Mercedes W163 Recirculating Pump Expansion Tank Hose Tube Line Pipe A1635013782

Mercedes W163 Recirculating Pump Expansion Tank Hose Tube Line Pipe is a component from the Cooling system hoses and pipes group, designed for use in Mercedes W163 series vehicles. It is responsible for the efficient connection between the recirculating pump and the expansion tank, which has a direct impact on the stable operation of the cooling system and the maintenance of the proper engine operating temperature.

Specifications and technical data

• SKU: A1635013782
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A1635013782
• Substitutable numbers: A1635013782, A 163 501 37 82
• Part type: Hose
• Category: Coolant Hoses

Function in the cooling system

The Mercedes W163 Recirculating Pump Expansion Tank Hose Tube Line Pipe operates within the coolant circuit, ensuring controlled flow of the medium between the pump and the expansion tank. A properly selected and leak-free hose reduces the risk of engine overheating, air locks in the system, and unwanted leaks that can lead to costly repairs.

Thanks to its tailored geometry and correct internal diameter, this component works with factory connectors and clamps, which facilitates installation and the maintenance of the appropriate operating pressure in the cooling system.

Selection and compatibility

The offered hose is intended for use in models from the Mercedes W163 family, where the cooling system utilizes a recirculating pump working with an expansion tank. When selecting the part, it is crucial to compare the shape, diameter, and routing of the hose with the element currently installed in the vehicle to maintain full compatibility with the factory installation.

The component should be installed in place of a worn or damaged hose, paying attention to the correct positioning relative to other engine bay components to avoid chafing, kinking, and excessive material stress during engine operation.

Condition and benefits of using a pre-owned component

The hose comes from dismantling, which allows for an economical repair of the cooling system while maintaining compliance with the vehicle's factory specifications. A used element of this type is particularly attractive for older generations of Mercedes vehicles, where the availability of new components can be limited or cost-prohibitive.

Choosing a verified hose from the secondary market allows for:

• maintaining the original geometry of coolant routing,
• preserving factory fitment to connectors and mounts,
• reducing service costs while maintaining system functionality.

Role in diagnostics and cooling system maintenance

During cooling system diagnostics, the recirculating pump expansion tank hose should be checked for cracks, material softening, signs of leaks, and deformations. Replacing a worn element with a properly selected hose helps restore stable coolant flow and reduces the risk of engine overheating, especially under heavy load or high ambient temperatures.

Regular inspection of this section of the cooling installation is particularly important in vehicles used for towing, off-road, or in city traffic, where the cooling system operates under an increased thermal regime.

Expanding Mercedes cooling system service

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 lines, flexible hoses, or sections connecting to the radiator, check the available parts in the Mercedes cooling system hoses and pipes category.

Technical support and parts from dismantling

When working on the cooling system, it is worth knowing best practices for selecting used components and inspecting them before installation. Practical tips on assessing the condition of elements, including components working with thermal systems, can be found in the article No cooling in the car: original used air conditioning compressor as a proven alternative to expensive new parts, which discusses when used OEM parts are a reasonable choice.

If you are interested in a broader approach to repairing older models using parts from dismantling, the entry No parts at the dealership? How to deal with repairing older models using parts from dismantling will also be helpful, showing how to effectively plan vehicle service when the availability of new elements is limited.