Coolant Expansion Reservoir for Toyota SUV Cooling System ❄️

Keep your engine at the right temperature with this OEM-grade overflow reservoir. Molded to factory specs, it resists heat and vibration, features clear level marks, secure hose ports, and a tight sealing cap. Perfect for daily driving, towing, or off-road use.

Why this part is needed

The cooling system needs space for hot coolant to expand. This tank stores excess fluid, prevents spills, and feeds coolant back as the engine cools. It keeps pressure stable, stops air pockets, and helps the radiator work efficiently ️.

How it works

When coolant heats up, it flows from the radiator through the overflow hose into the reservoir. As temperatures drop, vacuum draws fluid back, maintaining the correct level. The cap controls pressure; some versions include a level sensor for quick checks ✅.

What happens if it’s damaged

Cracks, leaks, or a weak cap cause low coolant, overheating, bubbling in the reservoir, weak cabin heat, sweet smell, and puddles under the car. Continued driving can warp the head, blow the gasket, or damage the water pump—costly repairs ⚠️. Replacing the tank restores pressure balance and reliable cooling.

Tech tips

Inspect hoses, transfer any sensor and cap, fill with Toyota long-life coolant, and bleed air from the system. Recheck levels after a warm-up cycle.

Compatibility

• Land Cruiser Prado