Coolant Reservoir Overflow Expansion Tank With Cap For Ford Mondeo S-MAX

The Coolant Reservoir Overflow Expansion Tank with Cap is a precise, 100% NEW replacement designed for the Ford Mondeo and S-MAX cooling system. With OEM references tank 6G918K218AD and cover 3M5H8100AD, this expansion tank is built to match the original specifications while providing modern reliability. Originating from Mainland China, it delivers a straightforward, plug-and-play upgrade for your vehicle’s coolant circuit. Whether you need the full tank with cap or just the individual components, this part integrates with your existing setup to keep your cooling system sealed and efficient.

When the engine heats up, coolant expands and a healthy overflow reservoir is essential to prevent pressure spikes, coolant loss, and air getting into the system. This expansion tank helps maintain the correct coolant level, supports steady pressure within the cooling loop, and minimizes the risk of overheating. Replacing a damaged or cracked reservoir reduces the chance of leaks and helps maintain consistent engine temperature, protecting both heater performance and overall reliability.

Benefits & Tips

• Reliable replacement: Restores proper coolant storage and pressure management, reducing the likelihood of overheating under heavy loads or hot climates.
• Easy DIY maintenance: A straightforward swap for the Mondeo/S-MAX cooling system—verify the original tank’s shape and size for a precise fit.
• Versatile package options: Depending on your needs, you can receive the expansion tank with cap, the expansion tank alone, or the cap alone to complete your assembly.

Product Specifications

• Brand: NONE
• OE No (tank): 6G918K218AD
• OE No (cover): 3M5H8100AD
• Suitable For: FORD Mondeo S-MAX
• Condition: 100% NEW
• Origin: Mainland China
• Contents: 1 x Expansion Tank with Cover, or 1 x Expansion Tank, or 1 x Cover

Package Includes:

• 1 x Expansion Tank with Cover
• 1 x Expansion Tank
• 1 x Cover

Warnings / Reminders

• All our automotive parts pass strict factory quality tests. Before ordering, double-check compatibility with your vehicle to avoid fit issues.
• If unsure about fitment, examine your original part’s size and shape or send us a vehicle photo. Our team will help you confirm the right fit.

All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.

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