2025 Lexus NX250 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

10 Coolant / Antifreeze parts are listed for the 2025 Lexus NX250, from PRESTONE, VALVOLINE, AISIN and 1 other brand. PRESTONE AF2100 carries the "Popular" badge.

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 and VALVOLINE supply 2 parts: the catalog's value-priced group. A representative part number is PRESTONE AF3100.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 is listed in this group.

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 3 options from AISIN, PENTOSIN and VALVOLINE — built to original-equipment specification. AISIN ACT002 is listed in this group.

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

This group shows a single part: TECHPRO TO3014141.

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

This group shows a single part: CALORSTAT RC0170.

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 are listed for the 2025 Lexus NX250, from TECHPRO, CSF, TYC and 4 other brands. CSF 3858 carries the "Popular" badge.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO TO3010364.

The Standard Replacement section: 6 options from CSF, TYC, NISSENS and 3 other brands. CSF 3858 is listed in this group.

Part numbers include CSF 3858, TECHPRO TO3010364 and TYC 13670, among others listed above.

This table covers the caps that hold system pressure at the radiator or reservoir neck. 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

4 Radiator Cap parts are listed for the 2025 Lexus NX250, from CALORSTAT, GATES, MOTORAD and 1 other brand.

Part numbers include CALORSTAT RC0047, GATES 31411 and MOTORAD T36, among others listed above.

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

8 Radiator Fan Assembly parts for the 2025 Lexus NX250 come from 4 brands — AGILITY, TECHPRO, TYC and 1 other brand. The "Popular" part is TYC 624200.

The Economy section: 2 options from TECHPRO. TECHPRO TO3115202 is listed in this group.

Standard Replacement: 6 parts, from AGILITY, TYC and ACKOJA. A representative part number is TYC 624200.

This group includes TYC 624200, TECHPRO TO3115202 and TECHPRO TO3115210 and the remaining 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

2 Radiator Hose parts for the 2025 Lexus NX250 come from GATES.

This group includes GATES 52065 and GATES 52435.

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

5 Temperature Sender / Sensor parts are listed for the 2025 Lexus NX250, from GPD, STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and 2 other brands. STANDARD MOTOR PRODUCTS TX319 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 1814549.

The Standard Replacement section: 3 options from STANDARD MOTOR PRODUCTS, WALKER PRODUCTS and WELLS. STANDARD MOTOR PRODUCTS TX319 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

Listed part numbers: STANDARD MOTOR PRODUCTS TX319, GPD 1814549 and WALKER PRODUCTS 2112017, plus the other 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

5 Thermostat parts for the 2025 Lexus NX250 come from 5 brands — MOTORAD, ACKOJA, AISIN and 2 other brands. The "Popular" part is MOTORAD 1115180.

Part numbers include MOTORAD 1115180, ACKOJA A70990021 and AISIN THT023, among others listed above.