The 2021 Toyota Avalon has 58 automatic transmission parts with verified fitment on this page — 11 part types and 20 brands, covering all 3 engine options (2.5L L4, 2.5L L4 ELECTRIC/GAS and 3.5L V6). Each part includes a manufacturer part number and application notes.
On the 2021 Toyota Avalon, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. Most of the listed parts are Transmission Fluid (18 parts), Transmission Mount (12 parts) and Transmission Fluid Additive (10 parts). The other 8 part types cover the remaining 18 parts.
The 2021 Toyota Avalon was sold with 3 engines. 15 parts fit every engine; the other 43 are engine-specific. Each part shows which engine(s) it fits.
20 brands supply automatic transmission parts for the 2021 Toyota Avalon, led by LUBEGARD (12 parts), PA CARGO (7 parts) and VALVOLINE (5 parts), plus 17 more brands. Quality grades include Multi-Vehicle, Standard Replacement and Economy.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Toyota Avalon. 6 parts have it, including ACDELCO 109243 (Transmission Fluid) and LUBEGARD 19610 (Transmission Fluid Additive). Each part number opens a page with every vehicle that part fits.
Drain Plug Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 2.5L L4, 3.5L V6 | 652531CD | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the gaskets that seal the Drain Plug. 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.
This group shows a single part: DORMAN 652531CD.
Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: 2.5L L4, 3.5L V6 | 57710H | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| VARIOUS MFR Fits: 2.5L L4, 3.5L V6 | PT99811 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| BECK/ARNLEY Fits: 2.5L L4, 3.5L V6 | 0440465 | 🇺🇸 US 🇨🇦 CA | Internal Filter | View on Amazon |
| RAYBESTOS POWERTRAIN Fits: 3.5L V6 | 515658 | 🇺🇸 US 🇨🇦 CA | Sump Filter | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: 2.5L L4 ELECTRIC/GAS | 57710H | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the replacement filters for this application — the table heading and notes say which circuit. Typical signs include restricted flow — long cranking, weak airflow, or dirty fluid after a short interval. Seat the new filter so it cannot bypass, and use the grade the notes call for.
5 Filter parts are listed for the 2021 Toyota Avalon, from PA CARGO, VARIOUS MFR, BECK/ARNLEY and 1 other brand.
In the Economy grade, PA CARGO and VARIOUS MFR supply 2 parts: the catalog's value-priced group. A representative part number is PA CARGO 57710H.
The Standard Replacement section lists 2 options from BECK/ARNLEY and RAYBESTOS POWERTRAIN — built to original-equipment specification. BECK/ARNLEY 0440465 is listed in this group.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Part numbers include PA CARGO 57710H, VARIOUS MFR PT99811 and BECK/ARNLEY 0440465, among others listed above.
Fluid Cooler
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: 2.5L L4, 3.5L V6 | 918696 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the heat exchangers that cool transmission fluid. Typical signs include fluid that overheats, a leak at the cooler fittings, or milky fluid that says coolant and ATF have mixed. Flush the lines when you replace a cooler. Cross-contamination is how a small leak becomes a transmission job.
One part is listed for the 2021 Toyota Avalon — DORMAN 918696.
Fluid Cooler Line / Hose
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SUNSONG Fits: all 2021 Avalon engines | 5801887 | 🇺🇸 US 🇨🇦 CA | OutletAt Transmission | View on Amazon |
| SUNSONG Fits: 3.5L V6 | 5801849 | 🇺🇸 US 🇨🇦 CA | OutletAt Pancake Cooler | View on Amazon |
| SUNSONG Fits: 3.5L V6 | 5801857 | 🇺🇸 US 🇨🇦 CA | OutletTransmission to Tube | View on Amazon |
This table covers the Fluid Cooler Line hoses. 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.
SUNSONG supplies the 3 Fluid Cooler Line / Hose parts for the 2021 Toyota Avalon. 1 part fits every engine; the other 2 are engine-specific.
Part numbers include SUNSONG 5801887, SUNSONG 5801849 and SUNSONG 5801857.
Fluid Pan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA Fits: 2.5L L4, 3.5L V6 | TY1223097 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| DORMAN Fits: 2.5L L4, 3.5L V6 | 265915 | 🇺🇸 US 🇨🇦 CA | Side cover | View on Amazon |
| SKP Fits: 2.5L L4, 3.5L V6 | SK265915 | 🇺🇸 US 🇨🇦 CA | Side cover | View on Amazon |
This table covers the pans that hold automatic-transmission fluid.
