{"product_id":"x4xz-coolant-reservoir-tank-for-ford-fiesta-2011-2019-603-381-direct-fit-overflow-tank-with-cap-oe-equivalent","title":"X4XZ Coolant Reservoir Tank for Ford Fiesta 2011-2019 — 603-381 Direct-Fit Overflow Tank with Cap, OE-Equivalent","description":"\u003cp\u003e\u003cstrong\u003eThe X4XZ 603-381 coolant reservoir tank with cap is a direct-fit replacement overflow tank engineered for 2011–2019 Ford Fiesta 1.0L and 1.6L engines to restore proper coolant expansion and recovery.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf your Fiesta is losing coolant, running hotter than usual, or showing coolant level warnings, a worn or cracked overflow tank can be the culprit. The X4XZ 603-381 (OE-equivalent) is molded from durable plastics to match original dimensions and mounting points, making it a straightforward swap for the factory part numbers listed by Ford.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this tank maintain proper engine cooling?\u003c\/h3\u003e\n\u003cp\u003eThe reservoir provides a controlled place for excess coolant to expand into when the engine heats up and then returns coolant to the radiator during cooldown. That pressure-managed exchange helps stabilize coolant levels, minimize air ingress, and supports consistent heater performance without interfering with the sealed cooling system.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCaptures expanding fluid during thermal cycles to prevent radiator overflow.\u003c\/li\u003e\n  \u003cli\u003eReturns coolant to the system as temperature drops to preserve level stability.\u003c\/li\u003e\n  \u003cli\u003eHelps reduce the risk of air pockets and associated hot spots in the engine.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this unit fit my Ford Fiesta model and how do I confirm compatibility?\u003c\/h3\u003e\n\u003cp\u003eThe X4XZ reservoir is manufactured to match OE# 603-381 and replaces several Ford part numbers such as 8V218K218AB\/BE and BE8Z-8A080-A. Always cross-check your vehicle’s part number or use the online fitment tool to confirm fitment before ordering.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFits 2011–2019 Ford Fiesta 1.0L and 1.6L applications when matching OE numbers.\u003c\/li\u003e\n  \u003cli\u003eCompare printed part numbers or use the retailer vehicle-fit filter for verification.\u003c\/li\u003e\n  \u003cli\u003eProfessional inspection recommended if aftermarket modifications exist.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the build quality and installation notes?\u003c\/h3\u003e\n\u003cp\u003eConstructed from high-grade plastic, the tank is designed to meet or exceed original equipment form, fit and function standards. It ships with the filler cap and is sold as a single complete unit; however, installation instructions are not included, so have basic tools or a mechanic ready.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMade from durable materials to resist heat and vibration over service life.\u003c\/li\u003e\n  \u003cli\u003eIncludes the cap; hoses and clamps typically reuse from the vehicle unless damaged.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation recommended; ensure proper torque and hose connections.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat comes in the package and what support is available?\u003c\/h3\u003e\n\u003cp\u003eEach kit contains one coolant overflow reservoir tank and cap, ready for installation. X4XZ provides customer support and a one-year product service policy to address fitment or quality concerns after purchase.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePackage: 1 x coolant overflow reservoir tank with cap.\u003c\/li\u003e\n  \u003cli\u003eNo printed manual included; seek a professional installer for precise mounting.\u003c\/li\u003e\n  \u003cli\u003e24-hour customer service and one-year product coverage from X4XZ.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The X4XZ 603-381 reservoir tank is intended for Ford Fiesta owners and independent mechanics needing a reliable replacement for a cracked, leaking, or missing overflow tank on 2011–2019 1.0L and 1.6L engines. It's suited to drivers wanting an OE-equivalent part that restores coolant management, and to repair shops seeking a cost-effective, ready-to-install unit that meets factory fitment standards.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does this reservoir include the cap?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — the X4XZ 603-381 package includes the coolant reservoir tank with cap.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I install this myself on a 2014 Ford Fiesta 1.0L?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: If you have basic tools and experience, it's a straightforward swap, but professional installation is recommended.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"X4XZ","offers":[{"title":"Default Title","offer_id":48085019787422,"sku":"B0F5PVS76H","price":36.48,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/x4xz-reservoir-front-view_5f706e4b-c347-4805-b0dc-ab7dadb48a72.jpg?v=1785866863","url":"https:\/\/northtrailauto.ca\/products\/x4xz-coolant-reservoir-tank-for-ford-fiesta-2011-2019-603-381-direct-fit-overflow-tank-with-cap-oe-equivalent","provider":"North Trail Auto","version":"1.0","type":"link"}