2023 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

16 Coolant / Antifreeze parts are listed for the 2023 Lexus NX250, from PRESTONE, PEAK, VALVOLINE and 3 other brands. 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, PEAK, PRESTONE and VALVOLINE supply 3 parts: the catalog's value-priced group. A representative part number is PEAK BQA1GAL.

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

The Premium section lists 5 options from PRESTONE and PEAK — a step above OE specification in materials, tolerances or warranty terms. PRESTONE AF2100 is listed in this group.

The Standard Replacement section lists 6 options from BECK/ARNLEY, AISIN, VALVOLINE and 2 other brands — built to original-equipment specification. AISIN ACT002 is listed in this group.

This table covers the seals at the Coolant Hose Connector / Flange. 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 106660.

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

3 Coolant Reservoir parts for the 2023 Lexus NX250 come from 3 brands — AUTOTECNICA, TECHPRO and VARIOUS MFR.

Listed part numbers: AUTOTECNICA TY0724561 and TECHPRO TO3014141, plus the other parts above.

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

2 Coolant Reservoir Cap parts for the 2023 Lexus NX250 come from 2 brands — CALORSTAT and MOTORAD.

This group includes CALORSTAT RC0170 and MOTORAD T122.

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

8 Radiator parts are listed for the 2023 Lexus NX250, from TECHPRO, CSF, TYC and 5 other brands. CSF 3858 carries the "Popular" badge.

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

The Standard Replacement section: 7 options from CSF, TYC, DENSO and 4 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 2023 Lexus NX250, from CALORSTAT, GATES, MOTORAD and 1 other brand.

This group includes CALORSTAT RC0047, GATES 31411 and MOTORAD T36 and the remaining parts above.

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

6 Radiator Fan Assembly parts for the 2023 Lexus NX250 come from 5 brands — TYC, VARIOUS MFR, ACKOJA and 2 other brands. The "Popular" part is TYC 624200.

The Economy section: 1 option from VARIOUS MFR. VARIOUS MFR TO3115202 is listed in this group.

Standard Replacement: 5 parts, from TYC, ACKOJA, AGILITY and 1 other brand. A representative part number is TYC 624200.

This group includes TYC 624200, VARIOUS MFR TO3115202 and TYC 624440 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 2023 Lexus NX250 come from GATES.

Part numbers include 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 2023 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.

Part numbers include STANDARD MOTOR PRODUCTS TX319, GPD 1814549 and WALKER PRODUCTS 2112017, among others listed 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 2023 Lexus NX250 come from 5 brands — AUTOTECNICA, MOTORAD, AISIN and 2 other brands. The "Popular" part is MOTORAD 1115180.

The Economy section: 1 option from AUTOTECNICA. AUTOTECNICA TY0719461 is listed in this group.

Standard Replacement: 4 parts, from MOTORAD, AISIN, BECK/ARNLEY and 1 other brand. A representative part number is MOTORAD 1115180.

Listed part numbers: MOTORAD 1115180, AUTOTECNICA TY0719461 and AISIN THT023, plus the other parts above.

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

One part is listed for the 2023 Lexus NX250 — ELRING 306360.

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

5 Thermostat Housing / Water Outlet parts for the 2023 Lexus NX250 come from 4 brands — MOTORAD, SKP, FOUR SEASONS and 1 other brand. The "Popular" part is SKP SK86328.

The Economy section: 1 option from SKP. SKP SK86328 is listed in this group.

Standard Replacement: 4 parts, from MOTORAD, FOUR SEASONS and GATES. A representative part number is FOUR SEASONS 86369.

This group includes SKP SK86328, FOUR SEASONS 86369 and GATES CO35076 and the remaining parts 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

8 Water Pump parts for the 2023 Lexus NX250 come from 6 brands — FVP, BECK/ARNLEY, SKP and 3 other brands. The "Popular" part is BECK/ARNLEY 1312557.

The Economy section: 2 options from BECK/ARNLEY and SKP. BECK/ARNLEY 1312557 is listed in this group.

Standard Replacement: 2 parts, from AISIN and GMB. A representative part number is AISIN WPT207.

4 further parts sit outside the graded sections, with the same engine-level match.

Listed part numbers: BECK/ARNLEY 1312557, SKP SKWP8233 and AISIN WPT207, plus the other 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

3 Water Pump Gasket parts are listed for the 2023 Lexus NX250, from ELRING, MAHLE / CLEVITE and VICTOR REINZ.

Part numbers include ELRING 917940, MAHLE / CLEVITE K33776 and VICTOR REINZ 711790100.