2023 Lexus RX350 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 2023 Lexus RX350 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 3 options from PEAK, PRESTONE and VALVOLINE — the catalog's value-priced group. PEAK BQA1GAL is listed in this group.

In the Heavy Duty grade, PRESTONE supplies 1 part: rated for severe service. A representative part number is PRESTONE AFC12100.

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, AISIN, VALVOLINE, BECK/ARNLEY and 2 other brands supply 5 parts: built to original-equipment specification. A representative part number is AISIN ACT002.

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

5 Coolant Reservoir Cap parts are listed for the 2023 Lexus RX350, from MOTORAD, CALORSTAT and GATES. MOTORAD T51 carries the "Popular" badge.

Listed part numbers: MOTORAD T51, CALORSTAT RC0170 and CALORSTAT RC0145, plus the other parts above.

This table covers the Inverter coolers. Typical signs include overheated fluid, a leak at the fittings, or mixed fluids in the reservoir. Flush the lines when you replace a cooler. Read more

One part is listed for the 2023 Lexus RX350 — TECHPRO TO3011109.

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

6 Radiator parts for the 2023 Lexus RX350 come from 5 brands — FVP, GPD, TECHPRO and 2 other brands. The "Popular" part is CSF 3954.

The Economy section: 2 options from GPD and TECHPRO. GPD 13913C is listed in this group.

Standard Replacement: 2 parts, from CSF and TYC. A representative part number is CSF 3954.

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

This group includes CSF 3954, GPD 13913C and TECHPRO LX3010164 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 2023 Lexus RX350 come from 4 brands — CALORSTAT, GATES, MOTORAD and 1 other brand.

Listed part numbers: CALORSTAT RC0047, GATES 31411 and MOTORAD T36, plus the other parts above.

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

One part is listed for the 2023 Lexus RX350 — TYC 625010.

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

11 Temperature Sender / Sensor parts for the 2023 Lexus RX350 come from 8 brands — STANDARD MOTOR PRODUCTS, WELLS, ULTRA-POWER and 5 other brands. The "Popular" part is ULTRA-POWER 5S1616.

The Economy section: 3 options from ULTRA-POWER, GPD and HOLSTEIN. ULTRA-POWER 5S1616 is listed in this group.

Standard Replacement: 8 parts, from STANDARD MOTOR PRODUCTS, WELLS, DENSO and 2 other brands. A representative part number is DENSO 1931000.

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

MOTORAD supplies both parts for the 2023 Lexus RX350.

Part numbers include MOTORAD CH2175 and MOTORAD CH3014.

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 2023 Lexus RX350, from FVP, AISIN, GATES and 4 other brands. AISIN WPT211 carries the "Popular" badge.

This group includes AISIN WPT211, GATES 41564E and FOUR SEASONS 89072 and the remaining 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

This group shows a single part: VICTOR REINZ 711790100.