2021 Lexus ES250 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 2021 Lexus ES250, from PRESTONE, PEAK, VALVOLINE and 4 other brands. FVP MV5050GAL 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, FVP, PEAK, PRESTONE and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP MV5050GAL.

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

This group shows a single part: TECHPRO TO3014138.

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: MOTORAD T125.

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

9 Radiator parts are listed for the 2021 Lexus ES250, from TECHPRO, CSF, TYC and 6 other brands. CSF 3858 carries the "Popular" badge.

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

The Standard Replacement section: 8 options from CSF, TYC, AGILITY and 5 other brands. CSF 3858 is listed in this group.

Listed part numbers: CSF 3858, TECHPRO TO3010364 and TYC 13670, plus the other parts 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

5 Radiator Cap parts are listed for the 2021 Lexus ES250, from MOTORAD, GATES, CALORSTAT and 1 other brand. GATES 31411 carries the "Popular" badge.

The Locking Replacement section lists 1 option from MOTORAD — grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. MOTORAD ST36 is listed in this group.

The Standard Replacement section: 4 options from GATES, CALORSTAT, MOTORAD and 1 other brand. GATES 31411 is listed in this group.

Listed part numbers: GATES 31411, MOTORAD ST36 and CALORSTAT RC0047, 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 for the 2021 Lexus ES250 come from 7 brands — GPD, VARIOUS MFR, AGILITY and 4 other brands. The "Popular" part is AGILITY 6010458.

The Economy section: 2 options from GPD and VARIOUS MFR. GPD 2812044 is listed in this group.

Standard Replacement: 5 parts, from AGILITY, TYC, ACKOJA and 2 other brands. A representative part number is AGILITY 6010458.

Part numbers include AGILITY 6010458, GPD 2812044 and VARIOUS MFR TO3115202, among others listed 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

3 Radiator Hose parts for the 2021 Lexus ES250 come from 2 brands — GATES and CONTINENTAL.

Part numbers include CONTINENTAL 62145, GATES 52064 and GATES 51815.

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 are listed for the 2021 Lexus ES250, from GPD, AISIN, STANDARD MOTOR PRODUCTS and 3 other brands. AISIN THSAZ8004 carries the "Popular" badge.

Economy: 1 part, from GPD. A representative part number is GPD 1712504.

The Standard Replacement section: 5 options from AISIN, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 2 other brands. AISIN THSAZ8004 is listed in this group.

This group includes AISIN THSAZ8004, GPD 1712504 and STANDARD MOTOR PRODUCTS TX319 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

6 Thermostat parts for the 2021 Lexus ES250 come from 6 brands — AUTOTECNICA, AISIN, MOTORAD and 3 other brands. The "Popular" part is AISIN THT023.

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

Standard Replacement: 5 parts, from AISIN, MOTORAD, BECK/ARNLEY and 2 other brands. A representative part number is AISIN THT023.

Listed part numbers: AISIN THT023, AUTOTECNICA TY0719461 and MOTORAD 1115180, 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 2021 Lexus ES250 — ELRING 306360.

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

7 Thermostat Housing / Water Outlet parts for the 2021 Lexus ES250 come from 4 brands — MOTORAD, GATES, SKP 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: 6 parts, from MOTORAD, GATES and FOUR SEASONS. A representative part number is GATES CO35076.

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

7 Water Pump parts for the 2021 Lexus ES250 come from 5 brands — FVP, SKP, AISIN and 2 other brands. The "Popular" part is SKP SKWP8233.

The Economy section: 1 option from SKP. SKP SKWP8233 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: SKP SKWP8233, AISIN WPT207 and GMB 1709040, 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 2021 Lexus ES250, from ELRING, MAHLE / CLEVITE and VICTOR REINZ.

This group includes ELRING 917940, MAHLE / CLEVITE K33776 and VICTOR REINZ 711790100.