Nissan LEAF 2023 Owners Manual
12.2.1. Cooling system
Never remove the coolant tank cap when the motor compartment is hot. Wait until the motor compartment cools down.
Coolant is poisonous and should be stored carefully in marked containers out of the reach of children.
The cooling system is filled at the factory with a high-quality, year-round, anti-freeze coolant solution. The anti-freeze solution contains rust and corrosion inhibitors, therefore additional cooling system additives are not necessary.
When adding or replacing coolant, be sure to use only a Genuine NISSAN Coolant or equivalent with the proper mixture ratio of 50% anti-freeze and 50% demineralised or distilled water.
The use of other types of coolant solutions may damage the high voltage cooling system parts.
Never use any additives in the coolant such as radiator sealer in the cooling system. This may cause damage to electrical equipment such as the motor and inverter.
The coolant tank is equipped with a special type of coolant tank cap. To minimise the risk of damage to the motor compartment, NISSAN recommends the use of a Genuine NISSAN coolant tank cap.