2021 Toyota Prius Engine Parts

This table covers the seals at each camshaft end. 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

This group shows a single part: ELRING 135140.

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. Read more

One part is listed for the 2021 Toyota Prius — TOPLINE RBTO55.

This table covers lower / conversion gasket sets for oil-pan and related joints. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

3 Conversion / Lower Gasket Set parts are listed for the 2021 Toyota Prius, from AJUSA, ELRING and TOPLINE.

Listed part numbers: AJUSA 54308500, ELRING 775220 and TOPLINE CBSTO55.

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. Read more

2 Crankshaft Main Bearing parts for the 2021 Toyota Prius come from TOPLINE.

Listed part numbers: TOPLINE TWTO39 and TOPLINE MBTO55.

This table covers the front and rear seals that keep oil in at the crankshaft. 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

5 Crankshaft Seal parts for the 2021 Toyota Prius come from 4 brands — AJUSA, ELRING, SKF and 1 other brand. The "Popular" part is AJUSA 15062600.

This group includes AJUSA 15062600, AJUSA 15092600 and ELRING 286230 and the remaining parts above.

This table covers the bolts that clamp the cylinder head to the block. Read more

5 Cylinder Head Bolt parts are listed for the 2021 Toyota Prius, from ENGINETECH, BECK/ARNLEY, ELRING and 2 other brands. ENGINETECH HB298 carries the "Popular" badge.

Listed part numbers: ENGINETECH HB298, BECK/ARNLEY 0161075 and ELRING 590400, plus the other parts above.

This table covers the head gaskets that seal the block to the cylinder head. 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

2 Cylinder Head Gasket parts are listed for the 2021 Toyota Prius, from AJUSA and ELRING.

Part numbers include AJUSA 10258600 and ELRING 298640.

This table covers multi-piece gasket sets for a cylinder-head job. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

3 Cylinder Head Gasket Set parts are listed for the 2021 Toyota Prius, from AJUSA, TOPLINE and VICTOR REINZ.

This group includes AJUSA 52593400, TOPLINE HSTO55 and VICTOR REINZ 021130001.

This table covers the Engine covers. Read more

10 Engine Cover parts are listed for the 2021 Toyota Prius, from TECHPRO and VARIOUS MFR. TECHPRO TO1228246 carries the "Popular" badge.

This table covers full gasket kits covering the joints opened in an engine rebuild. Typical signs include the leaks that sent the engine or gearbox to the bench. Use every gasket the set is meant for that opening — leftover unused pieces usually belong to another configuration. Read more

4 Engine Kit Gasket Set parts are listed for the 2021 Toyota Prius, from AJUSA, ELRING, TOPLINE and 1 other brand.

Part numbers include AJUSA 50542000, ELRING 158920 and TOPLINE CGSTO55, among others listed above.

This table covers the exhaust valves that let combustion gas out of the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

3 Exhaust Valve parts for the 2021 Toyota Prius come from 3 brands — MELLING, SBI and TOPLINE.

This group includes MELLING V3366, SBI 13366 and TOPLINE EVTO55.

This table covers the crankshaft pulleys / harmonic balancers at the front of the engine. Read more

4 Harmonic Balancer parts are listed for the 2021 Toyota Prius, from ATP, DAYCO, PIONEER and 1 other brand.

Part numbers include ATP 102342, DAYCO PB1653N and PIONEER DA7031, among others listed above.

This table covers the gaskets between the intake manifold and the cylinder head. 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

2 Intake Manifold Gasket parts are listed for the 2021 Toyota Prius, from BECK/ARNLEY and ELRING.

Part numbers include BECK/ARNLEY 0376229 and ELRING 298230.

