This page lists 21 cooling system parts for the 2026 Toyota Highlander, across 7 part types, covering both the 2.4L L4 Turbocharged and the 2.5L L4 ELECTRIC/GAS. Every part shows its brand, manufacturer part number and fitment notes.
On the 2026 Toyota Highlander, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. 17 parts of the 21 listed are Coolant / Antifreeze (10 parts), Water Pump (5 parts) and Radiator (2 parts). The other 4 part types cover the remaining 4 parts.
The 2026 Toyota Highlander was sold with both the 2.4L L4 Turbocharged and the 2.5L L4 ELECTRIC/GAS. 2 parts fit every engine; the other 19 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 Toyota Highlander cooling system parts are VALVOLINE (4 parts), AISIN (4 parts) and GATES (3 parts), plus 6 more brands. Quality grades include Standard Replacement and Economy.
2 parts on this 2026 Toyota Highlander page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including AISIN ACT002 (Coolant / Antifreeze) and AISIN ACT002 (Coolant / Antifreeze). Click any part number to see every vehicle that part fits.
Coolant / Antifreeze
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 2.4L L4 Turbocharged | 719009 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle Yellow1 Gallon | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Popular Fits: 2.4L L4 Turbocharged | ACT002 | 🇺🇸 US 🇨🇦 CA | PinkHOAT | View on Amazon |
| AISIN Fits: 2.4L L4 Turbocharged | ACT002C | 🇺🇸 US 🇨🇦 CA | Pink - Canada OnlyHOAT | View on Amazon |
| PENTOSIN Fits: 2.4L L4 Turbocharged | 8115209 | 🇺🇸 US 🇨🇦 CA | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE Fits: 2.4L L4 Turbocharged | 675130 | 🇺🇸 US 🇨🇦 CA | Asian Vehicle Red1 Gallon | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Popular Fits: 2.5L L4 ELECTRIC/GAS | ACT002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | PinkHOAT | View on Amazon |
| AISIN Fits: 2.5L L4 ELECTRIC/GAS | ACT002C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pink - Canada OnlyHOAT | View on Amazon |
| PENTOSIN Fits: 2.5L L4 ELECTRIC/GAS | 8115209 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE Fits: 2.5L L4 ELECTRIC/GAS | 675130 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Asian Vehicle Red1 Gallon | View on Amazon |
| VALVOLINE Fits: 2.5L L4 ELECTRIC/GAS | 898406 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Hybrid Vehicle1 Gallon | View on Amazon |
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.
10 Coolant / Antifreeze parts for the 2026 Toyota Highlander come from 3 brands — VALVOLINE, AISIN and PENTOSIN. The "Popular" part is AISIN ACT002.
The Economy section lists 1 option from VALVOLINE — the catalog's value-priced group. VALVOLINE 719009 is listed in this group.
In the Standard Replacement grade, AISIN, PENTOSIN and VALVOLINE supply 4 parts: built to original-equipment specification. A representative part number is AISIN ACT002.
5 further parts sit outside the graded sections, with the same engine-level match.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 2.5L L4 ELECTRIC/GAS | 31541 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE TypeThreaded (Closed System) - (SAE Range 18-20 psi) | View on Amazon |
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.
One part is listed for the 2026 Toyota Highlander — GATES 31541.
Radiator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| CSF Fits: 2.4L L4 Turbocharged | 4016 | 🇺🇸 US 🇨🇦 CA | 11% Thicker Core 30mm vs OEM 27mm | View on Amazon |
| CSF Fits: 2.4L L4 Turbocharged | 4017 | 🇺🇸 US 🇨🇦 CA | Upgraded weld tube To B-fold tube | View on Amazon |
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.
2 Radiator parts for the 2026 Toyota Highlander come from CSF.
Radiator Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: all 2026 Highlander engines | 31411 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | OE Type | View on Amazon |
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.
This group shows a single part: GATES 31411.
Radiator Fan Assembly
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TYC Fits: 2.5L L4 ELECTRIC/GAS | 624980 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Dual Radiator and Condenser Fan Assembly | View on Amazon |
This table covers the fan assemblies (and clutches, where listed) that pull air through the radiator.
One part is listed for the 2026 Toyota Highlander — TYC 624980.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| NISSENS Fits: all 2026 Highlander engines | 207139 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Location-Control Valve | View on Amazon |
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.
This group shows a single part: NISSENS 207139.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 2.5L L4 ELECTRIC/GAS | 1312557 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| GATES Fits: 2.4L L4 Turbocharged | 41564E | 🇺🇸 US 🇨🇦 CA | Electric | View on Amazon |
| US MOTOR WORKS Fits: 2.4L L4 Turbocharged | US8237 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| US MOTOR WORKS Fits: 2.5L L4 ELECTRIC/GAS | US8233 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| US MOTOR WORKS Fits: 2.5L L4 ELECTRIC/GAS | US82332 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Includes Back Housing | View on Amazon |
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.
5 Water Pump parts are listed for the 2026 Toyota Highlander, from US MOTOR WORKS, BECK/ARNLEY and GATES.
Part numbers include BECK/ARNLEY 1312557, GATES 41564E and US MOTOR WORKS US8237, among others listed above.
Buying Cooling System Parts for a 2026 Toyota Highlander
On this vehicle, the cooling system system keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses.
- Match the engine first. Some cooling system parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Coolant / Antifreeze and Water Pump .
Frequently Asked Questions
How many cooling system parts fit the 2026 Toyota Highlander?
Our catalog currently lists 21 cooling system parts for the 2026 Toyota Highlander across 7 subcategories and 9 brands, covering both the 2.4L L4 Turbocharged and the 2.5L L4 ELECTRIC/GAS. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2026 Toyota Highlander engines?
Some do. 2 parts fit every engine; the other 19 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.
What are the signs of cooling system problems on a 2026 Toyota Highlander?
Common symptoms include a rising temperature gauge in traffic, sweet-smelling steam, crusty deposits around hose clamps, or a heater that blows cold. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What should I replace at the same time?
Where labor overlaps, replace the thermostat and refill with fresh coolant whenever you change a water pump or radiator; original hoses on an older vehicle are on borrowed time.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2026 Toyota Highlander was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 2026 Toyota Highlander?
First match the engine — each row shows which engine(s) the part fits. Then replace coolant with the exact specification the manufacturer calls for — mixing chemistries can gel and block small passages. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2026 Toyota Highlander
Cooling System Parts for Other Toyota Highlander Years
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