2021 Kia Niro Cooling System Parts

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. Read more

16 Coolant / Antifreeze parts for the 2021 Kia Niro come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is PRESTONE AF3100.

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 2 options from PRESTONE and PEAK — 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 and PEAK supply 4 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, BECK/ARNLEY, AISIN and 2 other brands supply 8 parts: built to original-equipment specification. A representative part number is BECK/ARNLEY 2521501.

This table covers the Coolant Hose Connector flanges. Read more

2 Coolant Hose Connector / Flange parts for the 2021 Kia Niro come from 2 brands — AUTOTECNICA and FOUR SEASONS.

This group includes AUTOTECNICA HY0718764 and FOUR SEASONS 86337.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

One part is listed for the 2021 Kia Niro — AUTOTECNICA HY0623960.

This table covers the caps on the overflow / expansion tank. Typical signs include a leak at the neck, a cap that will not hold pressure, or a missing tether. Match the pressure rating or thread in the notes — radiator, reservoir and fuel caps are not interchangeable. Read more

One part is listed for the 2021 Kia Niro — MOTORAD T109.

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. Read more

7 Radiator parts for the 2021 Kia Niro come from 6 brands — NISSENS, GPD, AGILITY and 3 other brands. The "Popular" part is AGILITY 8013678.

The Economy section: 1 option from GPD. GPD 13678C is listed in this group.

Standard Replacement: 6 parts, from NISSENS, AGILITY, TYC and 2 other brands. A representative part number is AGILITY 8013678.

Listed part numbers: AGILITY 8013678, GPD 13678C and TYC 13678, plus the other parts above.

This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator. Read more

7 Radiator Fan Assembly parts are listed for the 2021 Kia Niro, from GPD, TECHPRO, VARIOUS MFR and 4 other brands. TYC 624770 carries the "Popular" badge.

Economy: 3 parts, from GPD, TECHPRO and VARIOUS MFR. A representative part number is GPD 2812209.

The Standard Replacement section: 4 options from TYC, AGILITY, FOUR SEASONS and 1 other brand. TYC 624770 is listed in this group.

Listed part numbers: TYC 624770, GPD 2812209 and TECHPRO KI3115158, plus the other parts above.

This table covers the upper, lower and connecting hoses between radiator, engine and reservoir. Typical signs include swelling, cracks, a soft spot, or a leak at a clamp. Replace adjacent aged hoses while the system is drained — they share the same heat cycle. Read more

GATES supplies both parts for the 2021 Kia Niro.

Part numbers include GATES 51975 and GATES 51976.

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. Read more

6 Temperature Sender / Sensor parts for the 2021 Kia Niro come from 6 brands — HOLSTEIN, GPD, STANDARD MOTOR PRODUCTS and 3 other brands. The "Popular" part is HOLSTEIN 2CTS0364.

The Economy section: 2 options from HOLSTEIN and GPD. HOLSTEIN 2CTS0364 is listed in this group.

Standard Replacement: 4 parts, from STANDARD MOTOR PRODUCTS, NISSENS, WALKER PRODUCTS and 1 other brand. A representative part number is STANDARD MOTOR PRODUCTS TX324.

This group includes HOLSTEIN 2CTS0364, GPD 1814532 and STANDARD MOTOR PRODUCTS TX324 and the remaining parts above.

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. Read more

2 Thermostat parts are listed for the 2021 Kia Niro, from HYUNDAI and MOTORAD.

This group includes HYUNDAI 2560003HC5 and MOTORAD 1212190.

This table covers the seals at the thermostat housing and water outlet. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again. Read more

This group shows a single part: ELRING 190120.

This table covers the housings and outlets the thermostat sits in. Read more

4 Thermostat Housing / Water Outlet parts are listed for the 2021 Kia Niro, from MOTORAD, ACKOJA and GATES.

Part numbers include ACKOJA A52990008, GATES CO35069 and MOTORAD CH1098, among others listed above.

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. Read more

6 Water Pump parts are listed for the 2021 Kia Niro, from GMB, FVP, GATES and 1 other brand. GATES 41242 carries the "Popular" badge.

This group includes GATES 41242, GMB 1462150AH and FVP 1462150 and the remaining parts above.

This table covers the gaskets between the water pump and the block or housing. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for. Read more

This group shows a single part: ELRING 190050.