3 Fluid Pan parts for the 2021 Toyota Avalon come from 3 brands — AUTOTECNICA, DORMAN and SKP.
Part numbers include AUTOTECNICA TY1223097, DORMAN 265915 and SKP SK265915.
Fluid Pan Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: all 2021 Avalon engines | 57500HF | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the gaskets that seal the Fluid Pan. 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.
One part is listed for the 2021 Toyota Avalon — PA CARGO 57500HF.
Rebuild Kit
Banner Kit (Overhaul Kit + Friction Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: all 2021 Avalon engines | DK5700HS | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: all 2021 Avalon engines | DK5700H | 🇺🇸 US 🇨🇦 CA | View on Amazon |
Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: all 2021 Avalon engines | K57900H | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the rebuild kits for this assembly.
3 Rebuild Kit parts for the 2021 Toyota Avalon come from PA CARGO. Every part fits all 3 engine options (2.5L L4, 2.5L L4 ELECTRIC/GAS and 3.5L V6).
The Banner Kit (Overhaul Kit + Friction Clutch Plates) section lists 1 option from PA CARGO — grouped under the catalog's "Banner Kit (Overhaul Kit + Friction Clutch Plates)" designation — the notes column spells out what sets them apart. PA CARGO DK5700HS is listed in this group.
In the Master Kit (Overhaul Kit + Friction & Steel Clutch Plates) grade, PA CARGO supplies 1 part: grouped under the catalog's "Master Kit (Overhaul Kit + Friction & Steel Clutch Plates)" designation — the notes column spells out what sets them apart. A representative part number is PA CARGO DK5700H.
The Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings) section lists 1 option from PA CARGO — grouped under the catalog's "Overhaul Kit (Gaskets, Seals, O-Rings & Sealing Rings)" designation — the notes column spells out what sets them apart. PA CARGO K57900H is listed in this group.
Listed part numbers: PA CARGO DK5700HS, PA CARGO DK5700H and PA CARGO K57900H.
Servo Piston
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PA CARGO Fits: all 2021 Avalon engines | K57900N99 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the pistons in a transmission servo.
One part is listed for the 2021 Toyota Avalon — PA CARGO K57900N99.
Transmission Fluid
ATF 64
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PENTOSIN Fits: all 2021 Avalon engines | 1058113 | 🇺🇸 US 🇨🇦 CA | 1 LiterATF64 or ATF44 | View on Amazon |
| PENTOSIN Fits: all 2021 Avalon engines | 1058215 | 🇺🇸 US 🇨🇦 CA | 5 LitersATF64 or ATF44 | View on Amazon |
CVT
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD Fits: 2.5L L4 ELECTRIC/GAS | 68112 | 🇺🇸 US | Complete CVT Fluid32 oz | View on Amazon |
Dexron
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular Fits: 2.5L L4, 3.5L V6 | 109243 | 🇺🇸 US | Container Type: Plastic Container | View on Amazon |
Multi-Vehicle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL Popular Fits: all 2021 Avalon engines | 126505 | 🇺🇸 US 🇨🇦 CA | Multi-Vehicle ATF | View on Amazon |
| VALVOLINE Popular Fits: all 2021 Avalon engines | VV3246 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart | View on Amazon |
| VALVOLINE Popular Fits: all 2021 Avalon engines | 773775 | 🇺🇸 US 🇨🇦 CA | Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon | View on Amazon |
| LIQUI MOLY Fits: 2.5L L4, 3.5L V6 | 20032 | 🇺🇸 US 🇨🇦 CA | Top Tec ATF 18001 Liter | View on Amazon |
| LIQUI MOLY Fits: 2.5L L4, 3.5L V6 | 22036 | 🇺🇸 US 🇨🇦 CA | Top Tec ATF 18005 Liter | View on Amazon |
| LIQUI MOLY Fits: 2.5L L4, 3.5L V6 | 20034 | 🇺🇸 US 🇨🇦 CA | Top TEC ATF 180020 Liter | View on Amazon |
| LUBEGARD Fits: 2.5L L4, 3.5L V6 | 69032 | 🇺🇸 US 🇨🇦 CA | 1 QuartComplete Full Synthetic ATF Fluid | View on Amazon |
| LUCAS OIL Fits: 2.5L L4, 3.5L V6 | 11255 | 🇺🇸 US 🇨🇦 CA | LOW VISCOSITY SYNTHETIC MULTI-VEHICLE AUTOMATIC TRANSMISSION FLUID1 qt | View on Amazon |
