The Sedona typically uses an ethylene glycol–based HOAT coolant, and you should fill it with Kia Genuine Antifreeze/Coolant premixed 50/50 or an OEM-approved equivalent that meets Kia’s specifications.
The exact coolant formulation can vary by model year and market, so it’s important to consult your owner's manual or a Kia dealer if you’re unsure. This article outlines the general standard for modern Sedona models and how to choose the right coolant for maintenance or a refill.
Coolant technology in the Sedona
Most recent Kia Sedona models rely on Hybrid Organic Additive Technology (HOAT) coolant, which is based on ethylene glycol and balanced with additives to protect cooling-system metals and seals. HOAT formulations are designed for long-life performance in aluminum engines and mixed-metal cooling systems commonly found in modern vehicles.
HOAT vs. other coolant types
HOAT coolant sits between traditional inorganic/organic acid chemistries. It aims to provide long-term corrosion protection while being compatible with the aluminum components and mixed-metal parts found in today’s engines. Do not mix HOAT with incompatible coolants, as improper blends can reduce protection and cause deposits.
What to buy for your Sedona
Before listing options, here is a quick guide to selecting the right coolant for a Sedona refuel or service.
- Kia Genuine Antifreeze/Coolant — Premixed 50/50, formulated for Kia engines and cooling systems.
- OEM-equivalent HOAT coolant that meets Kia’s specifications (if Kia-branded product isn’t available).
- Universal HOAT coolant labeled as compatible with Hyundai/Kia engines and that meets the necessary standards for Kia vehicles.
Note: Avoid using Dex-Cool or other coolants unless explicitly approved for your specific model year by Kia, as incompatibilities can lead to deposits, gelling, or reduced cooling efficiency.
Maintenance and best-practice tips
Here are practical steps to maintain your Sedona’s cooling system and ensure you’re using the correct coolant.
- Check the coolant level in the reservoir when the engine is cold; keep it between the MIN and MAX marks.
- If low, add the correct premixed coolant until the level is again proper; avoid adding straight water to large fills.
- For a full coolant flush, follow Kia’s service procedure and refill with fresh HOAT coolant that meets Kia’s specifications.
- Inspect hoses, clamps, radiator, and the reservoir cap for leaks or wear; replace worn components as needed.
- Adhere to the service interval recommended by Kia for coolant replacement or system servicing (usually several years or miles, depending on model year).
Following these steps helps maintain proper engine temperature, protect cooling-system components, and prevent overheating or corrosion.
Summary
In short, a Kia Sedona generally uses HOAT ( Hybrid Organic Additive Technology) ethylene glycol-based coolant. Use Kia Genuine Antifreeze/Coolant premixed 50/50 or an OEM-approved equivalent that meets Kia specifications, and always consult the owner's manual or a Kia dealer for your exact model year. Regular checks and up-to-date maintenance ensure optimal cooling system performance and longevity.