displacement gasoline engine,
• maintenance of factory tolerances and lubrication system sealing.

By using an OEM part, you minimize the risk of problems with insufficient lubrication, pressure drops, or accelerated wear of bearings and other sensitive components.

Benefits of Using an Original Oil Pump

Choosing an original oil pump for the M273 engine is a solution that technically and operationally surpasses random aftermarket replacements. You receive a part designed precisely for a specific engine type, maintaining factory flow and pressure parameters.

The main advantages of this solution include:

• maintaining the engine's original lubrication characteristics,
• better predictability of the powertrain's long-term operation,
• reducing the risk of costly failures due to insufficient lubrication,
• consistency with other components of the oil system.

This is particularly important in premium vehicles, where the engine often operates under higher loads, and the margin for error in lubrication is small.

Product Characteristics and Practical Application

The pump comes from the Mercedes offering, which means compliance with factory quality standards and manufacturing precision. The part is intended for gasoline engines, so its flow characteristics and design are tailored to the specifics of M273 units.

In practice, installing this pump is recommended in situations such as:

• overhaul or replacement of the M273 engine in W164, W212, W221 models,
• preventive replacement of the lubrication system at higher mileages,
• repairs following an oil pressure drop failure.

Using an original part allows for the restoration of correct lubrication system operating parameters and increases the operational safety of the powertrain.

Engine Area and Selection of Related Parts

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

More About the Advantage of Original Components

When repairing the powertrain, it's worth opting for proven, factory components that ensure predictable operation and better durability than random aftermarket parts. If you want to better understand why used OEM parts are often a more sensible choice than new but uncertain equivalents, read the article Noisy Differential? Find Out Why a Used OEM Drive Axle is a Better Investment Than an Uncertain Replacement.

If you are also interested in the ecological aspect and want to combine high technical efficiency with a reduced carbon footprint by using proven recycled parts, check out the post Eco-Tuning in Practice: How to Increase Performance While Reducing Your Carbon Footprint with Recycled Parts.