Mercedes-Benz A B W169 W245 M266 Petrol Engine Water Pump Pulley A2662050110

Mercedes-Benz A B W169 W245 M266 Petrol Engine Water Pump Pulley is a drive system component that works with Water pumps in petrol engines, used in selected Mercedes A-Class and B-Class models. The product comes from dismantling, which allows for an economical yet technically sound repair of the rear engine accessory drive zone.

Specifications and technical data

• SKU: A2662050110
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2662050110
• Substitutable numbers: A2662050110, A 266 205 01 10, BG
• Location on the vehicle: Rear
• Fuel type: Petrol
• Category: Water Pumps

Purpose and function of the pulley

The pulley is responsible for transferring torque from the shaft to the accessories working with the cooling system, including the water pump. In the presented variant, it is intended for installation in the rear part of the vehicle, in a configuration with a petrol engine, which is important when selecting for a specific version of the M266 power unit.

A properly selected pulley ensures stable operation of the drive belt, reduces the risk of slippage, and supports even loading of the water pump bearings. As a result, the cooling system can maintain the correct engine operating temperature, which translates into its durability and predictable performance under various operating conditions.

Compatibility with Mercedes A and B

The presented pulley is dedicated to selected configurations of Mercedes A-Class and B-Class models of the W169 and W245 generations with a petrol engine. This means that the geometry, offset, and mounting method are adapted to the factory design solutions used in these vehicles.

When selecting the component, it is worth paying attention to compatibility with the power unit and its placement on the vehicle. Proper fitment allows for maintaining the factory belt line, which minimizes accessory wear and reduces the risk of cooling system malfunction.

Product characteristics and installation

The pulley from this offer is a used part, which in practice means a favorable cost-to-functionality ratio while maintaining the original manufacturer's specification. For workshops and individual users, this is a solution that allows for restoring the efficiency of the water pump drive system without the need to resort to more expensive replacements.

Installation of the pulley requires standard service procedures: correct alignment relative to other pulleys, inspection of the belt condition, and verification of axiality. After installation, it is recommended to check the system's operation at idle and under load to confirm rotational stability and the absence of unwanted vibrations.

Mercedes water pumps – system expansion

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, impellers, or complete drive assemblies, check the available parts in the Mercedes water pumps category.

Technical support and selection by fuel system

When working with petrol engines, it is worth noting the connection between the cooling system and the fuel system – a stable engine operating temperature promotes proper injection and mixture combustion. For users who want to better understand the relationships between these systems and correctly select components by manufacturer markings, the following article will be helpful: Fuel system – injectors, pumps, and fuel tank: maintenance and regeneration.

Why choose a used pulley

Choosing a used pulley for a Mercedes A-Class or B-Class is a solution that allows you to reduce service costs while maintaining the original design. For repair and upgrade projects where conscious component selection matters, the guide on the secondary market may also be useful: Buying used car parts • Common mistakes when choosing tuning parts. This makes it easier to plan service work and avoid poor purchasing decisions.