Prosentuo Engine Coolant Reservoir for 2003–2007 Ford Super Duty/Excursion — Direct-Fit, Cap Included

Prosentuo 603-217 is a direct-fit engine coolant reservoir tank with cap that replaces 3C3Z8A080AE and 6C3Z8A080B for 2003–2007 Ford F‑250/F‑350/F‑450/F‑550 Super Duty and 2003–2007 Excursion models.

This replacement expansion tank is built to match OE dimensions and mounting points while improving durability with a reinforced PA composite and dual-layer sealing. It comes complete with cap and is designed to resist heat, vibration, and corrosion from common antifreeze formulas so you can restore coolant containment and overflow control quickly after a failure or during maintenance.

Will this reservoir fit my Ford Super Duty or Excursion?

Yes — the Prosentuo 603-217 is manufactured to fit specific model years and engine types listed by OEM cross-reference. It replaces factory part numbers 603-217, 6C3Z-8A080-B, and 3C3Z-8A080A‑E, ensuring correct alignment with existing hoses and mounting points.

• Compatible with 2003–2007 Ford Excursion 6.0L engines.
• Fits 2005–2007 Ford F‑250 and F‑350 Super Duty 5.4L and 6.8L engines.
• Fits 2003–2007 F‑250/F‑350/F‑450/F‑550 Super Duty 6.0L engines.
• Direct-replacement for OEM mounting and hose connections.

What materials and features improve its longevity?

The tank is molded from a reinforced PA (polyamide) composite with a dual-layer structure to withstand high underhood temperatures and repeated vibration. A corrosion-resistant coating on the interior reduces chemical attack from antifreeze additives, while the dual-layer sealing minimizes seepage and oil dilution risks.

• Reinforced PA composite resists heat and mechanical stress.
• Dual-layer sealing reduces leaks and contamination.
• Anti-corrosion coating works with mainstream antifreeze formulas.
• Includes durable OEM-style cap to prevent overheating issues.

How does installation and maintenance compare to the original?

Installation is intended to be simple: the tank uses standard OE mounting points and hose fittings so removal and replacement follow the factory layout. Routine maintenance only requires checking the cap and fluid levels, and the included cap prevents compatibility issues that sometimes arise with aftermarket lids.

• Plug-and-play fitment for straightforward swap-outs.
• Cap included to match pressure and seal specs.
• Maintenance: inspect hoses, caps, and fluid level periodically.
• Designed to lower the likelihood of premature failure versus basic replacements.

Does Prosentuo offer any warranty or support?

Prosentuo backs this coolant reservoir with a one-year warranty against manufacturing defects and offers customer support for installation questions or issues. If quality problems arise within the warranty period, reach out to Prosentuo for repair, replacement, or guidance per their service policy.

• One-year warranty included with purchase.
• Customer support available for fitment or defect concerns.
• Clear OEM cross-reference numbers for verification.
• Replacement options handled under warranty terms.

Who is this for: This Prosentuo 603-217 reservoir tank is aimed at owners and technicians working on 2003–2007 Ford F‑250/F‑350/F‑450/F‑550 Super Duty trucks and 2003–2007 Excursions who need a reliable, direct-replacement expansion tank. Choose it if you require OEM-compatible fitment, improved materials for longer life, and an included cap to restore proper coolant overflow function without custom modifications.