2021 Toyota Avalon Engine Parts

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

3 Connecting Rod Bearing parts are listed for the 2021 Toyota Avalon, from TOPLINE and ENGINETECH.

Part numbers include ENGINETECH BB1035, TOPLINE RBTO59 and TOPLINE RBTO49.

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

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

Listed part numbers: AJUSA 54307700, AJUSA 54318100 and ELRING 106910, plus the other parts above.

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

4 Crankshaft Main Bearing parts for the 2021 Toyota Avalon come from TOPLINE.

Listed part numbers: TOPLINE TWTO59, TOPLINE MBTO59 and TOPLINE MBTO49, plus the other parts above.

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

12 Crankshaft Seal parts for the 2021 Toyota Avalon come from 5 brands — VICTOR REINZ, AJUSA, ELRING and 2 other brands. The "Popular" part is SKF 36005.

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

6 Cylinder Head Bolt parts are listed for the 2021 Toyota Avalon, from VICTOR REINZ, TOPLINE and AJUSA.

Listed part numbers: AJUSA 81078800, TOPLINE HBTO59 and TOPLINE HBTO47, 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

14 Cylinder Head Gasket parts are listed for the 2021 Toyota Avalon, from AJUSA, APEX, FEL-PRO and 3 other brands. APEX AHG890L carries the "Popular" badge.

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

7 Cylinder Head Gasket Set parts are listed for the 2021 Toyota Avalon, from AJUSA, MAHLE / CLEVITE, TOPLINE and 1 other brand.

This group includes AJUSA 52570500, AJUSA 52528100 and ELRING 106880 and the remaining parts above.

This table covers the Engine covers. Read more

8 Engine Cover parts are listed for the 2021 Toyota Avalon, from TECHPRO and VARIOUS MFR. TECHPRO TO1228292 carries the "Popular" badge. 3 parts fit every engine; the other 5 are engine-specific.

This group includes TECHPRO TO1228292, TECHPRO TO1228252 and TECHPRO TO1228239 and the remaining parts above.

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

5 Engine Kit Gasket Set parts are listed for the 2021 Toyota Avalon, from AJUSA, TOPLINE and ELRING.

Part numbers include AJUSA 50522800, AJUSA 50542400 and ELRING 085130, 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

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

This group includes MELLING V5831, MELLING V3087 and SBI 13087 and the remaining parts above.

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

7 Harmonic Balancer parts are listed for the 2021 Toyota Avalon, from ATP, PIONEER and ACKOJA.

Listed part numbers: ACKOJA A700993, ATP 102180 and ATP 102224, plus the other parts above.

This table covers the Intake manifolds. Typical signs include an exhaust tick, a vacuum leak, or a gasket that has burned through. Replace the gaskets and hardware; a warped flange will leak with a new gasket alone. Read more

This group shows a single part: ACKOJA A700257.

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

10 Intake Manifold Gasket parts are listed for the 2021 Toyota Avalon, from MAHLE / CLEVITE, AJUSA, ELRING and 3 other brands. MAHLE / CLEVITE MS20603 carries the "Popular" badge.

This table covers the gaskets that seal the Intake Plenum. 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 Plenum Gasket parts for the 2021 Toyota Avalon come from 2 brands — AJUSA and MAHLE / CLEVITE.

This group includes AJUSA 01645000 and MAHLE / CLEVITE MS20627.

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

7 Intake Valve parts for the 2021 Toyota Avalon come from 4 brands — MELLING, QUALCAST, TOPLINE and 1 other brand.

Part numbers include MELLING V5832, MELLING V3086 and QUALCAST 1030532, among others listed 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

31 Motor Mount parts for the 2021 Toyota Avalon come from 5 brands — ANCHOR, PIONEER, DEA / MARMON RIDE CONTROL and 2 other brands. The "Popular" part is ANCHOR 10134. Economy and Standard Replacement are all represented, and Standard Replacement alone accounts for 18 parts.

This table covers the Motor Mount kits. Read more

5 Motor Mount Kit parts for the 2021 Toyota Avalon come from 2 brands — ANCHOR and SKP.

Part numbers include ANCHOR 300919, ANCHOR 300918 and ANCHOR 300833, among others listed above.

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

43 Oil parts for the 2021 Toyota Avalon come from 6 brands — VALVOLINE, LIQUI MOLY, MOBIL and 3 other brands. The "Popular" part is LIQUI MOLY 20328. Full Synthetic, High Mileage (>75,000 Miles) and Racing are all represented, and Full Synthetic alone accounts for 34 parts.

This table covers the heat exchangers that cool engine oil. Typical signs include oil at the cooler fittings, or coolant that looks like a milkshake. Pressure-test both circuits after a cooler swap — a leak here mixes oil and coolant. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS OCK108.

This table covers the seals at the Oil Cooler. 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 918130.

This table covers the seals at the Oil Dipstick / Tube. 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 — BECK/ARNLEY 0396661.

