Water Pipe Mercedes W204 OM642 Engine Cooling Radiator Coolant Hose A2045012982

The Mercedes W204 W212 OM642 Water Hose Pipe Tube is a component from the Cooling System Hoses and Pipes category, designed for Mercedes diesel engines of the OM642 family. It ensures efficient coolant flow within the system, supporting stable engine operating temperature and safe heat dissipation. This is a practical solution for users seeking a reliable cooling component for their diesel vehicles.

Specifications and technical data

• SKU: A2045012982
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A2045012982
• Substitutable numbers: A2045012982, A 204 501 29 82, BG
• Fuel type: Diesel
• Category: Coolant Hoses

Purpose and Role in the Cooling System

The presented water hose is designed to work with the OM642 diesel engine used in Mercedes W204 and W212 models. Its function is to stably guide coolant between cooling system components, such as the engine block, water circuit, and other parts responsible for maintaining the correct operating temperature.

A properly selected water hose reduces the risk of localized overheating, leaks, and decreased cooling efficiency, which directly impacts engine durability and driving comfort.

Benefits of Using the Mercedes OM642 Water Hose

Using a dedicated water hose in the cooling system offers several practical benefits:

• Improved Thermal Stability – proper coolant flow supports uniform heat dissipation from the diesel engine.
• Reduced Risk of Failure – a correctly fitted component lowers the probability of leaks and ruptures in the water circuit.
• Compatibility with Vehicle Design – the hose is prepared for operation within the Mercedes cooling system, facilitating installation and servicing.
• Cost-Effective Repair Option – replacing a single hose often allows avoiding more extensive interventions in the cooling system.

Application in OM642 Diesel Engines

OM642 diesel engines operate under significant thermal load, making a functional water hose crucial for their reliability. A properly working component:

• supports maintaining optimal operating temperature during city and highway driving,
• helps reduce the risk of overheating under heavy engine load,
• ensures correct coolant circulation throughout the system.

This makes the cooling system more predictable, and the diesel engine can operate under conditions close to factory specifications.

Component Condition and Installation Aspects

The offered water hose is a used part, allowing for an economical cooling system repair while maintaining compatibility with the solutions used by the vehicle manufacturer. Before installation, a standard check of its tightness, connection surfaces, and fitment to the specific OM642 engine configuration in the particular car is recommended.

Replacing the hose is a typical service task within the cooling system and can be performed as part of scheduled maintenance or when addressing issues related to coolant loss.

Cooling System – Additional Technical Information

A functional water hose is just one element of the entire cooling system. In case of overheating symptoms or unstable operating temperatures, it is worth consulting practical tips on diagnostics and repair, which you can find in the article: Engine Cooling System – Overheating, Repair, and Used Radiators. This will help you plan your service better and tailor the scope of work to the actual condition of your vehicle.

If you are also looking for other components from the Cooling System Hoses and Pipes category for this brand of car, check out the Mercedes cooling system hoses and pipes available in our store to select components tailored to your specific model and engine version.