2021 Toyota Avalon Cooling System Parts

This table covers the Battery 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 2021 Toyota Avalon — MOTORAD TA9245.

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

18 Coolant / Antifreeze parts for the 2021 Toyota Avalon come from 7 brands — PRESTONE, PEAK, VALVOLINE and 4 other brands. The "Popular" part is FVP MV5050GAL. 16 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 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, BECK/ARNLEY, VALVOLINE and 2 other brands supply 8 parts: built to original-equipment specification. A representative part number is AISIN ACT002.

This table covers the Coolant filler necks. Read more

One part is listed for the 2021 Toyota Avalon — MOTORAD CH2096.

This table covers the seals at the Coolant Hose Connector / Flange. 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

One part is listed for the 2021 Toyota Avalon — ELRING 106660.

This table covers the overflow / expansion tanks that hold extra coolant. Read more

One part is listed for the 2021 Toyota Avalon — TECHPRO TO3014138.

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 2021 Toyota Avalon, from MOTORAD and CALORSTAT. 1 part fits every engine; the other 2 are engine-specific.

Part numbers include CALORSTAT RC0145, MOTORAD T125 and MOTORAD T51.

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

2 Cooling System Tester Adapter parts for the 2021 Toyota Avalon come from MOTORAD.

Listed part numbers: MOTORAD 3124 and MOTORAD 3125.

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 2021 Toyota Avalon come from 10 brands — CSF, TYC, AGILITY and 7 other brands. The "Popular" part is CSF 3858.

The Economy section: 1 option from TECHPRO. TECHPRO TO3010364 is listed in this group.

Standard Replacement: 9 parts, from CSF, TYC, AGILITY and 6 other brands. A representative part number is CSF 3858.

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

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

9 Radiator Cap parts for the 2021 Toyota Avalon come from 4 brands — MOTORAD, GATES, SKP and 1 other brand. The "Popular" part is GATES 31411.

In the Locking Replacement grade, MOTORAD supplies 2 parts: grouped under the catalog's "Locking Replacement" designation — the notes column spells out what sets them apart. A representative part number is MOTORAD ST36.

Standard Replacement: 7 parts, from GATES, MOTORAD, SKP and 1 other brand. A representative part number is GATES 31411.

This group includes GATES 31411, MOTORAD ST36 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

16 Radiator Fan Assembly parts are listed for the 2021 Toyota Avalon, from FOUR SEASONS, TYC, GPD and 6 other brands. AGILITY 6010458 carries the "Popular" badge. 1 part fits every engine; the other 15 are engine-specific.

Economy: 6 parts, from GPD, TECHPRO and VARIOUS MFR. A representative part number is GPD 2812044.

The Standard Replacement section: 10 options from FOUR SEASONS, TYC, AGILITY and 3 other brands. AGILITY 6010458 is listed in this group.

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

5 Radiator Hose parts are listed for the 2021 Toyota Avalon, from GATES and CONTINENTAL.

Listed part numbers: CONTINENTAL 62145, GATES 52064 and GATES 51815, plus the other parts above.

This table covers the Radiator insulators. Read more

One part is listed for the 2021 Toyota Avalon — TECHPRO TO3013100.

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

13 Temperature Sender / Sensor parts for the 2021 Toyota Avalon come from 7 brands — GPD, AISIN, STANDARD MOTOR PRODUCTS and 4 other brands. The "Popular" part is AISIN THSAZ8004.

The Economy section: 2 options from GPD. GPD 1814549 is listed in this group.

Standard Replacement: 11 parts, from AISIN, STANDARD MOTOR PRODUCTS, BECK/ARNLEY and 3 other brands. A representative part number is AISIN THSAZ8004.

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

14 Thermostat parts are listed for the 2021 Toyota Avalon, from MOTORAD, AISIN, BECK/ARNLEY and 5 other brands. AISIN THT023 carries the "Popular" badge.

Economy: 2 parts, from AUTOTECNICA and DORMAN. A representative part number is AUTOTECNICA TY0719461.

The Standard Replacement section: 12 options from MOTORAD, AISIN, BECK/ARNLEY and 3 other brands. AISIN THT023 is listed in this group.

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

4 Thermostat / Thermostat Housing / Water Outlet Seal parts for the 2021 Toyota Avalon come from 2 brands — MAHLE / CLEVITE and ELRING.

Listed part numbers: ELRING 306360, MAHLE / CLEVITE C33798 and MAHLE / CLEVITE C33835, plus the other parts above.

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

11 Thermostat Housing / Water Outlet parts are listed for the 2021 Toyota Avalon, from GATES, MOTORAD and SKP. SKP SK86328 carries the "Popular" badge.

Economy: 1 part, from SKP. A representative part number is SKP SK86328.

The Standard Replacement section: 8 options from GATES and MOTORAD. GATES CO35076 is listed in this group.

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

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

19 Water Pump parts are listed for the 2021 Toyota Avalon, from FVP, AISIN, BECK/ARNLEY and 6 other brands. BECK/ARNLEY 1312557 carries the "Popular" badge. 1 part fits every engine; the other 18 are engine-specific.

Economy: 6 parts, from BECK/ARNLEY, SKP, FVP and 1 other brand. A representative part number is BECK/ARNLEY 1312557.

The Standard Replacement section: 9 options from AISIN, GMB, GATES and 3 other brands. AISIN WPT207 is listed in this group.

4 ungrouped parts are not assigned to a grade, 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

3 Water Pump Gasket parts for the 2021 Toyota Avalon come from 3 brands — ELRING, MAHLE / CLEVITE and VICTOR REINZ.

This group includes ELRING 917940, MAHLE / CLEVITE K33776 and VICTOR REINZ 711790100.