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Coolant

2C_Coolant

Check the condition and connections of all cooling system hoses and heater hoses. Replace any swollen or deteriorated hoses.

The coolant level should be filled between the MAX or F and the MIN or L marks on the side of the coolant reservoir when the parts in the motor compartment is cool.

If the coolant level is low, add enough distilled (deionized) water mixed with antifreeze to bring the level to the MAX mark. If frequent additions are required, have your vehicle inspected by an authorized HYUNDAI dealer.

Use only designated coolant water for electric vehicles, adding other types of water or antifreeze can damage the vehicle.

2C_MotorRoomHotCaution

Keep hands, clothing, and tools away from the rotating fan blades of the cooling fan. The electric motor for the cooling fan may continue to operate or start up when the vehicle is off and can cause serious injury.

The electric motor for the cooling fan is controlled by vehicle coolant temperature, refrigerant pressure, and vehicle speed. As the vehicle coolant temperature decreases, the electric motor automatically shuts off. This is a normal condition.

WL_RadiatorHotWarning

  • Check the coolant level when the motor compartment is cooled. Coolant level is influenced by temperature, and if the coolant reservoir cap is removed when coolant temperature is high, hot coolant and steam may blow out under pressure causing serious injury.

  • Make sure the coolant cap is properly closed after refilling coolant. Otherwise the motor could be overheated while driving.

Make sure the coolant cap is properly closed after refilling coolant. Otherwise, the motor could be overheated while driving.

  1. Check if the coolant cap label is straight in front.

    2C_CheckCoolantCapLocked

  2. Make sure that the tiny protrusions inside the coolant cap is securely interlocked.

    2C_CheckCoolantCapLocked_2

Recommended coolant

  • When adding coolant, use only deionized water, distilled water, or soft water for your vehicle and never mix hard water in the coolant filled at the factory.

  • An incorrect coolant mixture may result in severe malfunction or motor damage.

  • Do not use alcohol or methanol coolant or mix them with the specified coolant.

  • Do not use a solution that contains more than 60 % antifreeze or less than 35 % antifreeze, which could reduce the effectiveness of the solution.

For mixing percentage, refer to the following table:

Ambient Temperature

Mixture Percentage (volume)

Antifreeze

Water

5 °F (-15 °C)

35

65

-13 °F (-25 °C)

40

60

-31 °F (-35 °C)

50

50

-49 °F (-45 °C)

60

40

If in doubt about the mix ratio, a 50 % water and 50 % antifreeze mix is the easiest to mix together because it is the same quantity for each.