The 2021 Toyota Prius has 15 automatic transmission parts with verified fitment on this page — 4 part types and 9 brands, covering the 1.8L L4 ELECTRIC/GAS engine. Each part includes a manufacturer part number and application notes.
On the 2021 Toyota Prius, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts. 14 parts of the 15 listed are Transmission Fluid (6 parts), Transmission Fluid Additive (4 parts) and Transmission Mount (4 parts). The other 1 part type covers the remaining 1 part.
The 2021 Toyota Prius came with a single engine, the 1.8L L4 ELECTRIC/GAS, and every part is verified against it.
9 brands supply automatic transmission parts for the 2021 Toyota Prius, led by LUBEGARD (5 parts), PENTOSIN (2 parts) and IDEMITSU (2 parts), plus 6 more brands. Quality grades include World Standard, CVT and Multi-Vehicle.
A "Popular" badge means the source catalog flagged the part as frequently chosen for the 2021 Toyota Prius. 2 parts have it, including MOBIL 126505 (Transmission Fluid) and IDEMITSU 30040096953 (Transmission Fluid). Each part number opens a page with every vehicle that part fits.
Drain Plug Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 652531CD | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 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.
Transmission Fluid
ATF 64
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| PENTOSIN | 1058113 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 1 LiterATF64 or ATF44 | View on Amazon |
| PENTOSIN | 1058215 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 5 LitersATF64 or ATF44 | View on Amazon |
CVT
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD | 68112 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Complete CVT Fluid32 oz | View on Amazon |
Multi-Vehicle
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOBIL Popular | 126505 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Multi-Vehicle ATF | View on Amazon |
World Standard (WS)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| IDEMITSU Popular | 30040096953 | 🇺🇸 US | ATF Type TLS-LV5 Quart | View on Amazon |
| IDEMITSU | 30040096750 | 🇺🇸 US | ATF Type TLS-LV1 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.
6 Transmission Fluid parts are listed for the 2021 Toyota Prius, from PENTOSIN, IDEMITSU, LUBEGARD and 1 other brand. MOBIL 126505 carries the "Popular" badge.
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 Multi-Vehicle grade, MOBIL supplies 1 part: 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 30040096953.
This group includes MOBIL 126505, PENTOSIN 1058113 and PENTOSIN 1058215 and the remaining parts above.
Transmission Fluid Additive
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| LUBEGARD | 61910 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | 10 ozHighly Friction Modified ATF Supplement | View on Amazon |
| LUBEGARD | 67010 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Continuously Variable Transmission Recharge & Protect10 oz | View on Amazon |
| LUBEGARD | 61904 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Highly Friction Modified ATF Supplement5 Gallon | View on Amazon |
| LUBEGARD | 61955 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Highly Friction Modified ATF Supplement55 Gallon | View on Amazon |
This table covers the conditioners and additives used with this transmission fluid.
LUBEGARD supplies the 4 Transmission Fluid Additive parts for the 2021 Toyota Prius.
Listed part numbers: LUBEGARD 61910, LUBEGARD 67010 and LUBEGARD 61904, plus the other parts above.
Transmission Mount
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ANCHOR | 10178 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Left | View on Amazon |
| DEA / MARMON RIDE CONTROL | A42134 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Left | View on Amazon |
| PIONEER | 620178 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | View on Amazon | |
| WESTAR | EM7619 | 🇺🇸 US 🇨🇦 CA 🇲🇽 MX | Prius Base Model | 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.
4 Transmission Mount parts for the 2021 Toyota Prius come from 4 brands — ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 1 other brand.
Part numbers include ANCHOR 10178, DEA / MARMON RIDE CONTROL A42134 and PIONEER 620178, among others listed above.
Buying Automatic Transmission Parts for a 2021 Toyota Prius
On this vehicle, the automatic transmission covers the automatic gearbox and its supporting cast — filters, coolers, solenoids, mounts and torque-converter parts.
- Confirm you have the 1.8L L4 ELECTRIC/GAS engine — every part on this page is matched to it.
- 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 Fluid Additive .
Frequently Asked Questions
How many automatic transmission parts fit the 2021 Toyota Prius?
Our catalog currently lists 15 automatic transmission parts for the 2021 Toyota Prius across 4 subcategories and 9 brands, covering the 1.8L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of automatic transmission problems on a 2021 Toyota Prius?
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 Prius 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 Prius?
Every part on this page is matched to the 1.8L L4 ELECTRIC/GAS engine. 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 Prius
Automatic Transmission Parts for Other Toyota Prius Years
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