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

5 Oil Drain Plug parts for the 2021 Toyota Avalon come from 4 brands — ELRING, DORMAN, BECK/ARNLEY and 1 other brand. The "Popular" part is DORMAN 090049. 3 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: DORMAN 090049, BECK/ARNLEY 0160116 and ELRING 587290, plus the other 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

7 Oil Drain Plug Gasket parts are listed for the 2021 Toyota Avalon, from DORMAN, AJUSA, APEX and 4 other brands. DORMAN 095156 carries the "Popular" badge. 3 parts fit every engine; the other 4 are engine-specific.

Part numbers include DORMAN 095156, AJUSA 22005800 and APEX ADP1902, among others listed above.

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

3 Oil Filler Cap parts for the 2021 Toyota Avalon come from 3 brands — CALORSTAT, GATES and MOTORAD. Every part fits all 3 engine options (2.5L L4, 2.5L L4 ELECTRIC/GAS and 3.5L V6).

Listed part numbers: CALORSTAT OC2312, GATES 31285 and MOTORAD MO155.

This table covers the gaskets that seal the Oil Filler Cap. 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

One part is listed for the 2021 Toyota Avalon — AJUSA 00519100.

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

38 Oil Filter parts for the 2021 Toyota Avalon come from 17 brands — VARIOUS MFR, WIX, PRO-TEC and 14 other brands. The "Popular" part is PRO-TEC PXL57047. Grades run from Economy through Standard Replacement; Standard Replacement is the most populated section, led by WIX, ACDELCO, BECK/ARNLEY and 8 other brands.

This table covers the Oil Filter covers. Read more

6 Oil Filter Cover parts are listed for the 2021 Toyota Avalon, from MOTORAD, DORMAN, SKP and 2 other brands. DORMAN 917016 carries the "Popular" badge. 1 part fits every engine; the other 5 are engine-specific.

Listed part numbers: DORMAN 917016, SKP SK917016 and AUTOTECNICA TY1420831, plus the other parts above.

This table covers the Oil Level sensors. Typical signs include a warning lamp, a stored code, or a reading that drops out when the harness is wiggled. Inspect the connector and ground before replacing the sensor — wiring faults are often condemned as bad sensors. Read more

3 Oil Level Sensor parts for the 2021 Toyota Avalon come from 2 brands — STANDARD MOTOR PRODUCTS and VEMO.

Listed part numbers: STANDARD MOTOR PRODUCTS FLS359, STANDARD MOTOR PRODUCTS FLS360 and VEMO V70720463.

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

6 Oil Pan parts are listed for the 2021 Toyota Avalon, from ACKOJA, DORMAN, SKP and 1 other brand.

Listed part numbers: ACKOJA A700990, ACKOJA A700991 and DORMAN 266004, plus the other parts 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

2 Oil Pan Gasket parts for the 2021 Toyota Avalon come from 2 brands — AUTOTECNICA and VICTOR REINZ. 1 part fits every engine; the other 1 is engine-specific.

This group includes AUTOTECNICA TY1415891 and VICTOR REINZ 703141410.

This table covers the Oil pumps. Typical signs include noise from the pump, no pressure, or fluid that never arrives at the outlet. Prime or fill the pump as the notes require. A dry start is a common way to kill a new unit. Read more

2 Oil Pump parts for the 2021 Toyota Avalon come from 2 brands — MELLING and TOPLINE.

This group includes MELLING M581 and TOPLINE OPTO59.

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

12 Oil Pump Chain parts are listed for the 2021 Toyota Avalon, from S.A. GEAR, MELLING, CLOYES and 3 other brands. MELLING 1084 carries the "Popular" badge.

In the Kit grade, INA supplies 1 part: grouped under the catalog's "Kit" designation — the notes column spells out what sets them apart. A representative part number is INA ZC0158.

The Standard Replacement section lists 5 options from S.A. GEAR, MELLING, CLOYES and 1 other brand — built to original-equipment specification. MELLING 1084 is listed in this group.

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

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

4 Oil Pump Chain Tensioner parts for the 2021 Toyota Avalon come from 4 brands — CLOYES, MELLING, PREFERRED COMPONENTS INC and 1 other brand.

Listed part numbers: CLOYES 96157, MELLING BT7064 and PREFERRED COMPONENTS INC T66361, plus the other parts above.

This table covers the Oil Pump Control Valve solenoids. Typical signs include a harsh or missing shift, or a code for this solenoid circuit. Check resistance and the connector before dropping the pan for a solenoid. Read more

One part is listed for the 2021 Toyota Avalon — GATES VVS398.

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

4 Oil Pump Sprocket parts are listed for the 2021 Toyota Avalon, from CLOYES, MELLING, PREFERRED COMPONENTS INC and 1 other brand.

This group includes CLOYES S1184, MELLING S1325 and PREFERRED COMPONENTS INC G57020 and the remaining parts above.