21 Cooling system parts are listed for the 2024 Lexus RZ300E, in 4 part types, covering the ELECTRIC engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
The cooling system system on the 2024 Lexus RZ300E keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (14 parts), Coolant Reservoir Cap (3 parts) and Temperature Sender / Sensor (3 parts). The other 1 part type covers the remaining 1 part.
The 2024 Lexus RZ300E came with a single engine, the ELECTRIC, and every part is verified against it.
11 brands supply cooling system parts for the 2024 Lexus RZ300E, led by PRESTONE (6 parts), PEAK (4 parts) and VALVOLINE (3 parts), plus 8 more brands. Quality grades include Premium, Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2024 Lexus RZ300E. 3 parts have it, including PRESTONE AF3100 (Coolant / Antifreeze) and VALVOLINE ZXG051 (Coolant / Antifreeze). 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 | Prime YellowAll Vehicles | View on Amazon |
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF3100 | 🇺🇸 US | Prime Yellow - All VehiclesExtended Life | View on Amazon |
| PEAK | BQA1GAL | 🇺🇸 US | Blue Mountain Long LifeAll Vehicle | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular | ZXG051 | 🇺🇸 US | G05 Yellow1 Gallon | View on Amazon |
| PRESTONE | AFC12100 | 🇺🇸 US | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Premium
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Popular | AF2100 | 🇺🇸 US | All Vehicles10yr/300k mi | View on Amazon |
| PEAK | PKP1GAL | 🇺🇸 US | All Vehicles Antifreeze1 Gallon | View on Amazon |
| PEAK | PXA1GAL | 🇺🇸 US | Global Lifetime1 Gallon | View on Amazon |
| PRESTONE | AF6210 | 🇺🇸 US | MAX Original EquipmentAsian Red/Pink | View on Amazon |
| PRESTONE | AFMAX | 🇺🇸 US | Max Universal1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PEAK | PAR1GAL | 🇺🇸 US | OET Asian Extended Life Red1 Gallon | View on Amazon |
| PENTOSIN | 8115209 | 🇺🇸 US | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE | 904683 | 🇺🇸 US | HT-12 Pink1 Gallon | View on Amazon |
| VALVOLINE | 904685 | 🇺🇸 US | HT-12 Green1 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.
14 Coolant / Antifreeze parts are listed for the 2024 Lexus RZ300E, from PRESTONE, PEAK, VALVOLINE and 1 other brand. PRESTONE AF3100 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 PEAK supply 2 parts: the catalog's value-priced group. A representative part number is PRESTONE AF3100.
The Heavy Duty section lists 2 options from VALVOLINE and PRESTONE — rated for severe service. VALVOLINE ZXG051 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 4 options from VALVOLINE, PEAK and PENTOSIN — built to original-equipment specification. PEAK PAR1GAL is listed in this group.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CALORSTAT | RC0145 | 🇺🇸 US | Attachment Type: Threaded | View on Amazon |
| GATES | 31541 | 🇺🇸 US | OE TypeThreaded (Closed System) - (SAE Range 18-20 psi) | View on Amazon |
| MOTORAD | T51 | 🇺🇸 US | 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 2024 Lexus RZ300E come from 3 brands — CALORSTAT, GATES and MOTORAD.
Listed part numbers: CALORSTAT RC0145, GATES 31541 and MOTORAD T51.
Radiator Fan Assembly
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| UAC | FA51395C | 🇺🇸 US | 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: UAC FA51395C.
Temperature Sender / Sensor
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GPD | 1814549 | 🇺🇸 US | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WELLS | 5S17570 | 🇺🇸 US | Located in Radiator | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS | 207139 | 🇺🇸 US | 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.
3 Temperature Sender / Sensor parts are listed for the 2024 Lexus RZ300E, from GPD, WELLS and NISSENS.
Economy: 1 part, from GPD. A representative part number is GPD 1814549.
The Standard Replacement section: 1 option from WELLS. WELLS 5S17570 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Listed part numbers: GPD 1814549, WELLS 5S17570 and NISSENS 207139.
Buying Cooling System Parts for a 2024 Lexus RZ300E
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 ELECTRIC 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 Coolant Reservoir Cap .
Frequently Asked Questions
How many cooling system parts fit the 2024 Lexus RZ300E?
Our catalog currently lists 21 cooling system parts for the 2024 Lexus RZ300E across 4 subcategories and 11 brands, covering the ELECTRIC engine. Each part is matched to the engine(s) it fits.
What are the signs of cooling system problems on a 2024 Lexus RZ300E?
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 2024 Lexus RZ300E 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 2024 Lexus RZ300E?
Every part on this page is matched to the ELECTRIC 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 2024 Lexus RZ300E
Cooling System Parts for Other Lexus RZ300E Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.