BDFHYK Engine Coolant Expansion Reservoir Overflow Tank

BDFHYK's Engine Coolant Expansion Reservoir is a direct-fit replacement overflow tank engineered for 2012–2018 Ford C‑MAX, Escape, Focus and select Transit Connect models to restore proper coolant level visibility and system performance.

This replacement coolant expansion tank provides OE-grade fit and function for compatible Ford vehicles, matching the referenced part numbers (603-382, CV6Z-8A080-A, 8V61-8K218-AE, FO3014109, FO3014110). Built from durable polypropylene, the reservoir restores the ability to monitor antifreeze without opening the radiator cap, reduces coolant system stress, and replaces worn, cracked or leaking factory tanks. The unit ships with installation guidance and is backed by BDFHYK's customer support.

How do I confirm this tank fits my vehicle?

Check compatibility by matching your car's year, make, model and the OE part number to the listed references. This tank fits many 2012–2018 Focus models and 2013–2018 C‑MAX, 2013–2016 Escape, and 2014–2016 Transit Connect variants that use the specified OE numbers.

• Compare your current reservoir's OE number to 603-382, CV6Z-8A080-A, 8V61-8K218-AE, FO3014109 or FO3014110.
• Verify vehicle year ranges: 2012–2018 Focus, 2013–2018 C‑MAX, 2013–2016 Escape, 2014–2016 Transit Connect.
• Consult photos or the vehicle repair manual if unsure about mounting and hose locations.

What materials and performance can I expect from this replacement reservoir?

The tank is molded from high-quality polypropylene (PP) designed for automotive under-hood use, resisting heat, coolant exposure and typical wear. It meets OE-grade expectations for fit, sealing surfaces and durability to help prevent leaks and coolant loss under normal operating conditions.

• Durable PP construction resists cracking and aging from engine heat.
• Transparent section allows quick visual antifreeze level checks without removing caps.
• Engineered mounting points and hose connections match OEM locations for straightforward replacement.

How does replacing the expansion tank help my cooling system?

A sound expansion tank restores proper coolant containment and helps maintain system pressure balance by giving coolant a safe reservoir to expand into as the engine warms. Replacing a damaged or leaking tank prevents coolant loss and reduces the risk of overheating related to low fluid levels.

• Prevents coolant leaks from cracked or brittle tanks.
• Restores accurate visual level monitoring to spot low antifreeze quickly.
• Helps maintain correct cooling system pressure when fitted with a proper cap.

Is installation difficult and does it include guidance?

The reservoir is designed as a direct replacement and typically requires basic hand tools and mechanical familiarity to install. BDFHYK includes detailed instructions in the package to assist with alignment, hose reconnection and mounting; professional installation can be chosen if preferred.

• Direct-fit design aligns with existing mounts and hoses.
• Instruction sheet included for step-by-step guidance.
• Basic tasks: drain small amount of coolant, remove old tank, swap hoses, secure new tank, refill and bleed according to vehicle procedure.

Who is this for: Owners and technicians replacing a cracked, leaking or discolored coolant expansion reservoir on compatible 2012–2018 Ford Focus, 2013–2018 C‑MAX, 2013–2016 Escape or 2014–2016 Transit Connect models. It's suited to DIYers comfortable with light engine-bay work and to repair shops seeking an OE-grade substitute backed by manufacturer support from BDFHYK.