2025 Toyota Highlander 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

12 Coolant / Antifreeze parts are listed for the 2025 Toyota Highlander, from PRESTONE, VALVOLINE, AISIN and 1 other brand. PRESTONE AF2100 carries the "Popular" badge. 10 parts fit every engine; the other 2 are engine-specific.

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 VALVOLINE supply 2 parts: 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 5 options from AISIN, VALVOLINE and PENTOSIN — built to original-equipment specification. AISIN ACT002 is listed in this group.

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 for the 2025 Toyota Highlander come from 3 brands — CALORSTAT, GATES and MOTORAD. 1 part fits every engine; the other 2 are engine-specific.

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

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

3 Inverter Cooler parts for the 2025 Toyota Highlander come from 3 brands — CSF, GPD and TECHPRO.

Part numbers include CSF 3971, GPD 14045C and TECHPRO TO3011110.

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 are listed for the 2025 Toyota Highlander, from CSF, GPD, TECHPRO and 2 other brands.

Economy: 2 parts, from GPD and TECHPRO. A representative part number is GPD 13842C.

The Standard Replacement section: 2 options from CSF and SPECTRA PREMIUM. CSF 3970 is listed in this group.

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

Listed part numbers: GPD 13842C, TECHPRO TO3010375 and CSF 3970, plus the other 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

7 Radiator Cap parts are listed for the 2025 Toyota Highlander, from MOTORAD, CALORSTAT and GATES.

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 ST36 is listed in this group.

The Standard Replacement section: 3 options from CALORSTAT, GATES and MOTORAD. CALORSTAT RC0047 is listed in this group.

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

Part numbers include MOTORAD ST36, CALORSTAT RC0047 and GATES 31411, among others listed above.

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

4 Radiator Fan Assembly parts for the 2025 Toyota Highlander come from 3 brands — UAC, GPD and TYC.

The Economy section: 1 option from GPD. GPD 2812473 is listed in this group.

Standard Replacement: 1 part, from UAC. A representative part number is UAC FA50859C.

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

Listed part numbers: GPD 2812473, UAC FA50859C and TYC 624980, plus the other parts above.

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

This group shows a single part: CONTINENTAL 67231.

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

8 Temperature Sender / Sensor parts are listed for the 2025 Toyota Highlander, from STANDARD MOTOR PRODUCTS, NISSENS, WELLS and 2 other brands. ACDELCO D583 carries the "Popular" badge. 1 part fits every engine; the other 7 are engine-specific.

Economy: 1 part, from HOLSTEIN. A representative part number is HOLSTEIN 2CTS0016.

The Standard Replacement section: 3 options from ACDELCO, STANDARD MOTOR PRODUCTS and NISSENS. ACDELCO D583 is listed in this group.

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

Listed part numbers: ACDELCO D583, HOLSTEIN 2CTS0016 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

This group shows a single part: MOTORAD 1231180.

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

This group shows a single part: MOTORAD CH1051.

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

17 Water Pump parts for the 2025 Toyota Highlander come from 9 brands — FVP, AISIN, FOUR SEASONS and 6 other brands. The "Popular" part is BECK/ARNLEY 1312557.

The Economy section: 2 options from BECK/ARNLEY and SKP. BECK/ARNLEY 1312557 is listed in this group.

Standard Replacement: 3 parts, from AISIN, FOUR SEASONS and GMB. A representative part number is AISIN WPT207.

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

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

One part is listed for the 2025 Toyota Highlander — MAHLE / CLEVITE K33776.