| LUCAS OIL Fits: 2.5L L4, 3.5L V6 | 18037 | 🇺🇸 US 🇨🇦 CA | Low Viscosity Synthetic Multi-Vehicle Automatic Transmission Fluid6 Gallon | View on Amazon |
| VALVOLINE Fits: 2.5L L4, 3.5L V6 | 822389 | 🇺🇸 US 🇨🇦 CA | Import Multi-Vehicle ATF1 Quart | View on Amazon |
| VALVOLINE Fits: all 2021 Avalon engines | 881051 | 🇺🇸 US 🇨🇦 CA | Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box | View on Amazon |
World Standard (WS)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU Fits: all 2021 Avalon engines | 30040096750 | 🇺🇸 US | ATF Type TLS-LV1 Quart | View on Amazon |
| IDEMITSU Fits: all 2021 Avalon engines | 30040096953 | 🇺🇸 US | ATF Type TLS-LV5 Quart | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Fits: 2.5L L4, 3.5L V6 | 899179 | 🇺🇸 US 🇨🇦 CA | Extended Protection Full Synthetic ATF1 Quart | View on Amazon |
This table covers the automatic-transmission fluids specified for this gearbox. Typical signs include harsh or delayed shifts, fluid that smells burnt, or a shudder at light throttle. Use exactly the specification in the notes. Automatic transmissions are unforgiving of the wrong fluid.
18 Transmission Fluid parts are listed for the 2021 Toyota Avalon, from VALVOLINE, LIQUI MOLY, PENTOSIN and 5 other brands. ACDELCO 109243 carries the "Popular" badge. 8 parts fit every engine; the other 10 are engine-specific.
The ATF 64 section lists 2 options from PENTOSIN — grouped under the catalog's "ATF 64" designation — the notes column spells out what sets them apart. PENTOSIN 1058113 is listed in this group.
The CVT section lists 1 option from LUBEGARD — grouped under the catalog's "CVT" designation — the notes column spells out what sets them apart. LUBEGARD 68112 is listed in this group.
In the Dexron grade, ACDELCO supplies 1 part: grouped under the catalog's "Dexron" designation — the notes column spells out what sets them apart. A representative part number is ACDELCO 109243.
In the Multi-Vehicle grade, VALVOLINE, LIQUI MOLY, LUCAS OIL and 2 other brands supply 11 parts: grouped under the catalog's "Multi-Vehicle" designation — the notes column spells out what sets them apart. A representative part number is MOBIL 126505.
In the World Standard (WS) grade, IDEMITSU supplies 2 parts: grouped under the catalog's "World Standard (WS)" designation — the notes column spells out what sets them apart. A representative part number is IDEMITSU 30040096750.
1 ungrouped part is not assigned to a grade, with the same engine-level match.
Transmission Fluid Additive
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD Popular Fits: 2.5L L4, 3.5L V6 | 19610 | 🇺🇸 US 🇨🇦 CA | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Popular Fits: 2.5L L4, 3.5L V6 | 60902 | 🇺🇸 US 🇨🇦 CA | Automatic Transmission Fluid Protectant10 oz | View on Amazon |
| LUBEGARD Fits: 2.5L L4, 3.5L V6 | 19689 | 🇺🇸 US 🇨🇦 CA | Instant Shudder Fixx2 oz | View on Amazon |
| LUBEGARD Fits: all 2021 Avalon engines | 61910 | 🇺🇸 US 🇨🇦 CA | 10 ozHighly Friction Modified ATF Supplement | View on Amazon |
| LUBEGARD Fits: 2.5L L4, 3.5L V6 | 63010 | 🇺🇸 US 🇨🇦 CA | Platinum Universal ATF Protectant10 oz | View on Amazon |
| LUBEGARD Fits: 2.5L L4, 3.5L V6 | 63016 | 🇺🇸 US 🇨🇦 CA | Platinum Universal ATF Protectant15 oz | View on Amazon |
| LUBEGARD Fits: 2.5L L4, 3.5L V6 | 63032 | 🇺🇸 US 🇨🇦 CA | Platinum Universal ATF Protectant32 oz | View on Amazon |
| LUBEGARD Fits: 2.5L L4 ELECTRIC/GAS | 67010 | 🇺🇸 US | Continuously Variable Transmission Recharge & Protect10 oz | View on Amazon |
| LUBEGARD Fits: 2.5L L4 ELECTRIC/GAS | 61904 | 🇺🇸 US | Highly Friction Modified ATF Supplement5 Gallon | View on Amazon |
| LUBEGARD Fits: 2.5L L4 ELECTRIC/GAS | 61955 | 🇺🇸 US | Highly Friction Modified ATF Supplement55 Gallon | View on Amazon |
This table covers the conditioners and additives used with this transmission fluid.
