Peugeot 307 Coolant Expansion Tank Cooling Fluid Bottle Reservoir 9646903180

Peugeot 307 Coolant Expansion Tank Cooling Fluid Bottle Reservoir is a cooling system component responsible for maintaining a stable fluid level and compensating for its thermal expansion during engine operation. The offered reservoir belongs to the Expansion tanks category and is designed for use in Peugeot vehicles, ensuring proper cooling system performance and safe pressure relief.

Specifications and technical data

• SKU: 9646903180
• Mark: Peugeot
• Condition: Used
• OEM Part Number: 9646903180
• Substitutable numbers: 9646903180, BG
• Category: Expansion & Overflow Tanks

Function and role in the cooling system

The expansion tank in the Peugeot 307 plays a key role in maintaining the correct pressure and coolant level throughout the entire circuit. It is responsible for:

• compensating for fluid volume changes resulting from engine operating temperatures,
• stabilizing pressure within the cooling system,
• allowing visual inspection of the fluid level,
• safely discharging excess fluid in case of exceeding the permissible pressure.

Thanks to a properly selected expansion tank, the cooling system operates under predictable conditions, which helps maintain the appropriate engine temperature and reduces the risk of overheating.

Compatibility and identification parameters

The offered Peugeot 307 Coolant Expansion Tank Cooling Fluid Bottle Reservoir is part of the manufacturer's original solutions, which facilitates selection for a specific vehicle configuration. The component has an assigned OEM part number and interchangeable numbers, which allow for precise verification of compatibility with a given vehicle in service catalogs and parts selection systems.

Before purchasing, it is recommended to compare the markings with the vehicle documentation or the removed component to confirm full structural and mounting compatibility. This approach minimizes the risk of installation issues and ensures the reservoir works correctly with other cooling system components.

Performance characteristics and installation

As an element from the Expansion tanks category, the product is designed to operate under variable temperature and pressure conditions typical for internal combustion engine cooling systems. The reservoir design provides:

• connections matched to the factory cooling hose system,
• a seat for the pressure cap responsible for maintaining the correct operating pressure,
• a shape adapted to the Peugeot 307 engine bay, which facilitates installation in original mounting points.

Replacing the expansion tank is a standard service procedure performed in case of visible housing damage, leaks, or issues with maintaining fluid levels. A correctly selected component allows for restoring proper cooling system performance without the need for installation modifications.

Product condition and service application

The presented expansion tank is offered as a used part, which is a cost-effective solution for users looking for a functional alternative to new components. Such elements are often chosen for:

• maintenance repairs after identifying cracks or micro-leaks in the old reservoir,
• restoring cooling system efficiency after engine overheating,
• servicing fleet vehicles where reasonable maintenance costs are important.

Selecting a used expansion tank with the correct specifications allows for maintaining proper cooling system performance while keeping to a reasonable service budget.

Cooling system expansion in the Peugeot 307

If you are planning a comprehensive repair or upgrade of the cooling system area in your Peugeot and need other elements from the same group, such as additional reservoirs, mounting elements, or related components, check the available parts in the Peugeot expansion tanks category.

For drivers interested in a broader approach to safety and road visibility, including selecting lighting that works with a properly functioning electrical and cooling system, the guide article See more and better – a complete guide to selecting and replacing used LED and Xenon headlights, which discusses practical aspects of choosing original lighting components, may be helpful.