X4XZ Front Engine Coolant Reservoir 603-382 for Ford Focus/Escape C‑Max Transit Connect — Translucent Direct-Fit

The X4XZ 603-382 front engine coolant reservoir is a direct-fit replacement expansion tank and cap designed to restore proper coolant recovery and visible level monitoring for compatible Ford models.

This replacement coolant reservoir (OE 603-382) and surge cap kit provides a durable, translucent storage tank for engine coolant overflow. Built from heat- and vibration-resistant plastic, the tank lets you check antifreeze level at a glance and returns excess fluid to the cooling system as temperatures change. It is intended as a non-OEM direct replacement for specified Ford vehicles—match part numbers before purchase.

Which vehicles is this X4XZ coolant reservoir compatible with?

This expansion tank is made to fit a range of Ford models from the reference OE and replacement part numbers listed. Fitment covers certain Ford Focus, Escape, C-Max and Transit Connect model years with the specified engine options. Always confirm compatibility by comparing the OE numbers (e.g., 8V618K218AE, CV6Z8A080A) with the part you are replacing.

• Ford Focus: 2012–2018 (1.0L / 2.0L / Battery EV variants)
• Ford Escape: 2013–2016 (1.6L)
• Ford C-Max: 2013–2018 (2.0L)
• Ford Transit Connect: 2014–2016 (1.6L)

How does the reservoir restore your cooling system’s performance?

The reservoir stores expanding coolant when the engine heats and returns it to the radiator as the system cools, preserving fluid levels and reducing air entry. Installing a sound expansion tank prevents low coolant symptoms like visible leaks and overheating trends due to lost fluid. While not an OEM part, this X4XZ unit is manufactured to match fit and function for a direct swap.

• Contains overflow coolant and releases pressure as temperatures rise
• Allows coolant to return to the radiator during cooldown
• Translucent plastic offers quick visual level checks without opening the radiator

What are the build features and materials of this replacement tank?

The tank is molded from heat-resistant plastic engineered to handle engine bay temperatures and vibration. The included surge cap seals the system under normal operating pressure and completes the kit for installation. Its lightweight, durable construction aims to provide a long service life when installed correctly by a qualified technician.

• Made from high-quality, heat- and vibration-resistant plastic
• Translucent body for easy antifreeze level monitoring
• Comes with a matching surge/cap for a complete replacement

What should you check before installing this X4XZ expansion tank?

Before installation, verify that the OE number on your old tank matches one of the listed replacements (603-382; 8V618K218AE; CV6Z8A080A; BE8Z8100A). Inspect hose connections, mounting points, and the radiator neck for compatibility. Installation instructions are not included; professional installation is recommended to ensure correct sealing and coolant system bleeding.

• Match exact OE/part numbers before ordering
• Check hose fittings, mounting tabs, and cap seal dimensions
• Have a professional install and pressure-test the cooling system

Who is this for: This X4XZ 603-382 expansion tank kit is suited for owners and mechanics seeking a cost-effective, direct-fit coolant reservoir replacement for compatible Ford Focus, Escape, C‑Max, and Transit Connect models. Choose this part if you need a visible, durable overflow tank with a matching surge cap to restore coolant recovery—confirm part numbers and consider professional installation for best results.