Ford Mustang GT Mk6 Coolant Expansion Tank Bottle Reservoir FR33-8A080-AC

The Ford Mustang GT Mk6 Coolant Expansion Tank is an original cooling system component designed for the sixth-generation Ford Mustang GT models. It ensures stable operation of the cooling system by maintaining the correct fluid level and allowing for safe compensation during temperature changes.

Specifications and technical data

• SKU: 5273591
• Mark: Ford
• Condition: Used
• OEM Part Number: 5273591
• Substitutable numbers: 5273591, FR33-8A080-AC, FR338A080AC
• Part type: Reservoir
• Category: Washer Pumps, Reservoirs & Nozzles

Purpose and Function in the Cooling System

The Coolant Expansion Tank for Ford Mustang GT Mk6 functions as a component that compensates for fluid volume changes during engine heating and cooling. A properly selected tank helps maintain:

• stable pressure in the cooling system – which reduces the risk of engine overheating,
• fluid level control – facilitating quick assessment of the system's condition during inspections,
• safe discharge of excess fluid – minimizing the risk of leaks in the engine bay.

Thanks to its construction in line with Ford's factory standards, the tank integrates with the original cooling system without requiring installation modifications.

Original Origin and Fitment

The product comes from the Ford OE line, meaning it retains factory operating parameters and mounting geometry. Original mounting points, hose connections, and housing shape are precisely fitted to the Mustang GT Mk6 engine bay, resulting in:

• secure fitment with factory brackets – without play or material stress,
• correct routing of coolant hoses – following the factory layout,
• preservation of designed fluid flow – crucial for uniform engine cooling.

Such precise fitment is particularly important in high-performance vehicles where the cooling system operates under greater thermal load.

Performance Characteristics of a Used Part

The offered tank is a used component, providing a favorable compromise between cost and adherence to the manufacturer's original specifications. In practice, this means:

• attractive price-to-quality ratio – especially compared to new non-OE aftermarket parts,
• retention of factory design – with no changes to working capacity or port layout,
• economical cooling system repair option – while maintaining Ford standards.

Prior to installation, a standard check of system tightness and the condition of hoses and clamps is recommended to fully leverage the potential of the replacement tank.

Benefits of Using an Original Expansion Tank

Choosing the original Ford Mustang GT Mk6 expansion tank offers a range of practical benefits for everyday use:

• maintaining predictable cooling system behavior – important during dynamic driving and high engine loads,
• compatibility with the factory cap and sensors – without the need for adaptation,
• consistency with other Ford OE components – simplifying diagnostics and servicing.

For Mustang GT owners who wish to maintain the car's character in line with factory specifications, using an original cooling system component is a technically safe and predictable solution.

Related Products and Technical Knowledge

If you are also looking for other items in the Ford Washer Tanks, Pumps, and Nozzles category, check out our offer: Ford Washer Tanks, Pumps, and Nozzles. This will help you easily assemble components responsible for visibility and driving safety.

When planning comprehensive vehicle system servicing, it's worth expanding your knowledge about other sub-assemblies. See the guide article “Fuel System – Injectors, Pumps, and Fuel Tank: Maintenance and Repair”, which discusses diagnostics, part selection by VIN/OEM, and operating principles for key engine fuel supply components.