Hyundai / Kia

Applicable Models: Ioniq 5, EV6

In Hyundai and Kia electric vehicles, the coolant must meet strict chemical and thermal compatibility requirements with the integrated cooling system that manages the battery, motor, and power electronics.

Key Coolant Properties

• Battery pack protection during high-speed (fast) charging

• Compatibility with plastic components and EPDM rubber materials

• Chemical stability for at least 5 years or 150,000 km of service life

Applicable Standards

• Hyundai-Kia Technical Standard HKS-5011

• ASTM D3306 / D4656: Antifreeze and corrosion resistance testing

OEM Approval Process

1. Verification of compliance with the HKS-5011 technical specification
2. Thermal cycle and material compatibility testing under operational conditions
3. Preparation and submission of technical documentation and test samples for Hyundai/Kia evaluation
4. Official OEM approval for inclusion in the Hyundai/Kia supply chain