LUBEGARD supplies the 10 Transmission Fluid Additive parts for the 2021 Toyota Avalon. LUBEGARD 19610 carries the "Popular" badge. 1 part fits every engine; the other 9 are engine-specific.
Transmission Mount
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SKP Fits: 2.5L L4 | SK10145 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ANCHOR Fits: 2.5L L4 | 10145 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
| DEA / MARMON RIDE CONTROL Fits: 2.5L L4 | A42098 | 🇺🇸 US 🇨🇦 CA | FrontAWD | View on Amazon |
| PIONEER Fits: 2.5L L4 | 620145 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ANCHOR Fits: 2.5L L4 ELECTRIC/GAS | 10144 | 🇺🇸 US | LeftReuse OE Bracket | View on Amazon |
| ANCHOR Fits: 3.5L V6 | 10146 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
| DEA / MARMON RIDE CONTROL Fits: 2.5L L4 ELECTRIC/GAS | A42127 | 🇺🇸 US | Left | View on Amazon |
| DEA / MARMON RIDE CONTROL Fits: 3.5L V6 | A42128 | 🇺🇸 US 🇨🇦 CA | Left | View on Amazon |
| PIONEER Fits: 2.5L L4 ELECTRIC/GAS | 620144 | 🇺🇸 US | View on Amazon | |
| PIONEER Fits: 3.5L V6 | 620146 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WESTAR Fits: 2.5L L4 ELECTRIC/GAS | EM7503 | 🇺🇸 US | View on Amazon | |
| WESTAR Fits: 3.5L V6 | EM7498 | 🇺🇸 US 🇨🇦 CA | View on Amazon |
This table covers the mounts that hold the transmission to the chassis. Typical signs include a clunk on takeoff, a vibration at idle, or a separated rubber insert. Support the powertrain before unbolting a mount, and torque the fasteners in the notes.
12 Transmission Mount parts for the 2021 Toyota Avalon come from 5 brands — ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 2 other brands.
The Economy section: 1 option from SKP. SKP SK10145 is listed in this group.
Standard Replacement: 3 parts, from ANCHOR, DEA / MARMON RIDE CONTROL and PIONEER. A representative part number is ANCHOR 10145.
8 further parts sit outside the graded sections, with the same engine-level match.
Buying Automatic Transmission Parts for a 2021 Toyota Avalon
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Match the engine first. Some automatic transmission 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Transmission Fluid and Transmission Mount .
Frequently Asked Questions
How many automatic transmission parts fit the 2021 Toyota Avalon?
Our catalog currently lists 58 automatic transmission parts for the 2021 Toyota Avalon across 11 subcategories and 20 brands, covering all 3 engine options (2.5L L4, 2.5L L4 ELECTRIC/GAS and 3.5L V6). Each part is matched to the engine(s) it fits.
Do automatic transmission parts differ between 2021 Toyota Avalon engines?
Some do. 15 parts fit every engine; the other 43 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 automatic transmission problems on a 2021 Toyota Avalon?
Common symptoms include delayed or harsh engagement, slipping under load, fluid that smells burnt, or shuddering at light throttle around 40 mph. 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 filter and pan gasket with every fluid service, and flush the cooler lines when replacing a failed unit.
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 2021 Toyota Avalon 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 2021 Toyota Avalon?
First match the engine — each row shows which engine(s) the part fits. Then use exactly the fluid specification in the notes — automatic transmissions are the least forgiving component on the vehicle about fluid choice. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Toyota Avalon
Automatic Transmission Parts for Other Toyota Avalon Years
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