X4XZ Front Engine Coolant Reservoir Radiator Expansion Tank OE#603-382 — Translucent Direct-Fit with Surge Cap

The X4XZ Front Engine Coolant Reservoir Radiator Expansion Tank (OE# 603-382) is a direct-fit replacement coolant recovery tank and surge cap assembly designed to restore proper coolant overflow and pressure control for compatible Ford vehicles.

When the cooling system heats and cools, excess antifreeze needs a durable, visible place to expand into and return from — that’s the role of the expansion tank. The X4XZ tank replaces worn, cracked, or leaking reservoir tanks for selected Ford Focus, Escape, C-Max, and Transit Connect model years, offering a cost-effective aftermarket solution that matches OE fitment numbers. It arrives as a complete assembly (tank plus surge cap) made of translucent, heat-resistant plastic so you can check fluid level without removing the cap.

How does this reservoir tank restore a problematic cooling system?

Replacing a damaged expansion tank stops coolant loss, reduces air entry, and helps maintain correct system pressure. With a sealed surge cap and correct inlet/outlet placements, the tank allows expanding coolant to vent into the reservoir and return when the engine cools, preventing low-level warnings and reducing overheating risk due to loss of fluid.

• Direct replacement for OE# 603-382 and several cross-reference numbers.
• Translucent body lets you monitor antifreeze level at a glance.
• Includes surge cap to maintain proper pressure and seals.
• Manufactured from heat- and vibration-resistant plastic for durability.

Which vehicles and part numbers is this tank compatible with?

This X4XZ expansion tank is intended for specific Ford models and engine types; always confirm fitment against the original part number before ordering. It lists OE# 603-382 and replaces part numbers such as 8V618K218AE, CV6Z8A080A, and BE8Z8100A, among others. Use your vehicle’s fitment filter or compare the old tank’s numbers to ensure proper match.

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

What are the build quality and installation considerations?

The tank is molded from robust plastic engineered to resist heat cycles and engine-bay vibration; it’s translucent for level checks and supplied with a matching surge cap. This is an aftermarket direct-fit unit rather than a factory OEM part, so professional installation or guidance is recommended to ensure correct hose routing, secure clamps, and pressure integrity.

• Made from heat-resistant, lightweight plastic with molded fittings.
• Translucent finish for easy visual inspection of antifreeze level.
• Sold as a tank plus surge cap; hoses, clamps, and instructions not included.
• Recommended installation carried out by a qualified technician.

What support and warranty does X4XZ provide?

X4XZ backs this expansion tank with customer support and a limited product service period to address manufacturing defects or fitment concerns. If you run into issues during installation or discover a defect, contact customer service for troubleshooting, replacement, or warranty guidance.

• 24-hour customer service availability for purchase support.
• 1-year product service for defects and quality-related issues.
• Return or replacement options handled through X4XZ support channels.

Who is this for: The X4XZ Front Engine Coolant Reservoir Radiator Expansion Tank OE# 603-382 suits owners and technicians replacing a cracked, leaking, or missing coolant recovery tank on compatible Ford vehicles (Focus, Escape, C-Max, Transit Connect within the listed years). It’s ideal for drivers seeking an economical, direct-fit aftermarket replacement with visible fluid level monitoring and a supplied surge cap — particularly useful when the original tank shows signs of age, distortion, or failure. Always verify the original part number on your vehicle before purchasing and consider professional installation for best results.