Mercedes W164 OM642 Diesel Engine Water Coolant Elbow Hose A1645060435

The Mercedes W164 OM642 Diesel Water Coolant Hose is a component from the Cooling System Hoses and Pipes category, designed for the rear section of the cooling system in diesel-powered vehicles. This is a used, original part that allows for a technically correct repair or restoration of the coolant circulation in Diesel engines.

Specifications and technical data

• SKU: A1645060435
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1645060435
• Substitutable numbers: A1645060435, A 164 506 04 35, BG
• Location on the vehicle: Rear
• Fuel type: Diesel
• Category: Hoses, Lines & Pipes

Purpose and Function of the Coolant Hose

The coolant hose in W164 models with the OM642 engine is responsible for the stable flow of coolant in the rear part of the system. A correctly selected hose ensures:

• maintaining the proper operating temperature of the diesel engine,
• efficient heat dissipation from critical areas of the engine,
• reducing the risk of overheating under heavy load and high ambient temperatures.

Thanks to its proper shape and fit for the specific OM642 engine configuration, the hose works with other cooling system components without the need for modifications or adapters.

Benefits of Using an Original Coolant Hose

An original water coolant hose for a Mercedes diesel engine offers a range of practical advantages in daily operation:

• Factory Geometric Fit – the hose is designed for a specific cooling system, which facilitates installation and minimizes the risk of leaks.
• Stable Operation at High Temperatures – the hose construction is prepared for the typical loads of diesel engines, including long-distance highway driving.
• Compatibility with Original Connectors – the hose works with factory-fitted spigots and clamps, simplifying servicing and reducing repair time.

This solution is particularly beneficial for users who want to maintain the cooling system's consistency with the manufacturer's original specifications and avoid problems typical of poorly fitting aftermarket parts.

Technical Characteristics for Diesel Engines

Diesel engines generate significant thermal loads, so coolant hoses must be resistant to variable pressure and temperature. The water coolant hose dedicated to the OM642 unit has been designed for:

• stable coolant flow at high torque,
• operation in turbocharged systems, where local temperatures are higher than in naturally aspirated engines,
• maintaining appropriate flexibility while resisting deformation.

Its placement in the rear of the vehicle requires proper routing of the hose in a tight installation space. Thanks to its factory profile, the hose does not interfere with other components and allows for safe routing of the cooling circuit.

Condition, Installation, and Service Application

The offered item is used, making it an attractive solution for users looking for an economical yet original-compliant part for their cooling system. In practice, this means the possibility of:

• restoring system tightness after the old hose has cracked or split,
• performing repairs in accordance with factory specifications without the need for cheaper, poorly fitting aftermarket alternatives,
• reducing service costs while maintaining correct engine operating parameters.

Installation in a professional workshop is recommended, using appropriate clamps and coolant that meets the vehicle manufacturer's standards. A correctly installed hose is an important element of preventative maintenance against engine overheating.

Technical Support and Additional Materials

If you are planning a comprehensive cooling system inspection for your Mercedes, it is also worth considering other Mercedes Cooling System Hoses and Pipes available in our offer – check the current selection using the link: Mercedes cooling system hoses and pipes.

Before installing a used coolant hose, it is advisable to familiarize yourself with practical tips regarding cooling system operation at high temperatures. Detailed information can be found in the guide: Summer Heat vs. Cooling System: Used Radiators and Fans Guarantee Savings, which describes how to maintain the efficiency of the entire cooling system to avoid costly breakdowns.