2024 Lexus ES300H 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

15 Coolant / Antifreeze parts for the 2024 Lexus ES300H come from 6 brands — PRESTONE, PEAK, VALVOLINE and 3 other brands. The "Popular" part is PRESTONE AF2100.

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 PEAK and PRESTONE — the catalog's value-priced group. PEAK BQA1GAL is listed in this group.

In the Premium grade, PRESTONE and PEAK supply 5 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 7 parts: built to original-equipment specification. A representative part number is AISIN ACT002.

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

One part is listed for the 2024 Lexus ES300H — 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

3 Coolant Reservoir Cap parts are listed for the 2024 Lexus ES300H, from CALORSTAT, GATES and MOTORAD.

This group includes CALORSTAT RC0145, GATES 31541 and MOTORAD T51.

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 2024 Lexus ES300H come from 7 brands — GPD, TECHPRO, CSF and 4 other brands. The "Popular" part is CSF 3902.

The Economy section: 2 options from GPD and TECHPRO. GPD 13695C is listed in this group.

Standard Replacement: 4 parts, from CSF, TYC, DENSO and 1 other brand. A representative part number is CSF 3902.

1 further part sits outside the graded sections, with the same engine-level match.

This group includes CSF 3902, GPD 13695C and TECHPRO TO3010368 and the remaining 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

4 Radiator Cap parts for the 2024 Lexus ES300H come from 4 brands — 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

3 Radiator Fan Assembly parts are listed for the 2024 Lexus ES300H, from TECHPRO, TYC and UAC.

Economy: 1 part, from TECHPRO. A representative part number is TECHPRO TO3115209.

The Standard Replacement section: 2 options from TYC and UAC. TYC 625480 is listed in this group.

This group includes TECHPRO TO3115209, TYC 625480 and UAC FA50635C.

This table covers the Radiator insulators. Read more

One part is listed for the 2024 Lexus ES300H — TECHPRO TO3013100.

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

4 Temperature Sender / Sensor parts for the 2024 Lexus ES300H come from 4 brands — GPD, STANDARD MOTOR PRODUCTS, WELLS and 1 other brand.

The Economy section: 1 option from GPD. GPD 1814549 is listed in this group.

Standard Replacement: 2 parts, from STANDARD MOTOR PRODUCTS and WELLS. A representative part number is STANDARD MOTOR PRODUCTS TX319.

1 further part sits outside the graded sections, with the same engine-level match.

Listed part numbers: GPD 1814549, STANDARD MOTOR PRODUCTS TX319 and WELLS 5S17570, 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

One part is listed for the 2024 Lexus ES300H — MOTORAD 1231180.

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: MAHLE / CLEVITE C33798.

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

One part is listed for the 2024 Lexus ES300H — MOTORAD CH2094.

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 are listed for the 2024 Lexus ES300H, from FVP, BECK/ARNLEY, AISIN and 3 other brands. BECK/ARNLEY 1312557 carries the "Popular" badge.

Economy: 1 part, from BECK/ARNLEY. A representative part number is BECK/ARNLEY 1312557.

The Standard Replacement section: 3 options from AISIN, FOUR SEASONS and GMB. AISIN WPT207 is listed in this group.

4 ungrouped parts are not assigned to a grade, with the same engine-level match.

Part numbers include BECK/ARNLEY 1312557, AISIN WPT207 and FOUR SEASONS 89072, among others listed 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

2 Water Pump Gasket parts for the 2024 Lexus ES300H come from 2 brands — MAHLE / CLEVITE and VICTOR REINZ.

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