Mercedes W169 W245 Petrol M266 Engine Crankshaft Crank Shaft A2660310601

Mercedes W169 W245 Petrol M266 Engine Crankshaft Crank Shaft is an original crankshaft assembly component designed for M266 petrol engines used in compact Mercedes A-Class and B-Class models. Thanks to its factory-spec geometry and precise balancing, it ensures stable engine operation, correct transmission of combustion forces, and proper refinement across the entire rev range. This is the ideal solution for users looking for a proven crankshaft that meets factory specifications rather than unreliable aftermarket replacements.

Specifications and technical data

• SKU: A2660310601-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2660310601
• Substitutable numbers: A2660310601, A 266 031 06 01
• Fuel type: Petrol
• Category: Crankshafts

Purpose and compatibility with the M266 engine

The presented crankshaft belongs to the Crankshafts category and has been designed to work with the M266 petrol engine installed in Mercedes W169 and W245 models. The crankshaft design is tailored to the characteristics of the petrol unit, which translates into proper journal lubrication, adequate rigidity, and the maintenance of required operating clearances within the crank-piston system.

Selecting the right crankshaft is crucial for engine durability – proper fitment determines, among other things, even loading of the main and connecting rod bearings, reduction of torsional vibrations, and stable operation at idle and high RPMs. Using a component dedicated to a specific engine family allows for maintaining performance parameters consistent with the manufacturer's design.

Technical characteristics and role in the crankshaft system

The crankshaft in the M266 petrol engine is responsible for converting the reciprocating motion of the pistons into rotational motion transmitted to the transmission. In practice, this requires high precision in the manufacturing of main and connecting rod journals, proper balancing, and resistance to variable loads resulting from combustion cycles.

In this crankshaft model, the following are particularly important:

• stable guidance of the shaft within the engine block,
• maintaining the correct geometry of the journals for compatibility with bearings,
• resistance to material fatigue during long-term operation,
• maintaining proper interaction with the flywheel and drive accessories.

As a result, the crankshaft can operate under a wide range of loads, from calm city driving to dynamic acceleration, without excessive increases in vibration and noise.

Condition, verification, and use in repairs

The offered component is a used part and is intended for reinstallation following standard workshop inspection procedures. A used crankshaft of this type is a good choice for overhauling M266 petrol units when it is necessary to replace a damaged or excessively worn component while maintaining the factory design specifications.

Before installation, it is recommended to perform a detailed verification at a specialized service center, including checking radial runout, measuring journal diameters, and assessing the surfaces that interact with the bearings. Such an approach allows the crankshaft to be prepared for further operation in accordance with good repair practices and ensures trouble-free engine performance after the overhaul.

Benefits of using an original Mercedes crankshaft

Using an original crankshaft in the M266 petrol engine offers a number of practical benefits for the vehicle owner:

• Factory fitment – geometry and manufacturing parameters consistent with the manufacturer's design, which facilitates installation and clearance adjustment in the crank-piston system.
• Consistency with other engine components – the shaft works with original connecting rods, pistons, and the flywheel, reducing the risk of unwanted vibrations.
• Predictable engine behavior – maintaining engine performance characteristics close to factory standards, without surprises resulting from the use of random aftermarket replacements.
• Economical repair – a used component allows for reducing the cost of an engine overhaul while maintaining a high level of compliance with the original design.

Expanding repairs within the crankshaft system

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 additional shafts, mating parts, or components for other unit configurations, check the available parts in the Mercedes Crankshafts category.

If you are interested in a broader context of using used components in the automotive industry, including their potential application in tuning and repairs of German car brands, it is worth reading an article describing practical examples of such solutions: Audi on second-hand parts – tuning and repairs without loss of quality.