Coolant Reservoir Expansion Tank 21710-4GN0A For 2014-2015 Infiniti Q50 3.7L

Coolant Reservoir Expansion Tank for Infiniti

This coolant reservoir expansion tank for Infiniti stores excess engine coolant and maintains system pressure, cross-referencing part number 21710-4GN0A.

Overview

The coolant reservoir expansion tank for Infiniti is a critical component that catches overflow coolant as it expands from engine heat. This coolant reservoir expansion tank for Infiniti ensures the cooling system remains pressurized and free of air to prevent overheating. It is designed as a direct replacement for damaged or leaking factory units in high performance sedans.

Built For Performance

• Manufactured from heat-resistant polymer to withstand high engine bay temperatures.
• Translucent material allows for quick visual inspection of coolant levels.
• Reinforced mounting points ensure a secure fit within the engine compartment.
• Precision molded dimensions match factory specifications for hose connections.
• Internal baffling helps manage fluid movement during vehicle operation.

Fits These Machines

• for Infiniti Q50 3.7L 2014
• for Infiniti Q50 3.7L 2015

On-The-Job Use

• Managing thermal expansion of engine fluids during daily driving.
• Preventing coolant loss by capturing overflow for recirculation.
• Maintaining the vacuum seal required for efficient radiator operation.
• Replacing aged or brittle plastic tanks that are prone to cracking.

Specs At A Glance

Good To Know

Q: What causes these tanks to fail over time? A: Constant exposure to extreme temperature fluctuations causes the plastic to become brittle and eventually develop hairline cracks.

Q: Is it necessary to drain the entire cooling system for installation? A: Usually only the fluid within the reservoir and upper hoses needs to be managed when swapping the tank.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.