This table covers the intake valves that let air (and fuel, on port-injected engines) into the cylinder. Typical signs include a circuit that will not hold, a whistle, or a code for this valve. A stuck valve is often debris. Clean the ports before installing the new one. Read more

4 Intake Valve parts for the 2021 Toyota Prius come from 4 brands — ENGINETECH, MELLING, SBI and 1 other brand.

This group includes ENGINETECH IM4472, MELLING V3365 and SBI 13365 and the remaining parts above.

This table covers the mounts that hold the engine 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. Read more

7 Motor Mount parts for the 2021 Toyota Prius come from 4 brands — ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 1 other brand. The "Popular" part is ANCHOR 10169.

Part numbers include ANCHOR 10169, ANCHOR 10177 and DEA / MARMON RIDE CONTROL A42129, among others listed above.

This table covers the Motor Mount kits. Read more

This group shows a single part: ANCHOR 300927.

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. Read more

10 Oil parts for the 2021 Toyota Prius come from 4 brands — LIQUI MOLY, IDEMITSU, VALVOLINE and 1 other brand. The "Popular" part is LIQUI MOLY 20328.

The Full Synthetic section lists 9 options from LIQUI MOLY, VALVOLINE, IDEMITSU and 1 other brand — full-synthetic oils. LIQUI MOLY 20328 is listed in this group.

In the High Mileage (>75,000 Miles) grade, IDEMITSU supplies 1 part: oils grouped for high-mileage engines. A representative part number is IDEMITSU 30015121750.

This table covers the drain plugs in the oil pan. Read more

6 Oil Drain Plug parts for the 2021 Toyota Prius come from 4 brands — DORMAN, ELRING, BECK/ARNLEY and 1 other brand. The "Popular" part is DORMAN 090038.

This group includes DORMAN 090038, DORMAN 090049 and BECK/ARNLEY 0160116 and the remaining parts above.

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. Read more

6 Oil Drain Plug Gasket parts are listed for the 2021 Toyota Prius, from DORMAN, ULTRA-POWER, APEX and 3 other brands. DORMAN 095156 carries the "Popular" badge.

This group includes DORMAN 095156 and APEX ADP1902 and the remaining parts above.

This table covers the caps on the oil filler neck. Read more

This group shows a single part: MOTORAD MO224.

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. Read more

21 Oil Filter parts for the 2021 Toyota Prius come from 15 brands — VARIOUS MFR, BOSCH, CHAMP / LUBER-FINER and 12 other brands. The "Popular" part is PRO-TEC PXL51394.

The Economy section lists 7 options from VARIOUS MFR, PRO-TEC, BOSCH and 3 other brands — the catalog's value-priced group. PRO-TEC PXL51394 is listed in this group.

The High Performance / Heavy Duty section lists 2 options from MOBIL and WIX — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. MOBIL M1103A is listed in this group.

In the Standard Replacement grade, ACDELCO, WIX, ACKOJA and 8 other brands supply 12 parts: built to original-equipment specification. A representative part number is ACDELCO PF1233.

This table covers the Oil Filter Adapter Gasket O-rings. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

2 Oil Filter Adapter Gasket / O-Ring parts are listed for the 2021 Toyota Prius, from FEL-PRO and MAHLE / CLEVITE.

This group includes FEL-PRO ES71858 and MAHLE / CLEVITE B33713.

This table covers the oil pans that hold the engine's oil sump. Read more

5 Oil Pan parts are listed for the 2021 Toyota Prius, from AUTOTECNICA, DORMAN, REIN and 2 other brands. AUTOTECNICA TY1415247 carries the "Popular" badge.

Part numbers include AUTOTECNICA TY1415247, DORMAN 264324 and REIN ESK0201, among others listed above.

This table covers the gaskets between the oil pan and the block. 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 Oil Pan Gasket parts for the 2021 Toyota Prius come from 3 brands — APEX, FEL-PRO and VICTOR REINZ.

This group includes APEX AOP881, FEL-PRO OS30829 and VICTOR REINZ 703141410.

