Quick answer
Kia coolant: genuine Kia Long Life Coolant is a silicate- and borate-free ethylene-glycol pre-mix per Hyundai Mobis. Aftermarket makers cite the shared Hyundai/Kia spec MS591-08. Check your Kia owner's manual for your model.
Kia coolant at a glance
Genuine coolant
Part number
Colour
Spec codes to look for
Watch out
Matching products
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Confirm the code in your owner’s manual before buying.
On this page
What coolant does Kia use?
- Hyundai Mobis describes Genuine Kia Long Life Coolant Pre-mixed (ACF79IKE04) as "designed and approved by Kia engineers" and free of silicates and borates. It lists the contents as 45–55% ethylene glycol and 45–50% water, with sebacic acid and potassium hydroxide. [1]
- Kia shares the MS591-08 coolant spec code with Hyundai in coolant makers' literature.
How Kia coolant changed over the years
Kia is Hyundai's sister company, and its genuine coolant comes through Hyundai Mobis [1]. But Kia's own manuals and parts listings are the ones to follow for a Kia.
2026 CV1 schedule (electric model)
Kia genuine coolant Not stated
120,000 mi or 120 months first; 24,000 mi or 24 months thereafter [2]
Genuine product
Kia Long Life Coolant Pre-mixed, ACF79IKE04 Not stated
45–55% ethylene glycol, sebacic acid [1]
Kia coolant chemistry
Mobis lists sebacic acid and potassium hydroxide in Kia's genuine premix, alongside 45–55% ethylene glycol, and says it is free of silicates and borates [1]. Sebacic acid is a carboxylate, the type of inhibitor used in organic-acid coolants.
Known Kia coolant issues
- The 2026 CV1 manual tells owners to visit an authorised Kia dealer when replacing or adding coolant [2], which is a stronger instruction than most makers give.
- Kia allows the coolant to be replaced before its interval when other maintenance is being done [2].
Genuine Kia coolant we list
All genuine Kia products and the details Kia publishes are on the Kia coolant brand page.
Aftermarket coolants listing a Kia code
Kia shares its coolant codes (Hyundai/Kia MS591-08) with its sister brand, so the full code table sits on the Hyundai page. A sample of the 4 matching products:
Coolants whose maker mentions Kia
3 more only mention Kia in application text, which is weaker than a code:
Other car makes
Other car makes
A Kia spec does not carry over to other brands. Also have a car from Ford or Hyundai? Look up GM / Chevrolet and Subaru too, and read can you mix coolant? before sharing one bottle. All makes: coolant by car make.
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Our best coolant for Hyundai & Kia page puts the genuine coolant and the aftermarket products that list a matching code side by side, with buying links. It is not a test or ranking.
Frequently asked questions
Should I add coolant to my Kia myself?
The 2026 CV1 manual says to visit an authorised Kia dealer when replacing or adding coolant.
What is in Kia genuine coolant?
Mobis lists 45–55% ethylene glycol, water, sebacic acid and potassium hydroxide, with no silicates or borates.
When is Kia coolant first replaced?
The 2026 CV1 schedule says 120,000 miles or 120 months, then every 24,000 miles or 24 months.
Is Coolant.com affiliated with Kia?
No. We are independent of Kia.
Kia coolant part numbers and spec codes
Part numbers here are copied from each genuine listing we cite; confirm them against your Kia manual before ordering.
| Genuine product | Part no. | Code shown | Listing |
|---|---|---|---|
| Kia Long Life Engine Coolant (Pre-mixed) | ACF79IKE04 | none printed | mobismea.com |
Kia spec codes listed by coolant makers
| Code | Products listing it | Example (maker's page cited on the product page) |
|---|---|---|
| Hyundai/Kia MS591-08 | 4 | Prestone MAX All Vehicles Antifreeze + Coolant |
Repair manuals & accessories
Repair manual for your car
Haynes repair manual for Kia
Step-by-step procedures, including draining, refilling and bleeding the cooling system. Manuals cover specific models and years: check the coverage on the cover before you buy.
Examples of the tool type, not a test or ranking by us. Check fit and instructions before you buy. See the full cooling system tools guide.
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How we source this page
- Facts come from manufacturer pages, datasheets, owner's manuals and standards bodies, linked under Sources.
- We do not test products, and no brand pays to be listed or ranked. Advertising and affiliate links are labelled and never change the data.
- Anything we could not find is marked "not published" rather than guessed. Spotted an error? Tell us.
Sources
Sources
- Hyundai Mobis: Kia Engine Coolant 5L (ACF79IKE04)
- Kia owner's manual (2026, CV1): Scheduled maintenance service
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