The 2021 Toyota Prius C has 21 engine parts with verified fitment on this page — 9 part types and 12 brands, covering the 1.5L L4 ELECTRIC/GAS engine. Each part includes a manufacturer part number and application notes.
The engine on the 2021 Toyota Prius C covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components. The largest groups are Oil Filter (9 parts), Oil (3 parts) and Oil Drain Plug (3 parts). The other 6 part types cover the remaining 6 parts.
Every part on this page is matched to the 1.5L L4 ELECTRIC/GAS — the only engine offered in the 2021 Toyota Prius C.
The most listed brands for 2021 Toyota Prius C engine parts are KING ENGINE BEARINGS (3 parts), VALVOLINE (3 parts) and DORMAN (3 parts), plus 9 more brands. Quality grades include Economy, Standard Replacement and High Performance / Heavy Duty.
2 parts on this 2021 Toyota Prius C page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including WIX 51394XP (Oil Filter) and WIX 51394 (Oil Filter). Click any part number to see every vehicle that part fits.
Connecting Rod Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS | CR4349CP | 🇲🇽 MX | SetTrimetal | View on Amazon |
This table covers the bearings in the connecting-rod big ends. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
This group shows a single part: KING ENGINE BEARINGS CR4349CP.
Crankshaft Main Bearing
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS | MB5394AM | 🇲🇽 MX | SetBimetal (Aluminum Base) | View on Amazon |
This table covers the main bearings that support the crankshaft in the block. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.
One part is listed for the 2021 Toyota Prius C — KING ENGINE BEARINGS MB5394AM.
Oil
Full Synthetic
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | VV935 | 🇲🇽 MX | Advanced Full Synthetic SAE 10W-301 Quart | View on Amazon |
| VALVOLINE | 881165 | 🇲🇽 MX | Advanced Full Synthetic SAE 10W-30Easy Pour 5 Quart | View on Amazon |
High Mileage (>75,000 Miles)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE | 881052 | 🇲🇽 MX | Max Life High Mileage SAE 10W-305 Gallon Bay Box | View on Amazon |
This table covers the engine oils listed by grade and specification for this engine. Typical signs include a low-oil lamp, knocking after a long interval, or oil that has gone thin and black well before the next service. Match the viscosity and spec in the notes (and on the filler cap). The tables group grades — they are not interchangeable.
VALVOLINE supplies the 3 Oil parts for the 2021 Toyota Prius C.
In the Full Synthetic grade, VALVOLINE supplies 2 parts: full-synthetic oils. A representative part number is VALVOLINE VV935.
The High Mileage (>75,000 Miles) section lists 1 option from VALVOLINE — oils grouped for high-mileage engines. VALVOLINE 881052 is listed in this group.
Part numbers include VALVOLINE VV935, VALVOLINE 881165 and VALVOLINE 881052.
Oil Drain Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 090038 | 🇲🇽 MX | StandardM12-1.25 | View on Amazon |
| DORMAN | 090049 | 🇲🇽 MX | Pilot PointM12-1.25 | View on Amazon |
| REIN | HWU0112 | 🇲🇽 MX | View on Amazon |
This table covers the drain plugs in the oil pan.
3 Oil Drain Plug parts are listed for the 2021 Toyota Prius C, from DORMAN and REIN.
Listed part numbers: DORMAN 090038, DORMAN 090049 and REIN HWU0112.
Oil Drain Plug Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN | 095156 | 🇲🇽 MX | View on Amazon |
This table covers the crush washers and gaskets under the oil 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 095156.
Oil Filler Cap
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTORAD | MO155 | 🇲🇽 MX | Material: Plastic, Rubber | View on Amazon |
This table covers the caps on the oil filler neck.
One part is listed for the 2021 Toyota Prius C — MOTORAD MO155.