This table covers the chains that drive the oil pump. Read more

4 Oil Pump Chain parts are listed for the 2021 Toyota Prius, from PREFERRED COMPONENTS INC, INA and MELLING.

The Chain Only section lists 1 option from INA — grouped under the catalog's "Chain Only" designation — the notes column spells out what sets them apart. INA ZCC751 is listed in this group.

Economy: 1 part, from PREFERRED COMPONENTS INC. A representative part number is PREFERRED COMPONENTS INC C1001.

In the Kit grade, PREFERRED COMPONENTS INC supplies 1 part: grouped under the catalog's "Kit" designation — the notes column spells out what sets them apart. A representative part number is PREFERRED COMPONENTS INC TS10000.

The Standard Replacement section: 1 option from MELLING. MELLING 751 is listed in this group.

This group includes INA ZCC751, PREFERRED COMPONENTS INC C1001 and PREFERRED COMPONENTS INC TS10000 and the remaining parts above.

This table covers the Oil Pump Chain tensioners. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

2 Oil Pump Chain Tensioner parts for the 2021 Toyota Prius come from 2 brands — MELLING and PREFERRED COMPONENTS INC.

This group includes MELLING BT5936 and PREFERRED COMPONENTS INC T68005.

This table covers the Oil Pump Drive gears. Read more

One part is listed for the 2021 Toyota Prius — PREFERRED COMPONENTS INC G56125.

This table covers the O-rings that seal the oil-pump pickup tube. Typical signs include a seep at a fitting or a housing that weeps after a service. Lube the new O-ring with the fluid it will see, and do not roll it into the groove. Read more

This group shows a single part: FEL-PRO 73595.

This table covers the Oil Pump sprockets. Read more

One part is listed for the 2021 Toyota Prius — MELLING S923.

This table covers the Piston Pin bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles. Read more

This group shows a single part: TOPLINE PBTO39.

This table covers the Thrust washers. Read more

This group shows a single part: KING ENGINE BEARINGS TW185AM.

This table covers the Timing Cam sprockets. Read more

2 Timing Cam Sprocket parts for the 2021 Toyota Prius come from 2 brands — INA and MELLING.

This group includes INA ZSS846 and MELLING S846.

This table covers the timing chains that keep the cams in time with the crank. Read more

2 Timing Chain parts are listed for the 2021 Toyota Prius, from MELLING and PREFERRED COMPONENTS INC.

Listed part numbers: MELLING 4220 and PREFERRED COMPONENTS INC C15140.

This table covers kits that group a timing chain with the related tensioners and guides. Read more

5 Timing Chain & Component Kit parts for the 2021 Toyota Prius come from 4 brands — PREFERRED COMPONENTS INC, INA, MELLING and 1 other brand. The "Popular" part is PREFERRED COMPONENTS INC TS15140.

The Economy section: 2 options from PREFERRED COMPONENTS INC. PREFERRED COMPONENTS INC TS15140 is listed in this group.

Standard Replacement: 3 parts, from INA, MELLING and TOPLINE. A representative part number is INA ZC76275S.

Listed part numbers: PREFERRED COMPONENTS INC TS15140, PREFERRED COMPONENTS INC TS25140 and INA ZC76275S, plus the other parts above.

This table covers the guides and dampers that keep the timing chain on its path. Read more

6 Timing Chain Guide / Damper parts are listed for the 2021 Toyota Prius, from MELLING and PREFERRED COMPONENTS INC. MELLING BG5940 carries the "Popular" badge.

Part numbers include MELLING BG5940, PREFERRED COMPONENTS INC R70172 and MELLING BG7043, among others listed above.

This table covers the tensioners that keep the timing chain taut. Typical signs include belt flutter, a chirp that returns after a new belt, or an arm that no longer damps. Replace the tensioner with the belt at higher mileage. Read more

2 Timing Chain Tensioner parts for the 2021 Toyota Prius come from 2 brands — MELLING and PREFERRED COMPONENTS INC.

Part numbers include MELLING BT5935 and PREFERRED COMPONENTS INC T66225.

