2023 Toyota 4RUNNER 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 2023 Toyota 4RUNNER, from PRESTONE, PEAK, VALVOLINE and 3 other brands. PRESTONE AF2100 carries the "Popular" badge.

In the Economy grade, PEAK, PRESTONE and VALVOLINE supply 3 parts: the catalog's value-priced group. A representative part number is PEAK BQA1GAL.

The Heavy Duty section lists 1 option from PRESTONE — rated for severe service. PRESTONE AFC12100 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 7 options from AISIN, BECK/ARNLEY, VALVOLINE and 2 other brands — built to original-equipment specification. AISIN ACT002 is listed in this group.

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

3 Coolant Reservoir parts for the 2023 Toyota 4RUNNER come from 3 brands — AUTOTECNICA, LARES and TECHPRO.

Listed part numbers: AUTOTECNICA TY0723939, LARES 37862 and TECHPRO TO3014125.

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 T157.

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 are listed for the 2023 Toyota 4RUNNER, from CSF, TYC, FVP and 3 other brands. CSF 3698 carries the "Popular" badge.

Part numbers include CSF 3698, TYC 13251 and FVP RAD13251, among others listed 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 are listed for the 2023 Toyota 4RUNNER, from MOTORAD, GATES and SKP.

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 ST37 is listed in this group.

The Standard Replacement section: 3 options from GATES, MOTORAD and SKP. GATES 31412 is listed in this group.

Part numbers include MOTORAD ST37, GATES 31412 and MOTORAD T37, among others listed above.

This table covers the Radiator Fan blades. Typical signs include chatter, streaks, or a skip at the top of the stroke. Confirm left and right lengths in the notes — they are often different. Read more

This group shows a single part: DORMAN 620565.

This table covers the Radiator Fan clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc. Read more

6 Radiator Fan Clutch parts are listed for the 2023 Toyota 4RUNNER, from HAYDEN, US MOTOR WORKS, FOUR SEASONS and 3 other brands. HAYDEN 6631 carries the "Popular" badge.

Part numbers include HAYDEN 6631, US MOTOR WORKS 22411 and FOUR SEASONS 46106, among others listed above.

This table covers the shrouds that duct air through the fan and radiator. Read more

One part is listed for the 2023 Toyota 4RUNNER — DORMAN 621658.

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

5 Radiator Hose parts for the 2023 Toyota 4RUNNER come from 3 brands — CONTINENTAL, DAYCO and GATES. The "Popular" part is GATES 23723.

Listed part numbers: GATES 23723, CONTINENTAL 66502 and CONTINENTAL 66666, plus the other parts above.

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

7 Temperature Sender / Sensor parts are listed for the 2023 Toyota 4RUNNER, from ULTRA-POWER, HOLSTEIN, STANDARD MOTOR PRODUCTS and 4 other brands. ULTRA-POWER 5S1616 carries the "Popular" badge.

Economy: 2 parts, from ULTRA-POWER and HOLSTEIN. A representative part number is ULTRA-POWER 5S1616.

The Standard Replacement section: 5 options from STANDARD MOTOR PRODUCTS, ACDELCO, DENSO and 2 other brands. STANDARD MOTOR PRODUCTS TX40 is listed in this group.

Listed part numbers: ULTRA-POWER 5S1616, HOLSTEIN 2CTS0051 and STANDARD MOTOR PRODUCTS TX40, 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

7 Thermostat parts for the 2023 Toyota 4RUNNER come from 7 brands — AUTOTECNICA, AISIN, MOTORAD and 4 other brands. The "Popular" part is AISIN THT003.

The Economy section: 1 option from AUTOTECNICA. AUTOTECNICA TY0720316 is listed in this group.

Standard Replacement: 6 parts, from AISIN, MOTORAD, ACKOJA and 3 other brands. A representative part number is AISIN THT003.

Part numbers include AISIN THT003, AUTOTECNICA TY0720316 and MOTORAD 634180, among others listed 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

7 Thermostat / Thermostat Housing / Water Outlet Seal parts are listed for the 2023 Toyota 4RUNNER, from FEL-PRO, MAHLE / CLEVITE and BECK/ARNLEY. FEL-PRO 35767 carries the "Popular" badge.

Part numbers include FEL-PRO 35767, FEL-PRO 35809 and BECK/ARNLEY 0390146, among others listed above.

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

2 Thermostat Housing / Water Outlet parts for the 2023 Toyota 4RUNNER come from 2 brands — GATES and MOTORAD.

Listed part numbers: GATES CO35090 and MOTORAD CH1038.

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 2023 Toyota 4RUNNER come from 7 brands — BECK/ARNLEY, FAMOUS BRAND, FVP and 4 other brands. The "Popular" part is AISIN WPT169.

The Economy section: 4 options from BECK/ARNLEY, FAMOUS BRAND, FVP and 1 other brand. BECK/ARNLEY 1312488 is listed in this group.

Standard Replacement: 3 parts, from AISIN, GATES and DAYCO. A representative part number is AISIN WPT169.

Listed part numbers: AISIN WPT169, BECK/ARNLEY 1312488 and FAMOUS BRAND T5130, 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

2 Water Pump Gasket parts are listed for the 2023 Toyota 4RUNNER, from FEL-PRO and MAHLE / CLEVITE.

Part numbers include FEL-PRO 36014 and MAHLE / CLEVITE K33151.