The 2026 Kia K5 has 15 cooling system parts with verified fitment on this page — 4 part types and 8 brands, covering both the 2.5L L4 and the 2.5L L4 Turbocharged. Each part includes a manufacturer part number and application notes.
The cooling system system on the 2026 Kia K5 keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (7 parts), Radiator Fan Assembly (4 parts) and Temperature Sender / Sensor (2 parts). The other 1 part type covers the remaining 2 parts.
The 2026 Kia K5 was sold with both the 2.5L L4 and the 2.5L L4 Turbocharged. 8 parts fit every engine; the other 7 are engine-specific. Each part shows which engine(s) it fits.
8 brands supply cooling system parts for the 2026 Kia K5, led by PRESTONE (5 parts), VDO / CONTINENTAL (2 parts) and GPD (2 parts), plus 5 more brands. Quality grades include Standard Replacement, Premium and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2026 Kia K5. 2 parts have it, including PRESTONE AF2100 (Coolant / Antifreeze) and VALVOLINE 861398 (Coolant / Antifreeze). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2026 K5 engines | AF3055 | 🇺🇸 US | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2026 K5 engines | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: all 2026 K5 engines | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE Fits: all 2026 K5 engines | AF6210 | 🇺🇸 US | MAX Original EquipmentAsian Red/Pink | View on Amazon |
| PRESTONE Fits: all 2026 K5 engines | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 2026 K5 engines | 861398 | 🇺🇸 US | Asian Vehicle Blue1 Gallon | View on Amazon |
| PENTOSIN Fits: all 2026 K5 engines | 8115209 | 🇺🇸 US | Pentofrost A41 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.
7 Coolant / Antifreeze parts are listed for the 2026 Kia K5, from PRESTONE, VALVOLINE and PENTOSIN. PRESTONE AF2100 carries the "Popular" badge. All of them fit every engine offered in the 2026 K5.
The Compatible With All Colors section lists 1 option from PRESTONE — grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. PRESTONE AF3055 is listed in this group.
In the Economy grade, PRESTONE supplies 1 part: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Premium section lists 3 options from PRESTONE — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.
The Standard Replacement section lists 2 options from VALVOLINE and PENTOSIN — built to original-equipment specification. VALVOLINE 861398 is listed in this group.
Part numbers include PRESTONE AF2100, PRESTONE AF3055 and PRESTONE AF3100, among others listed above.
Radiator Fan Assembly
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ULTRA-POWER Fits: 2.5L L4 | 624790 | 🇺🇸 US 🇨🇦 CA | RightDoor Mirror | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Fits: 2.5L L4 | 624790 | 🇺🇸 US | View on Amazon | |
| VDO / CONTINENTAL Fits: 2.5L L4 | FA74068 | 🇺🇸 US | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VDO / CONTINENTAL Fits: 2.5L L4 Turbocharged | FA74068 | 🇺🇸 US | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
4 Radiator Fan Assembly parts for the 2026 Kia K5 come from 3 brands — VDO / CONTINENTAL, ULTRA-POWER and TYC.
The Economy section: 1 option from ULTRA-POWER. ULTRA-POWER 624790 is listed in this group.
Standard Replacement: 2 parts, from TYC and VDO / CONTINENTAL. A representative part number is TYC 624790.
1 further part sits outside the graded sections, with the same engine-level match.
Part numbers include ULTRA-POWER 624790 and VDO / CONTINENTAL FA74068, among others listed above.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD Fits: all 2026 K5 engines | 1816395 | 🇺🇸 US | Lower Front, Lower Right | View on Amazon |
| GPD Fits: 2.5L L4 Turbocharged | 1816627 | 🇺🇸 US | Thermostat Housing | 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.
GPD supplies both parts for the 2026 Kia K5. 1 part fits every engine; the other 1 is engine-specific.
Listed part numbers: GPD 1816395 and GPD 1816627.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GMB Fits: 2.5L L4 | 1463010AH | 🇺🇸 US | Includes Housing | View on Amazon |
| GMB Fits: 2.5L L4 Turbocharged | 1463040AH | 🇺🇸 US | Includes Housing | View on Amazon |
This table covers the pumps that circulate coolant through the block and radiator. Typical signs include coolant at the weep hole, pulley play, or a growl from the front of the engine. Replace the thermostat and refill with the specified coolant whenever the pump comes off.
2 Water Pump parts for the 2026 Kia K5 come from GMB.
This group includes GMB 1463010AH and GMB 1463040AH.
Buying Cooling System Parts for a 2026 Kia K5
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 Radiator Fan Assembly .
Frequently Asked Questions
How many cooling system parts fit the 2026 Kia K5?
Our catalog currently lists 15 cooling system parts for the 2026 Kia K5 across 4 subcategories and 8 brands, covering both the 2.5L L4 and the 2.5L L4 Turbocharged. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2026 Kia K5 engines?
Some do. 8 parts fit every engine; the other 7 are 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 K5?
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 K5 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 K5?
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 K5
Cooling System Parts for Other Kia K5 Years
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