Water Pump Pulley Mercedes W202 W210 R170 Petrol Engine M112 2.0 2.3 A1112020410

Visual condition of the part

The product shows signs of use visible in the photos.

Water Pump Pulley Mercedes W202 W210 R170 Petrol Engine M112 2.0 2.3 is an original component of the engine accessory drive system, designed for the M112 engine family. This used pulley from this series ensures factory-fitment for the water pump and proper cooperation with the accessory belt, which translates into stable operation of the cooling system. This is a solution for users who want to maintain the original technical specification in their Mercedes W202, W210, and R170 models.

Specifications and technical data

• SKU: A1112020410
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1112020410
• Substitutable numbers: A1112020410, A 111 202 04 10
• Fuel type: Petrol
• Category: Water Pumps

Purpose and function of the pulley

The presented pulley operates in the system driving the water pump in M112 petrol engines with a capacity of 2.0 and 2.3. Its task is to stably transfer torque from the crankshaft through the accessory belt to the water pump, which enables proper circulation of coolant in the engine.

Selecting an original pulley for a specific power unit is crucial for:

• proper routing of the accessory belt,
• maintaining correct tension in the system,
• preserving the factory geometry of the water pump drive.

Compatibility with Mercedes models

The pulley has been designed to work with M112 petrol engines mounted in popular Mercedes C-Class W202, E-Class W210, and the R170 roadster models. Using an original component from this group allows for maintaining structural consistency of the cooling system and avoiding problems with improper belt alignment or dimensional incompatibility.

Thanks to this solution, the user receives a component that is structurally matched to a specific generation of engines and bodies, which facilitates installation and limits the risk of additional modifications.

Technical characteristics and advantages of use

As an element from the Water pumps group, the pulley directly affects the efficiency of the pump and the stability of the entire cooling system. Choosing an original, used component of this type is a compromise between cost and maintaining the parameters intended by the vehicle manufacturer.

Key benefits of using this pulley:

• maintaining the factory routing line of the accessory belt,
• reducing the risk of belt slippage thanks to a properly selected working surface,
• compatibility with the original water pump used in M112 engines,
• possibility of use in the process of repair or modernization of the cooling system without interfering with the engine structure.

Condition of the element and service application

The offered pulley is a used element, which makes it an attractive solution for servicing older Mercedes models, where the priority is to maintain the original specification at reasonable costs. This type of component will work well both for standard replacement of worn water pump drive elements and for comprehensive maintenance of the cooling system in petrol engines.

It is always worth confirming the selection of the correct pulley for a specific vehicle unit based on catalog data or part numbers to ensure full compatibility with the used water pump and other accessory drive elements.

Cooling system expansion and parts selection

If you are planning a comprehensive repair or modernization of the engine area in your Mercedes and need other elements from the same group, such as pump housings, impellers, or additional drive elements, check the available parts in the Mercedes Water pumps category.

During service work within the petrol unit, it is also worth paying attention to the condition of the fuel supply system. Proper diagnostics and selection of components according to catalog numbers help to avoid operational problems – in this regard, the article Fuel system – injectors, pumps and fuel tank: maintenance and regeneration, which discusses practical methods of selecting parts by OEM numbers and the principles of their proper operation, will be helpful.