The 2026 Toyota 4RUNNER has 15 cooling system parts with verified fitment on this page — 4 part types and 10 brands, covering both the 2.4L L4 ELECTRIC/GAS Turbocharged and the 2.4L L4 Turbocharged. Each part includes a manufacturer part number and application notes.
The cooling system system on the 2026 Toyota 4RUNNER keeps operating temperature in the narrow band the engine was designed for, from radiator and water pump to thermostat and hoses. The largest groups are Coolant / Antifreeze (7 parts), Temperature Sender / Sensor (4 parts) and Water Pump (3 parts). The other 1 part type covers the remaining 1 part.
The 2026 Toyota 4RUNNER was sold with both the 2.4L L4 ELECTRIC/GAS Turbocharged and the 2.4L L4 Turbocharged. 11 parts fit every engine; the other 4 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2026 Toyota 4RUNNER cooling system parts are VALVOLINE (3 parts), AISIN (3 parts) and NISSENS (2 parts), plus 7 more brands. Quality grades include Standard Replacement, Economy and Heavy Duty.
2 parts on this 2026 Toyota 4RUNNER page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including AISIN ACT002 (Coolant / Antifreeze) and VALVOLINE 675130 (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 |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PRESTONE Fits: all 2026 4RUNNER engines | AFC12100 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Command Nitrite Free Extended Life CoolantYellow Nitrite Free OAT | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Popular Fits: all 2026 4RUNNER engines | ACT002 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | PinkHOAT | View on Amazon |
| VALVOLINE Popular Fits: all 2026 4RUNNER engines | 675130 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Asian Vehicle Red1 Gallon | View on Amazon |
| AISIN Fits: all 2026 4RUNNER engines | ACT002C | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pink - Canada OnlyHOAT | View on Amazon |
| PENTOSIN Fits: all 2026 4RUNNER engines | 8115209 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Pentofrost A41 Gallon | View on Amazon |
| VALVOLINE Fits: 2.4L L4 ELECTRIC/GAS Turbocharged | 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.
7 Coolant / Antifreeze parts for the 2026 Toyota 4RUNNER come from 4 brands — VALVOLINE, AISIN, PRESTONE and 1 other brand. The "Popular" part is AISIN ACT002. 5 parts fit every engine; the other 2 are engine-specific.
The Economy section lists 1 option from VALVOLINE — the catalog's value-priced group. VALVOLINE 719009 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 Standard Replacement grade, AISIN, VALVOLINE and PENTOSIN supply 5 parts: built to original-equipment specification. A representative part number is AISIN ACT002.
This group includes AISIN ACT002, VALVOLINE 719009 and PRESTONE AFC12100 and the remaining parts above.
Coolant Reservoir Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GATES Fits: 2.4L L4 ELECTRIC/GAS Turbocharged | 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 4RUNNER — GATES 31541.
Temperature Sender / Sensor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: all 2026 4RUNNER engines | D583 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| NISSENS Fits: all 2026 4RUNNER engines | 207098 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Location-Engine | View on Amazon |
| NISSENS Fits: all 2026 4RUNNER engines | 207139 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Location: Radiator Coolant Hose | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2026 4RUNNER engines | TX40 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Rectangular Connector2 Terminal | 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.
4 Temperature Sender / Sensor parts for the 2026 Toyota 4RUNNER come from 3 brands — NISSENS, ACDELCO and STANDARD MOTOR PRODUCTS. Every part fits both the 2.4L L4 ELECTRIC/GAS Turbocharged and the 2.4L L4 Turbocharged.
This group includes ACDELCO D583, NISSENS 207098 and NISSENS 207139 and the remaining parts above.
Water Pump
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AISIN Fits: 2.4L L4 Turbocharged | WPT211 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| FVP Fits: all 2026 4RUNNER engines | US8237 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Limited or TRD Off-Road or TRD Off-Road Premium | View on Amazon |
| US MOTOR WORKS Fits: all 2026 4RUNNER engines | US8237 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Limited or TRD Off-Road or TRD Off-Road Premium | 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.
3 Water Pump parts are listed for the 2026 Toyota 4RUNNER, from AISIN, FVP and US MOTOR WORKS. 2 parts fit every engine; the other 1 is engine-specific.
Listed part numbers: AISIN WPT211 and FVP US8237, plus the other parts above.
Buying Cooling System Parts for a 2026 Toyota 4RUNNER
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 Temperature Sender / Sensor .
Frequently Asked Questions
How many cooling system parts fit the 2026 Toyota 4RUNNER?
Our catalog currently lists 15 cooling system parts for the 2026 Toyota 4RUNNER across 4 subcategories and 10 brands, covering both the 2.4L L4 ELECTRIC/GAS Turbocharged and the 2.4L L4 Turbocharged. Each part is matched to the engine(s) it fits.
Do cooling system parts differ between 2026 Toyota 4RUNNER engines?
Some do. 11 parts fit every engine; the other 4 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 4RUNNER?
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 4RUNNER 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 4RUNNER?
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 4RUNNER
Cooling System Parts for Other Toyota 4RUNNER Years
Switch vehicle or jump to a subcategory
Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.