2023 Toyota Highlander 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

This group shows a single part: TOPLINE RBTO59.

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

4 Conversion / Lower Gasket Set parts for the 2023 Toyota Highlander come from 3 brands — AJUSA, ELRING and TOPLINE.

Part numbers include AJUSA 54339100, AJUSA 54307700 and ELRING 106910, among others listed 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

TOPLINE supplies both parts for the 2023 Toyota Highlander.

Listed part numbers: TOPLINE TWTO59 and TOPLINE MBTO59.

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

6 Crankshaft Seal parts are listed for the 2023 Toyota Highlander, from AJUSA, ELRING and VICTOR REINZ. AJUSA 15121900 carries the "Popular" badge. All of them fit every engine offered in the 2023 Highlander.

Part numbers include AJUSA 15121900, ELRING 838030 and AJUSA 15092800, among others listed above.

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

4 Cylinder Head Bolt parts for the 2023 Toyota Highlander come from 3 brands — AJUSA, TOPLINE and VICTOR REINZ.

Part numbers include AJUSA 81087500, AJUSA 81078800 and TOPLINE HBTO59, among others listed 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

6 Cylinder Head Gasket parts for the 2023 Toyota Highlander come from 4 brands — AJUSA, ELRING, MAHLE / CLEVITE and 1 other brand.

Listed part numbers: AJUSA 10276100, AJUSA 10251200 and ELRING B09060, plus the other parts above.

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

4 Cylinder Head Gasket Set parts for the 2023 Toyota Highlander come from 3 brands — AJUSA, ELRING and TOPLINE.

Part numbers include AJUSA 52657200, AJUSA 52570500 and ELRING 107070, among others listed above.

This table covers the Engine covers. Read more

4 Engine Cover parts for the 2023 Toyota Highlander come from TECHPRO. 1 part fits every engine; the other 3 are engine-specific.

Part numbers include TECHPRO TO1228271, TECHPRO TO1228286 and TECHPRO TO1228313, among others listed 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

4 Engine Kit Gasket Set parts for the 2023 Toyota Highlander come from 3 brands — AJUSA, ELRING and TOPLINE.

This group includes AJUSA 50583700, AJUSA 50522800 and ELRING 085160 and the remaining parts 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

2 Exhaust Valve parts are listed for the 2023 Toyota Highlander, from MELLING and TOPLINE.

Part numbers include MELLING V5831 and TOPLINE EVTO59.

This table covers the followers that drive a mechanical fuel pump off the camshaft. Read more

This group shows a single part: STANDARD MOTOR PRODUCTS GDF724.

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

2 Harmonic Balancer parts for the 2023 Toyota Highlander come from 2 brands — ATP and PIONEER.

This group includes ATP 102224 and PIONEER DA2224.

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

7 Intake Manifold Gasket parts for the 2023 Toyota Highlander come from 5 brands — AJUSA, ELRING, MAHLE / CLEVITE and 2 other brands. The "Popular" part is MAHLE / CLEVITE MS20603.

This group includes MAHLE / CLEVITE MS20603, AJUSA 13347700 and AJUSA 13316900 and the remaining parts above.

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

2 Intake Valve parts are listed for the 2023 Toyota Highlander, from QUALCAST and TOPLINE.

Part numbers include QUALCAST 1030532 and TOPLINE IVTO59.

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

9 Motor Mount parts are listed for the 2023 Toyota Highlander, from ANCHOR, DEA / MARMON RIDE CONTROL and PIONEER. ANCHOR 10210 carries the "Popular" badge. 2 parts fit every engine; the other 7 are engine-specific.

Listed part numbers: ANCHOR 10210, ANCHOR 10229 and ANCHOR 10379, plus the other parts above.

This table covers the Motor Mount kits. Read more

One part is listed for the 2023 Toyota Highlander — ANCHOR 300978.

