Crankshaft Mercedes W169 W245 A170 B170 M266.940 Petrol Engine A2660310701

Crankshaft Mercedes W169 W245 A170 B170 M266.940 Petrol Engine is an original component from the Crankshafts group, designed for M266 series petrol engines used in compact Mercedes A-Class and B-Class models. This used crankshaft allows for a technically sound and cost-effective repair of the power unit, while maintaining the engine's factory operating parameters.

Specifications and technical data

• SKU: A2660310701
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2660310701
• Substitutable numbers: A2660310701, A 266 031 07 01
• Fuel type: Petrol
• Category: Crankshafts

Purpose and compatibility

The presented crankshaft is dedicated to petrol engines installed in Mercedes A-Class W169 and B-Class W245 models in A170 and B170 versions with the M266.940 unit. Using an original crankshaft ensures proper cooperation with the engine block, the crank-piston system, and the lubrication system, which translates into stable operation and correct performance.

By maintaining factory geometry and manufacturing tolerances, this component allows for the restoration of the original operating conditions of the crankshaft in the petrol engine, minimizing the risk of torsional vibrations, excessive clearances, and uneven bearing loads.

Technical characteristics of the crankshaft

The crankshaft in the M266.940 engine is responsible for converting the reciprocating motion of the pistons into rotational motion transmitted to the gearbox. The design of the shaft is optimized for operation with petrol fuel, which means appropriately selected stiffness, balancing, and arrangement of main and connecting rod journals.

Key functional features of this component include:

• stable torque transmission in typical RPM ranges of A170 and B170 engines,
• compatibility with the original lubrication system and bearings,
• suitability for use in the process of comprehensive power unit regeneration.

Using an original crankshaft from this series allows for maintaining the factory engine operating characteristics, which is particularly important for precise adjustment of the fuel and ignition systems.

Condition, verification, and use in repairs

The component comes from dismantling and is offered as a used Mercedes crankshaft, which is a cost-effective solution while maintaining proper operational parameters. This type of part is particularly recommended for:

• engine overhauls after seizing or bearing damage,
• regeneration of a power unit with excessive journal clearances,
• restoring factory engine specifications after a mechanical failure.

Selecting a crankshaft dedicated to the specific M266.940 engine version reduces the risk of problems with balancing, improper journal fitting, or incompatibility with accessories, which directly impacts the durability of the entire crank-piston system.

Benefits of using an original Mercedes crankshaft

Using an original component from the Crankshafts group in a Mercedes petrol engine provides a number of practical benefits:

• preservation of the factory operating characteristics of the power unit,
• better cooperation with original connecting rods, pistons, and bearings,
• reduced risk of vibration and noise resulting from improper balancing,
• possibility of performing repairs in accordance with the manufacturer's technology.

For workshops specializing in Mercedes A and B-Class service, a used crankshaft dedicated to a specific engine version is a practical solution that allows for optimizing repair costs while maintaining high repair quality.

Repair expansion and technical knowledge

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 other shafts, components working with the shaft, or crank-piston system parts, check the available parts in the Mercedes Crankshafts category.

When planning an engine overhaul, it is also worth expanding your knowledge about typical faults and repair costs of various engine designs. The article comparing popular Volkswagen units may be helpful – Volkswagen 1.9 TDI vs 1.4 TSI – evolution of VW engines and repair costs – which shows how to consciously select used components for engine repair and optimize the service budget.