Oil Filter
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | R1394 | 🇲🇽 MX | Media Material: CelluloseSpin-On Filter | View on Amazon |
| PRO-TEC | PXL51394 | 🇲🇽 MX | Media Material: CelluloseSpin-On Filter | View on Amazon |
| VARIOUS MFR | PG4476 | 🇲🇽 MX | Spin-On | View on Amazon |
| VARIOUS MFR | PO4476TY2 | 🇲🇽 MX | OE StyleSpin-On | View on Amazon |
High Performance / Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Popular | 51394XP | 🇲🇽 MX | XP Extreme DutyBest For Synthetic Motor Oils | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| WIX Popular | 51394 | 🇲🇽 MX | Media Material: CelluloseSpin-On Filter | View on Amazon |
| MAHLE / CLEVITE | OC340 | 🇲🇽 MX | Filter Thread Size: 3/4"-16UNFSpin-On | View on Amazon |
| MANN | W683 | 🇲🇽 MX | Anti-Drain Back Valve: YESBypass Relief Valve Setting: 13 PSI | View on Amazon |
| VARIOUS MFR | PG4476EX | 🇲🇽 MX | Extended LifeSpin-On | View on Amazon |
This table covers the oil filters that screw onto this engine's filter mount. Typical signs include low oil pressure after a service, or a filter that will not spin off because the old gasket stayed on the block. Lube the new gasket and tighten to the spec on the box; a double-gasket install dumps the sump on the first drive.
9 Oil Filter parts are listed for the 2021 Toyota Prius C, from VARIOUS MFR, WIX, FVP and 3 other brands. WIX 51394XP carries the "Popular" badge.
In the Economy grade, VARIOUS MFR, FVP and PRO-TEC supply 4 parts: the catalog's value-priced group. A representative part number is FVP R1394.
In the High Performance / Heavy Duty grade, WIX supplies 1 part: grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. A representative part number is WIX 51394XP.
The Standard Replacement section lists 4 options from WIX, MAHLE / CLEVITE, MANN and 1 other brand — built to original-equipment specification. WIX 51394 is listed in this group.
This group includes WIX 51394XP, FVP R1394 and PRO-TEC PXL51394 and the remaining parts above.
Oil Pan
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SPECTRA PREMIUM | TOP25A | 🇲🇽 MX | LowerGasket and/or Sealant Not Included | View on Amazon |
This table covers the oil pans that hold the engine's oil sump.
This group shows a single part: SPECTRA PREMIUM TOP25A.
Thrust Washer
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| KING ENGINE BEARINGS | TW185AM | 🇲🇽 MX | Bimetal (Aluminum Base) | View on Amazon |
This table covers the Thrust washers.
One part is listed for the 2021 Toyota Prius C — KING ENGINE BEARINGS TW185AM.
Buying Engine Parts for a 2021 Toyota Prius C
On this vehicle, the engine covers the internals and hard parts that build compression and keep oil where it belongs — gaskets, bearings, camshafts, lifters, seals and timing components.
- Confirm you have the 1.5L 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 seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Oil Filter and Oil .
Frequently Asked Questions
How many engine parts fit the 2021 Toyota Prius C?
Our catalog currently lists 21 engine parts for the 2021 Toyota Prius C across 9 subcategories and 12 brands, covering the 1.5L L4 ELECTRIC/GAS engine. Each part is matched to the engine(s) it fits.
What are the signs of engine problems on a 2021 Toyota Prius C?
Common symptoms include oil spots under the vehicle, blue or white exhaust smoke, ticking from the valvetrain, or coolant mysteriously disappearing. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What oil viscosity is listed for the 2021 Toyota Prius C?
Oil rows on this page include SAE 10W-30. Confirm the engine and the weight on the filler cap before you buy — high-mileage and standard fills can differ.
What should I replace at the same time?
Where labor overlaps, replace the seals and gaskets for anything you open up; a timing job should always include the tensioner and guides, not just the belt or chain.
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 C 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 C?
Every part on this page is matched to the 1.5L L4 ELECTRIC/GAS engine. Then engine hard parts are unforgiving of guesswork — confirm the casting or engine code before ordering, because one model year can hide two different blocks. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 2021 Toyota Prius C
Engine Parts for Other Toyota Prius C Years
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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.