This page lists 3 cooling system parts for the 2026 Kia K4, across 2 part types, covering both the 1.6L L4 Turbocharged and the 2.0L L4. Every part shows its brand, manufacturer part number and fitment notes.
On the 2026 Kia K4, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. All 3 listed parts are Coolant / Antifreeze (2 parts) and Temperature Sender / Sensor (1 part).
The 2026 Kia K4 was sold with both the 1.6L L4 Turbocharged and the 2.0L L4. 2 parts fit every engine; the other 1 is engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 Kia K4 cooling system parts are PENTOSIN (1 part), VALVOLINE (1 part) and GPD (1 part).
Each part number listed for the 2026 Kia K4 opens a page with every vehicle that part fits.
Coolant / Antifreeze
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PENTOSIN Fits: all 2026 K4 engines | 8115209 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE Fits: all 2026 K4 engines | 861398 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Asian Vehicle Blue1 Gallon | View on Amazon |
This table covers the engine coolants and antifreeze formulations specified for this cooling system. Typical signs include a rising temperature gauge, rusty or sludged coolant, or a heater that blows cold. Use the chemistry named in the notes. Mixing silicate, OAT and HOAT formulas can gel in the radiator.
2 Coolant / Antifreeze parts for the 2026 Kia K4 come from 2 brands — PENTOSIN and VALVOLINE. Every part fits both the 1.6L L4 Turbocharged and the 2.0L L4.
Listed part numbers: PENTOSIN 8115209 and VALVOLINE 861398.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: 1.6L L4 Turbocharged | 1816395 | 🇺🇸 US 🇨🇦 CA | Lower Front, Lower Right | View on Amazon |
This table covers the senders that report coolant temperature to the gauge or ECU. Typical signs include a gauge that sits on empty or overheat, or a lamp that does not match what the engine is doing. Rule out the cluster and the wiring before replacing the sender.
This group shows a single part: GPD 1816395.
Buying Cooling System Parts for a 2026 Kia K4
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 2026 Kia K4?
Our catalog currently lists 3 cooling system parts for the 2026 Kia K4 across 2 subcategories and 3 brands, covering both the 1.6L L4 Turbocharged and the 2.0L L4. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2026 Kia K4 engines?
Some do. 2 parts fit every engine; the other 1 is engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2026 Kia K4?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2026 Kia K4 was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2026 Kia K4?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2026 Kia K4
Cooling System Parts for Other Kia K4 Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.