This table covers the Timing Chain Tensioner springs. Typical signs include a sagging corner, a broken coil, or a clunk from the spring pocket. Replace springs in axle pairs and inspect the seats. Read more

One part is listed for the 2021 Toyota Prius — PREFERRED COMPONENTS INC T68004.

This table covers the seals at the Timing Cover. 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

This group shows a single part: SKF 15355A.

This table covers the crankshaft sprockets that drive the timing chain or belt. Read more

2 Timing Crank Sprocket parts for the 2021 Toyota Prius come from PREFERRED COMPONENTS INC.

Part numbers include PREFERRED COMPONENTS INC G56373 and PREFERRED COMPONENTS INC G56033.

This table covers the Torque Strut mounts. 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. Read more

4 Torque Strut Mount parts are listed for the 2021 Toyota Prius, from ANCHOR, DEA / MARMON RIDE CONTROL, PIONEER and 1 other brand.

Part numbers include ANCHOR 10172, DEA / MARMON RIDE CONTROL A42150 and PIONEER 630172, among others listed above.

This table covers the gaskets that seal the valve cover to the cylinder head. 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

6 Valve Cover Gasket parts for the 2021 Toyota Prius come from 5 brands — VICTOR REINZ, BECK/ARNLEY, ELRING and 2 other brands. The "Popular" part is BECK/ARNLEY 0362112.

Part numbers include BECK/ARNLEY 0362112, ELRING 562600 and AJUSA 56086800, among others listed above.

This table covers the Valve Cover grommets. Read more

This group shows a single part: BECK/ARNLEY 0396605.

This table covers the pressed-in bronze and cast-iron guides that align valve stems. Typical signs include oil smoke on startup, a guide that has gone oval, or a valve that no longer seats quietly. Guides are a machine-shop fit. Confirm stem diameter in the notes before ordering. Read more

4 Valve Guide parts for the 2021 Toyota Prius come from 2 brands — SBI and TOPLINE.

This group includes SBI 1403135, SBI 1403134 and TOPLINE EVGTO55 and the remaining parts above.

This table covers the lifters / tappets that transfer cam motion to the valves. Read more

2 Valve Lifter parts for the 2021 Toyota Prius come from 2 brands — AJUSA and TOPLINE.

Listed part numbers: AJUSA 85010900 and TOPLINE LIFTO55P.

This table covers the Valve Spring retainers. Read more

One part is listed for the 2021 Toyota Prius — MELLING VSR726.

This table covers the keepers that lock each valve-spring retainer to the stem. Read more

2 Valve Spring Retainer Keeper parts are listed for the 2021 Toyota Prius, from MELLING and SBI.

Part numbers include MELLING VL1100 and SBI 1211100.

This table covers the seals on each valve stem that control oil into the guides. 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

6 Valve Stem Seal parts for the 2021 Toyota Prius come from 3 brands — ELRING, SBI and TOPLINE. The "Popular" part is ELRING 215710.

Listed part numbers: ELRING 215710, SBI 1221266 and ELRING 170020, plus the other parts above.

This table covers the oil-control solenoids that command the cam phasers. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same. Read more

7 Variable Valve Timing (VVT) Solenoid / Actuator parts for the 2021 Toyota Prius come from 7 brands — GATES, HOLSTEIN, ROSTRA and 4 other brands. The "Popular" part is NTK VV0064.

The Economy section: 4 options from GATES, HOLSTEIN, ROSTRA and 1 other brand. GATES VVS120 is listed in this group.

Standard Replacement: 3 parts, from NTK, STANDARD MOTOR PRODUCTS and BECK/ARNLEY. A representative part number is NTK VV0064.

Listed part numbers: NTK VV0064, GATES VVS120 and HOLSTEIN 2VTS0016, plus the other parts above.