GDUKOP Radiator Coolant Reservoir Tank for 2015-2023 Ford Mustang 2.3L–5.2L — Direct-Fit, High-Strength Plastic

GDUKOP replacement radiator coolant reservoir tank with cap restores proper coolant overflow and return for 2015–2023 Ford Mustang engines (2.3L, 3.7L, 5.0L, 5.2L) as a direct-fit, durable substitute for part numbers 603-285, DG9Z8100A, FR3Z8A080A, BE8Z8100A.

If your Mustang’s original expansion tank is cracked, leaking, or showing signs of deterioration, this GDUKOP reservoir provides an exact-fit replacement engineered to meet original equipment specifications. Built from high-strength plastic to resist under-hood heat and pressure cycles, the tank helps manage coolant overflow and return so the engine cooling system operates as intended. Designed for simple installation, it’s a practical repair option for DIYers and professional mechanics alike.

Will this GDUKOP tank fit my Mustang model?

This reservoir is compatible with Ford Mustangs from model years 2015 through 2023 with 2.3L, 3.7L, 5.0L, and 5.2L engines. Always confirm fit by matching the original part number before ordering to avoid returns.

• Replaces factory part numbers: 603-285, DG9Z8100A, FR3Z8A080A, BE8Z8100A
• Fits 2015–2023 Mustang engine variants: 2.3L, 3.7L, 5.0L, 5.2L
• Check your vehicle’s VIN or existing tank stamping to verify compatibility

How durable and heat-resistant is the replacement expansion tank?

GDUKOP manufactures the tank from a reinforced thermoplastic formulated to tolerate frequent temperature swings and under-hood pressure without cracking. The material resists aging from coolant and heat exposure, helping maintain leak-free performance over many miles.

• High-strength plastic resists high temperatures and pressure variations
• Corrosion- and coolant-resistant materials extend service life
• Factory-style welds and mounting points ensure structural integrity

How easy is installation and what do I need?

The GDUKOP tank is made as a direct replacement so it installs without cutting, drilling, or modifying the vehicle. Basic hand tools and a few minutes of time are typically all that’s required, though using a new cap and checking hoses is recommended while you’re working on the cooling system.

• Direct-fit design with original mounting locations and hose connections
• No special tools required—standard socket set and pliers usually suffice
• Inspect and replace coolant cap, hoses, and clamps as needed for a complete repair

What performance benefits should I expect after replacing the tank?

Replacing a damaged or leaking expansion tank restores the cooling system’s ability to control coolant levels and pressure, which helps maintain stable engine temperatures during normal driving. While not a performance upgrade, a sound reservoir prevents coolant loss, reduces the risk of overheating incidents caused by fluid leaks, and supports reliable engine operation.

• Prevents coolant loss from cracks or failed seams
• Supports consistent coolant return and overflow management
• Helps avoid temperature spikes related to insufficient coolant

Who is this for: The GDUKOP radiator coolant expansion tank is aimed at Mustang owners and technicians needing a dependable, OEM-style replacement for 2015–2023 Mustangs with 2.3L–5.2L engines. It suits DIY mechanics who want a straightforward swap to eliminate leaks and restore coolant containment, as well as repair shops seeking a cost-effective, durable replacement part that matches factory fitment and function.