2019 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 2019 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 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 are listed for the 2019 Toyota Highlander, from MOTORAD and CALORSTAT. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include CALORSTAT RC0145, MOTORAD T162 and MOTORAD T51.

This table covers the Cooling Fan control modules. Read more

8 Cooling Fan Control Module parts are listed for the 2019 Toyota Highlander, from STANDARD MOTOR PRODUCTS, ACKOJA, BECK/ARNLEY and 2 other brands.

Listed part numbers: ACKOJA A70790003, ACKOJA A70790004 and BECK/ARNLEY 2030295, plus the other parts above.

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

2 Cooling System Tester Adapter parts for the 2019 Toyota Highlander come from MOTORAD. Every part fits all 3 engine options (2.7L L4, 3.5L V6 and 3.5L V6 ELECTRIC/GAS).

Part numbers include 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

One part is listed for the 2019 Toyota Highlander — GPD 2611437.

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

16 Radiator parts for the 2019 Toyota Highlander come from 10 brands — GPD, CSF, DENSO and 7 other brands. The "Popular" part is CSF 3773.

The Economy section: 2 options from GPD. GPD 13657C is listed in this group.

Standard Replacement: 14 parts, from CSF, DENSO, NISSENS and 6 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 2019 Toyota Highlander come from 5 brands — MOTORAD, ACDELCO, GATES and 2 other brands. The "Popular" part is GATES 31412. 4 parts fit every engine; the other 2 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.

Part numbers include GATES 31412, ACDELCO 12R07 and MOTORAD ST37, among others listed above.

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

16 Radiator Fan Assembly parts are listed for the 2019 Toyota Highlander, from DORMAN, GPD, TECHPRO and 7 other brands. DORMAN 621540 carries the "Popular" badge. 1 part fits every engine; the other 15 are engine-specific.

Economy: 7 parts, from DORMAN, GPD, TECHPRO and 1 other brand. 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

10 Radiator Hose parts are listed for the 2019 Toyota Highlander, from CONTINENTAL, GATES, ACDELCO and 1 other brand. CONTINENTAL 66196 carries the "Popular" badge.

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

20 Temperature Sender / Sensor parts for the 2019 Toyota Highlander come from 14 brands — STANDARD MOTOR PRODUCTS, GPD, DELPHI and 11 other brands. The "Popular" part is ULTRA-POWER 5S1616. 3 parts fit every engine; the other 17 are engine-specific.

The Economy section: 5 options from GPD, ULTRA-POWER, HOLSTEIN and 1 other brand. ULTRA-POWER 5S1616 is listed in this group.

Standard Replacement: 15 parts, from STANDARD MOTOR PRODUCTS, DELPHI, BECK/ARNLEY and 7 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

28 Thermostat parts are listed for the 2019 Toyota Highlander, from MOTORAD, CALORSTAT, FACET and 7 other brands. MOTORAD 7281180 carries the "Popular" badge. They are grouped as Economy, Heavy Duty, Premium and Standard Replacement, with Standard Replacement the largest group at 22 parts from 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

8 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2019 Toyota Highlander come from 7 brands — MAHLE / CLEVITE, FEL-PRO, MOTORAD and 4 other brands. The "Popular" part is FEL-PRO 35445.

Part numbers include FEL-PRO 35445, MOTORAD MG182 and APEX AWO2047, among others listed above.

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

6 Thermostat Housing / Water Outlet parts are listed for the 2019 Toyota Highlander, from DORMAN, SKP, MOTORAD and 3 other brands. MOTORAD CH2904 carries the "Popular" badge.

Economy: 2 parts, from DORMAN and SKP. A representative part number is DORMAN 9025904.

The Standard Replacement section: 3 options from MOTORAD, ACKOJA and FOUR SEASONS. MOTORAD CH2904 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

This group includes MOTORAD CH2904, DORMAN 9025904 and SKP SK9025904 and the remaining parts above.

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

This group shows a single part: AJUSA 01184900.

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

22 Water Pump parts are listed for the 2019 Toyota Highlander, from FVP, AISIN, SKP and 9 other brands. SKP SK1704010 carries the "Popular" badge.

Economy: 9 parts, from SKP, US MOTOR WORKS, BECK/ARNLEY and 2 other brands. A representative part number is SKP SK1704010.

The Standard Replacement section: 13 options from AISIN, GATES, DAYCO and 5 other brands. ACDELCO 252958 is listed in this group.

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

5 Water Pump Gasket parts for the 2019 Toyota Highlander come from 3 brands — FEL-PRO, APEX and ELRING. The "Popular" part is FEL-PRO 36013.

Part numbers include FEL-PRO 36013, APEX AWP3276 and APEX AWP3275, among others listed above.