This page lists 20 cooling system parts for the 2025 Kia Niro, across 6 part types, covering both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. Every part shows its brand, manufacturer part number and fitment notes.
On the 2025 Kia Niro, 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. Most of the listed parts are Coolant / Antifreeze (10 parts), Temperature Sender / Sensor (4 parts) and Radiator (2 parts). The other 3 part types cover the remaining 4 parts.
The 2025 Kia Niro was sold with both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. 2 parts fit every engine; the other 18 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2025 Kia Niro cooling system parts are PRESTONE (7 parts), VALVOLINE (2 parts) and FVP (2 parts), plus 7 more brands. Quality grades include Standard Replacement, Economy and Premium.
2 parts on this 2025 Kia Niro page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including PRESTONE AF2100 (Coolant / Antifreeze) and VALVOLINE 861398 (Coolant / Antifreeze). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: 1.6L L4 ELECTRIC/GAS | AF3055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: 1.6L L4 ELECTRIC/GAS | AF3100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2025 Niro engines | AFC12100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular Fits: 1.6L L4 ELECTRIC/GAS | AF2100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE Fits: 1.6L L4 ELECTRIC/GAS | AF6210 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | MAX Original EquipmentAsian Red/Pink | View on Amazon |
| PRESTONE Fits: 1.6L L4 ELECTRIC/GAS | AFMAX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: 1.6L L4 ELECTRIC/GAS | 861398 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Asian Vehicle Blue1 Gallon | View on Amazon |
| PENTOSIN Fits: all 2025 Niro engines | 8115209 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE Fits: 1.6L L4 ELECTRIC/GAS | 898406 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Hybrid Vehicle1 Gallon | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: ELECTRIC | 78065 | 🇺🇸 US 🇨🇦 CA | Heavy Duty | 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.
10 Coolant / Antifreeze parts for the 2025 Kia Niro come from 3 brands — PRESTONE, VALVOLINE and PENTOSIN. The "Popular" part is PRESTONE AF2100. 2 parts fit every engine; the other 8 are engine-specific.
In the Compatible With All Colors grade, PRESTONE supplies 1 part: grouped under the catalog's "Compatible With All Colors" designation — the notes column spells out what sets them apart. A representative part number is PRESTONE AF3055.
The Economy section lists 1 option from PRESTONE — the catalog's value-priced group. PRESTONE AF3100 is listed in this group.
In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.
In the Premium grade, PRESTONE supplies 3 parts: a step above OE specification in materials, tolerances or warranty terms. A representative part number is PRESTONE AF2100.
In the Standard Replacement grade, VALVOLINE and PENTOSIN supply 3 parts: built to original-equipment specification. A representative part number is VALVOLINE 861398.
1 further part sits outside the graded sections, with the same engine-level match.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP Fits: 1.6L L4 ELECTRIC/GAS | RAD14020 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| FVP Fits: ELECTRIC | RAD14052 | 🇺🇸 US 🇨🇦 CA | Low Temperature | View on Amazon |
This table covers the radiators that dump engine heat to airflow through the core. Typical signs include overheating in traffic, a wet core, or coolant that disappears with no puddle. Replace the cap if it cannot hold the rated pressure, and bleed the system after the swap.
2 Radiator parts for the 2025 Kia Niro come from FVP.
Listed part numbers: FVP RAD14020 and FVP RAD14052.
Radiator Fan Assembly
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TECHPRO Fits: 1.6L L4 ELECTRIC/GAS | KI3115168 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC Fits: 1.6L L4 ELECTRIC/GAS | FA51165C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
2 Radiator Fan Assembly parts are listed for the 2025 Kia Niro, from TECHPRO and UAC.
Economy: 1 part, from TECHPRO. A representative part number is TECHPRO KI3115168.
The Standard Replacement section: 1 option from UAC. UAC FA51165C is listed in this group.
Listed part numbers: TECHPRO KI3115168 and UAC FA51165C.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| HOLSTEIN Fits: 1.6L L4 ELECTRIC/GAS | 2CTS0364 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: 1.6L L4 ELECTRIC/GAS | TX324 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WELLS Fits: 1.6L L4 ELECTRIC/GAS | 5S17565 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| STANDARD MOTOR PRODUCTS Fits: ELECTRIC | TX324 | 🇺🇸 US 🇨🇦 CA | 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.
4 Temperature Sender / Sensor parts for the 2025 Kia Niro come from 3 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN and WELLS.
The Economy section: 1 option from HOLSTEIN. HOLSTEIN 2CTS0364 is listed in this group.
Standard Replacement: 2 parts, from STANDARD MOTOR PRODUCTS and WELLS. A representative part number is STANDARD MOTOR PRODUCTS TX324.
1 further part sits outside the graded sections, with the same engine-level match.
This group includes HOLSTEIN 2CTS0364, STANDARD MOTOR PRODUCTS TX324 and WELLS 5S17565 and the remaining parts above.
Thermostat
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 1.6L L4 ELECTRIC/GAS | 1212190 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Seal | View on Amazon |
This table covers the thermostats that open the coolant circuit at the specified temperature. Typical signs include slow warm-up, a gauge that climbs in traffic, or heat that never quite arrives. Replace the housing gasket with the thermostat and bleed the system so a trapped air pocket does not cook the new part.
One part is listed for the 2025 Kia Niro — MOTORAD 1212190.
Thermostat Housing / Water Outlet
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD Fits: 1.6L L4 ELECTRIC/GAS | CH1098 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Thermostat Housing | View on Amazon |
This table covers the housings and outlets the thermostat sits in.
One part is listed for the 2025 Kia Niro — MOTORAD CH1098.
Buying Cooling System Parts for a 2025 Kia Niro
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 2025 Kia Niro?
Our catalog currently lists 20 cooling system parts for the 2025 Kia Niro across 6 subcategories and 10 brands, covering both the 1.6L L4 ELECTRIC/GAS and the ELECTRIC. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2025 Kia Niro engines?
Some do. 2 parts fit every engine; the other 18 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 2025 Kia Niro?
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 2025 Kia Niro 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 2025 Kia Niro?
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 2025 Kia Niro
Cooling System Parts for Other Kia Niro Years
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