Is your Hyundai temperature gauge getting high? Learn how to fix the problem by checking/adding coolant on your Hyundai. This guide will teach you how to check engine coolant levels on a Hyundai.

You will also learn to add coolant if the coolant level is low. When the temperature gauge is reporting a level slightly higher than normal, your radiator may be low on coolant.


  • Check the coolant level warning message.
  • Hyundai engine overheats
  • The temperature gauge moves to high
  • A red temperature light comes on
  • Steam from the engine
  • Coolant reaches the minimum level

What you will need

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Genuine Hyundai Fluid 00232-19010 Long Life Coolant - 1 Gallon
Genuine Hyundai Fluid 00232-19010 Long Life Coolant – 1 Gallon
Genuine OEM part; Designed for ideal performance; Factory replacement part; Original equipment
  • Hyundai Coolant
    • Mixed 50% Antifreeze / 50% Distilled Water


This procedure applies to most Hyundai vehicles with non-pressurized coolant reservoirs.

  1. Turn off the engine and allow it to cool down.
  2. Pop the hood open by pulling the hood release under the hood.
  3. Find your coolant reservoir on the side of the engine and check the level by looking at the side of the container.coolant-reserve You should see a MIN and MAX line. check-level-1
  4. If the level is below the min level,  open the filler cap and add coolant to bring the level to just below the maximum level.filler-capmax-level
  5. Close the filler cap.filler-cap

Hyundais with pressurized reservoirs:

  1. Let the engine cool down.
  2. Pop the hood open.
  3. Find your coolant reservoir, and check the level.
  4. If the level is below the minimum level,  open the filler cap and add coolant to bring the level to just below the maximum level.
  5. Close the filler cap.

Follow these steps if the radiator is empty due to overheating, broken hose, or cooling system maintenance.

  1. Let the engine cool down. Never remove the radiator cap when the engine/coolant is still hot, or you risk getting burned.
  2. Pop the hood open.
  3. Locate and open the radiator cap by pushing it down and then turning it
  4. Fill the radiator with coolant until the coolant gets to the overflow pipe.fill-coolant
  5. Close the cap and add coolant to the overflow reservoir as well.

What color is Hyundai Coolant?

Typically GREEN.  What is more important is to use the color coolant type. Hyundai vehicles require Organic Acid Technology (OAT) coolants that may be orange, yellow, or green.

How often shall I need to replace the coolant on a Hyundai?

It is recommended to change the coolant every 30,000 miles. In some cases, we have seen owners not change the coolant/antifreeze up to 100,000 miles. At a minimum, you should change the coolant every 60,000 miles.

Can you put water instead of coolant on a Hyundai?

Using water in the cooling system is common practice in emergencies but not recommended otherwise. Your car’s cooling system needs coolant to keep it from overheating.

Although water can be added to the radiator in emergencies, manufacturers recommend adding a mixture of coolant and water because plain water can boil before the proper coolant boils, causing your engine to overheat. Water can also freeze and crack the engine block or burst cooling hoses.

Can you drive a car without coolant?

No. Your engine will overheat and can seize. You won’t be able to drive for very long before the engine sizes. Once the engine seizes, it won’t restart, and the engine will need to be replaced.

We hope you find the Hyundai Check Engine Coolant Level guide helpful. Check these troubleshooting and repair guides for more help on your Hyundai.

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