YOUYIEN Engine Coolant Reservoir Radiator Expansion Tank with Cap — Direct-Fit Replacement for Ford Explorer/Taurus (2008–2018), O

YOUYIEN Engine Coolant Reservoir Radiator Expansion Tank with Cap is a direct-fit replacement reservoir designed to restore coolant containment and pressure control for compatible Ford, Mercury, and Lincoln models.

This replacement expansion tank is molded from reinforced automotive-grade plastics to tolerate heat, vibration and pressure cycles found in modern engines. It replaces part numbers such as 603-364, AG1Z8A080S and FO3014136 and fits a range of Explorer, Police Interceptor, Taurus, Mercury Sable and Lincoln MKS model years listed in the fitment section. The assembly ships complete with the tank and its cover so you can swap it in without sourcing additional components. Professional installation is recommended to ensure correct hose routing and secure mounting.

How does this reservoir reduce coolant loss and overheating risk?

The YOUYIEN expansion tank captures excess coolant when the engine runs hot and returns it to the cooling system as the engine cools. A properly functioning reservoir maintains the system’s coolant volume and helps preserve cooling system pressure, reducing the chance of low coolant levels that can lead to overheating. Using a replacement that matches OEM fitment prevents leaks and poor seating that cause coolant loss.

• Direct-fit design replaces OEM part numbers listed for accurate installation.
• Includes tank and cover so no additional parts are required on delivery.
• Restores correct coolant return and pressure moderation functions.

What materials and testing make this tank reliable in engine bays?

This reservoir is made from PA66-GF35 blended with PP, a robust nylon/glass-fiber and polypropylene combination that resists high underhood temperatures and vibration. The reinforced materials are chosen for long-term dimensional stability and resistance to coolant chemicals. The product is built to meet OEM-style quality expectations and has been tested to withstand standard engine stresses.

• PA66-GF35 + PP construction for heat and impact resistance.
• Designed to tolerate repeated thermal cycles and vibration.
• Manufactured to meet common OEM performance standards.

Which vehicles and engines are compatible with this replacement tank?

Confirm your vehicle’s year, model and engine before ordering—this tank fits many Ford, Mercury and Lincoln vehicles produced in the 2008–2019 range. It supports several engine sizes and police interceptor variants; checking existing part numbers will prevent mistakes. Compatibility is broad but specific to the listed models and engines, so verify against your current reservoir.

• Fits Ford Explorer models (2011–2018 V6 3.5L; 2016–2018 L4 2.3L).
• Compatible with Police Interceptor Sedan/Utility and Special Service variants (2.0L, 3.5L, 3.7L where specified).
• Also fits Taurus (2008–2017), Mercury Sable (2008–2009), and Lincoln MKS (2009–2016) applications listed.

What should I check before ordering and installing this reservoir?

Match the replacement tank to the part numbers and the physical shape of your current reservoir before purchase. Inspect mounting points, fill neck orientation, hose connections and the cap interface to ensure compatibility. During installation, confirm hose clamps are tight and there are no leaks after pressure testing the cooling system.

• Verify existing part numbers and compare photos to avoid wrong purchases.
• Confirm mounting brackets, hose ports and cap fit match your vehicle.
• Have a professional install if unsure about routing or system pressure testing.

Who is this for: This YOUYIEN coolant expansion tank is aimed at owners, mechanics and fleet managers who need a dependable, OEM-style replacement for Ford Explorer, Police Interceptor, Taurus, Mercury Sable and Lincoln MKS models listed in the fitment. It’s useful for restoring proper coolant containment after a cracked or leaking reservoir, replacing a missing or damaged cap assembly, or prepping a vehicle for reliable service duty. If you want a durable, direct-fit tank that follows OEM part references and arrives ready to install with its cover, this product is intended for your vehicle—just verify part numbers and fitment first.