Mercedes W221 Crankshaft Crank Shaft Petrol M273 Engine A2730300701

Mercedes W221 Crankshaft Engine M273 Gasoline is an original part from the Crankshafts group, designed for gasoline-powered engines. It provides a solid foundation for professional repair or rebuilding of the M273 engine, ensuring the correct geometry of the crankshaft-piston system and stable engine operation.

Specifications and technical data

• SKU: A2730300701
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2730300701
• Substitutable numbers: A2730300701, A 273 030 07 01
• Fuel type: Petrol
• Category: Crankshafts

Technical Characteristics of the Crankshaft

The presented crankshaft belongs to the Crankshafts category and is dedicated to the M273 gasoline engine used in the Mercedes W221 model. The crankshaft's design is engineered for even load distribution, proper balancing, and stable operation at the speeds typical for this unit. Appropriately shaped main and connecting rod journals work with bearings, creating a precise lubrication and support system for the crankshaft.

Application in the M273 Gasoline Engine

The crankshaft in the M273 engine is responsible for converting the reciprocating motion of the pistons into rotational motion, which is then transmitted to the gearbox. The correct selection of this component is crucial for:

• maintaining correct oil pressure in the crankshaft system,
• preserving the axial alignment and concentricity of the crankshaft relative to the engine block,
• reducing torsional vibrations and engine noise,
• proper cooperation with pistons, connecting rods, and the flywheel.

Thanks to its compatibility with the M273 gasoline engine, the crankshaft ensures conformity with the factory crankshaft-piston system geometry and operating parameters specified by the manufacturer.

Condition and Preparation for Further Use

This part is a used item from disassembly and is offered as a used Mercedes crankshaft. This type of part is a good choice for engine overhauls where crankshaft replacement is necessary, and it's important to maintain the original manufacturer's specifications. Before installation, a standard workshop procedure is recommended, including checking clearances, measuring journal diameters, and selecting appropriate bearings according to service documentation.

Benefits of Using an Original Mercedes Crankshaft

Using an original crankshaft in the M273 engine allows for the preservation of the engine's factory operating parameters. The most significant advantages include:

• compliance with the manufacturer's design – proper fit with the block, connecting rods, and lubrication system,
• stable engine operation across the entire RPM range,
• the possibility of professional engine refurbishment without structural modifications,
• maintaining the operating characteristics typical for Mercedes gasoline engines from the M273 family.

For workshops specializing in Mercedes engine repairs, choosing such a component facilitates repair consistency and reduces the risk of compatibility issues.

Expanding Repairs within the Crankshaft System

When replacing the crankshaft, it's advisable to consider a comprehensive approach to overhauling the lower part of the engine, including checking connecting rods, pistons, bearings, and seals. If you plan a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as other crankshafts, components that work with the crankshaft, or crankshaft system components, check the available parts in the Mercedes Crankshafts category.

For more extensive repair work after a collision or breakdown, which also includes body and chassis components, a practical guide describing the selection and installation of used OEM components may be helpful – you can find it in the article Body and Chassis – Post-Collision Repairs Using Used Parts.