30 Cooling system parts are listed for the 2025 Lexus RX500H, in 7 part types, covering the 2.4L L4 ELECTRIC/GAS Turbocharged engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 2025 Lexus RX500H, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. 22 parts of the 30 listed are Coolant / Antifreeze (10 parts), Temperature Sender / Sensor (7 parts) and Radiator (5 parts). The other 4 part types cover the remaining 8 parts.
The 2025 Lexus RX500H came with a single engine, the 2.4L L4 ELECTRIC/GAS Turbocharged, and every part is verified against it.
16 brands supply cooling system parts for the 2025 Lexus RX500H, led by PRESTONE (6 parts), CALORSTAT (3 parts) and VALVOLINE (2 parts), plus 13 more brands. Quality grades include Standard Replacement, Economy and Premium.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2025 Lexus RX500H. 5 parts have it, including PRESTONE AF2100 (Coolant / Antifreeze) and CSF 3954 (Radiator). Each part number opens a page with every vehicle that part fits.
Coolant / Antifreeze
Compatible With All Colors
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3055 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AF3100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prime Yellow - All VehiclesExtended Life | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE | AFC12100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | All Vehicles10yr/300k mi | View on Amazon |
| PRESTONE | AF6210 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | MAX Original EquipmentAsian Red/Pink | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Popular | ACT002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | PinkHOAT | View on Amazon |
| PENTOSIN | 8115209 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE | 675130 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Asian Vehicle Red1 Gallon | View on Amazon |
| VALVOLINE | 898406 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Hybrid Vehicle1 Gallon | View on Amazon |
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.
10 Coolant / Antifreeze parts are listed for the 2025 Lexus RX500H, 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 supplies 1 part: 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 4 options from VALVOLINE, AISIN and PENTOSIN — built to original-equipment specification. AISIN ACT002 is listed in this group.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | RC0170 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Attachment Type: Push Fit | View on Amazon |
| CALORSTAT | RC0145 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Attachment Type: Threaded | View on Amazon |
| MOTORAD | T51 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
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.
3 Coolant Reservoir Cap parts for the 2025 Lexus RX500H come from 2 brands — CALORSTAT and MOTORAD.
Part numbers include CALORSTAT RC0170, CALORSTAT RC0145 and MOTORAD T51.
Radiator
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 13913C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| TECHPRO | LX3010164 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CSF Popular | 3954 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Upgraded Core. 11% Thicker 30mm vs OEM 27mm | View on Amazon |
| TYC | 13984 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | F Sport or F Sport Performance | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | RAD14046 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Secondary | View on Amazon |
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.
5 Radiator parts are listed for the 2025 Lexus RX500H, from GPD, TECHPRO, CSF and 2 other brands. CSF 3954 carries the "Popular" badge.
Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 13913C.
The Standard Replacement section: 2 options from CSF and TYC. CSF 3954 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include CSF 3954, GPD 13913C and TECHPRO LX3010164, among others listed above.
Radiator Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | RC0047 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes 2 sealsMetallic | View on Amazon |
| MOTORAD | T36 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Standard | View on Amazon |
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.
2 Radiator Cap parts are listed for the 2025 Lexus RX500H, from CALORSTAT and MOTORAD.
Listed part numbers: CALORSTAT RC0047 and MOTORAD T36.
Radiator Fan Assembly
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC | 625010 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
This group shows a single part: TYC 625010.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1814549 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| HOLSTEIN | 2CTS0051 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Located on Thermostat Housing | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | D583 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| STANDARD MOTOR PRODUCTS Popular | TX40 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rectangular Connector2 Terminal | View on Amazon |
| STANDARD MOTOR PRODUCTS | TX273 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Engine BlockOn Side of Block | View on Amazon |
| WELLS | 5S1616 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Connector Shape: Rectangular | View on Amazon |
| WELLS | 5S17570 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Located in Radiator | View on Amazon |
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.
7 Temperature Sender / Sensor parts are listed for the 2025 Lexus RX500H, from STANDARD MOTOR PRODUCTS, WELLS, GPD and 2 other brands. ACDELCO D583 carries the "Popular" badge.
Economy: 2 parts, from GPD and HOLSTEIN. A representative part number is GPD 1814549.
The Standard Replacement section: 5 options from STANDARD MOTOR PRODUCTS, WELLS and ACDELCO. ACDELCO D583 is listed in this group.
Listed part numbers: ACDELCO D583, GPD 1814549 and HOLSTEIN 2CTS0051, plus the other parts above.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | 1704220 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GMB | 1704220 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon |
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.
2 Water Pump parts for the 2025 Lexus RX500H come from 2 brands — FVP and GMB.
Part numbers include FVP 1704220, among others listed above.
Buying Cooling System Parts for a 2025 Lexus RX500H
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Confirm you have the 2.4L L4 ELECTRIC/GAS Turbocharged engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 2025 Lexus RX500H?
Our catalog currently lists 30 cooling system parts for the 2025 Lexus RX500H across 7 subcategories and 16 brands, covering the 2.4L L4 ELECTRIC/GAS Turbocharged engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2025 Lexus RX500H?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2025 Lexus RX500H was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2025 Lexus RX500H?
Every part on this page is matched to the 2.4L L4 ELECTRIC/GAS Turbocharged engine. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2025 Lexus RX500H
Cooling System Parts for Other Lexus RX500H Years
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