2015 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

19 Coolant / Antifreeze parts for the 2015 Toyota Highlander come from 7 brands — PRESTONE, PEAK, VALVOLINE and 4 other brands. The "Popular" part is FVP MV5050GAL. 17 parts fit every engine; the other 2 are engine-specific.

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 4 options from FVP, PEAK, PRESTONE and 1 other brand — the catalog's value-priced group. FVP MV5050GAL 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 8 parts: built to original-equipment specification. A representative part number is AISIN ACT002.

This table covers the hard pipes and extra hoses in the coolant circuit. Read more

5 Coolant Hose / Pipe parts for the 2015 Toyota Highlander come from 3 brands — GATES, ACDELCO and DAYCO. The "Popular" part is GATES 19670.

This group includes GATES 19670, ACDELCO 14206S and ACDELCO 14187S and the remaining parts above.

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

MOTORAD supplies both parts for the 2015 Toyota Highlander. 1 part fits every engine; the other 1 is engine-specific.

Listed part numbers: MOTORAD T162 and MOTORAD T51.

This table covers the Cooling Fan control modules. Read more

10 Cooling Fan Control Module parts are listed for the 2015 Toyota Highlander, from ACKOJA, GATES, STANDARD MOTOR PRODUCTS and 3 other brands. ACKOJA A70790004 carries the "Popular" badge. 2 parts fit every engine; the other 8 are engine-specific.

This table covers the adapters used to pressure-test this cooling system. Read more

3 Cooling System Tester Adapter parts for the 2015 Toyota Highlander come from 2 brands — MOTORAD and GATES. 2 parts fit every engine; the other 1 is engine-specific.

This group includes GATES 31409, MOTORAD 3124 and MOTORAD 3125.

This table covers the intercoolers that cool turbo or supercharger charge air. Read more

This group shows a single part: OSC 13625.

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

5 Inverter Cooler parts are listed for the 2015 Toyota Highlander, from DENSO, AGILITY, GPD and 2 other brands. DENSO 2219596 carries the "Popular" badge.

Listed part numbers: DENSO 2219596, AGILITY 8013625 and GPD 2611437, plus the other parts above.

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

20 Radiator parts for the 2015 Toyota Highlander come from 12 brands — KOYORAD, UAC, GPD and 9 other brands. The "Popular" part is CSF 3773. 2 parts fit every engine; the other 18 are engine-specific.

The Economy section: 3 options from GPD and TECHPRO. GPD 13449C is listed in this group.

Standard Replacement: 17 parts, from KOYORAD, UAC, DENSO and 7 other brands. A representative part number is CSF 3773.

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

6 Radiator Cap parts for the 2015 Toyota Highlander come from 5 brands — MOTORAD, ACDELCO, GATES and 2 other brands. The "Popular" part is GATES 31412. 3 parts fit every engine; the other 3 are engine-specific.

In the Locking Replacement grade, ACDELCO and MOTORAD supply 2 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 12R07.

Standard Replacement: 4 parts, from GATES, CALORSTAT, MOTORAD and 1 other brand. A representative part number is GATES 31412.

This group includes GATES 31412, ACDELCO 12R07 and MOTORAD ST37 and the remaining parts above.

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

18 Radiator Fan Assembly parts are listed for the 2015 Toyota Highlander, from GPD, DORMAN, TECHPRO and 8 other brands. DORMAN 621540 carries the "Popular" badge. 2 parts fit every engine; the other 16 are engine-specific.

Economy: 9 parts, from GPD, DORMAN, TECHPRO and 2 other brands. A representative part number is DORMAN 621540.

The Standard Replacement section: 9 options from AGILITY, FOUR SEASONS, TYC and 3 other brands. AGILITY 6010331 is listed in this group.

This table covers the Radiator Fan motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor. Read more

This group shows a single part: ACKOJA A70010041.

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

9 Radiator Hose parts are listed for the 2015 Toyota Highlander, from CONTINENTAL, GATES, DAYCO and 1 other brand. CONTINENTAL 66196 carries the "Popular" badge.

Listed part numbers: CONTINENTAL 66196, GATES 24389 and ACDELCO 22844M, 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

18 Temperature Sender / Sensor parts for the 2015 Toyota Highlander come from 16 brands — STANDARD MOTOR PRODUCTS, ACDELCO, GPD and 13 other brands. The "Popular" part is DELPHI TS10289. Every part fits all 3 engine options (2.7L L4, 3.5L V6 and 3.5L V6 ELECTRIC/GAS).

The Economy section: 5 options from GPD, HOLSTEIN, ULTRA-POWER and 2 other brands. GPD 1712504 is listed in this group.

Standard Replacement: 13 parts, from STANDARD MOTOR PRODUCTS, ACDELCO, DELPHI and 8 other brands. A representative part number is DELPHI TS10289.

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

26 Thermostat parts are listed for the 2015 Toyota Highlander, from MOTORAD, CALORSTAT, FACET and 6 other brands. MOTORAD 5281180 carries the "Popular" badge. Grades run from Heavy Duty through Standard Replacement; Standard Replacement is the most populated section, led by MOTORAD, CALORSTAT, FACET and 6 other brands.

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

22 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2015 Toyota Highlander come from 9 brands — MAHLE / CLEVITE, VICTOR REINZ, BECK/ARNLEY and 6 other brands. The "Popular" part is AISIN THP101. 8 parts fit every engine; the other 14 are engine-specific.

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

23 Thermostat Housing / Water Outlet parts are listed for the 2015 Toyota Highlander, from FOUR SEASONS, BECK/ARNLEY, MOTORAD and 3 other brands. DORMAN 9025929 carries the "Popular" badge.

Economy: 3 parts, from DORMAN and SKP. A representative part number is DORMAN 9025929.

The Standard Replacement section: 13 options from FOUR SEASONS, MOTORAD, BECK/ARNLEY and 1 other brand. BECK/ARNLEY 1470080 is listed in this group.

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

This table covers the gaskets that seal the Water Inlet. 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 Inlet Gasket parts for the 2015 Toyota Highlander come from 2 brands — APEX and FEL-PRO.

Part numbers include APEX AWO2237 and FEL-PRO 35801.

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

26 Water Pump parts are listed for the 2015 Toyota Highlander, from SKP, AISIN, GATES and 10 other brands. SKP SK1704010 carries the "Popular" badge. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by AISIN, GATES, DAYCO and 4 other brands.

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

16 Water Pump Gasket parts for the 2015 Toyota Highlander come from 6 brands — FEL-PRO, APEX, MAHLE / CLEVITE and 3 other brands. The "Popular" part is FEL-PRO 36013.