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

41 Oil parts are listed for the 2023 Toyota Highlander, from VALVOLINE, LIQUI MOLY, MOBIL and 3 other brands. LIQUI MOLY 22044 carries the "Popular" badge. Full Synthetic and High Mileage (>75,000 Miles) are all represented, and Full Synthetic alone accounts for 25 parts.

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

This group shows a single part: 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

This group shows a single part: BECK/ARNLEY 0396661.

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

6 Oil Drain Plug parts are listed for the 2023 Toyota Highlander, from DORMAN, ELRING, BECK/ARNLEY and 1 other brand. DORMAN 090038 carries the "Popular" badge. 4 parts fit every engine; the other 2 are engine-specific.

Listed part numbers: DORMAN 090038, DORMAN 090049 and BECK/ARNLEY 0160116, 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

3 Oil Drain Plug Gasket parts for the 2023 Toyota Highlander come from 3 brands — AJUSA, DORMAN and ELRING. Every part fits both the 2.4L L4 Turbocharged and the 2.5L L4 ELECTRIC/GAS.

Part numbers include AJUSA 22005800, DORMAN 095156 and ELRING 473500.

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

3 Oil Filler Cap parts are listed for the 2023 Toyota Highlander, from CALORSTAT, GATES and MOTORAD. All of them fit every engine offered in the 2023 Highlander.

Part numbers include CALORSTAT OC2312, GATES 31285 and MOTORAD MO155.

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

17 Oil Filter parts are listed for the 2023 Toyota Highlander, from VARIOUS MFR, BOSCH, FAMOUS BRAND and 11 other brands. VARIOUS MFR PG4476 carries the "Popular" badge. 15 parts fit every engine; the other 2 are engine-specific.

In the Economy grade, VARIOUS MFR, BOSCH, FAMOUS BRAND and 3 other brands supply 7 parts: the catalog's value-priced group. A representative part number is VARIOUS MFR PG4476.

In the High Performance / Heavy Duty grade, MOBIL 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 MOBIL M1103A.

The Standard Replacement section lists 8 options from ACDELCO, BECK/ARNLEY, BOSCH and 5 other brands — built to original-equipment specification. ACDELCO PF1233 is listed in this group.

1 ungrouped part is not assigned to a grade, with the same engine-level match.

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

One part is listed for the 2023 Toyota Highlander — STANDARD MOTOR PRODUCTS FLS359.

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

3 Oil Pan parts for the 2023 Toyota Highlander come from 3 brands — DORMAN, SKP and SPECTRA PREMIUM.

This group includes DORMAN 266004, SKP SK266004 and SPECTRA PREMIUM TOP76A.

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

One part is listed for the 2023 Toyota Highlander — 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

One part is listed for the 2023 Toyota Highlander — TOPLINE OPTO59.

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

7 Oil Pump Chain parts for the 2023 Toyota Highlander come from 5 brands — JAPANESE OE, MELLING, CLOYES and 2 other brands.

This group includes CLOYES C996, JAPANESE OE A05095AM and JAPANESE OE A05079AM 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

3 Oil Pump Chain Tensioner parts are listed for the 2023 Toyota Highlander, from CLOYES, MELLING and PREFERRED COMPONENTS INC. 2 parts fit every engine; the other 1 is engine-specific.

This group includes CLOYES 96157, MELLING BT7064 and PREFERRED COMPONENTS INC T66361.

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

2 Oil Pump Control Valve / Solenoid parts for the 2023 Toyota Highlander come from 2 brands — GATES and STANDARD MOTOR PRODUCTS. 1 part fits every engine; the other 1 is engine-specific.

This group includes GATES VVS398 and STANDARD MOTOR PRODUCTS OPS414.

This table covers the Oil Pump sprockets. Read more

4 Oil Pump Sprocket parts for the 2023 Toyota Highlander come from 4 brands — CLOYES, MELLING, PREFERRED COMPONENTS INC and 1 other brand.

Part numbers include CLOYES S1184, MELLING S1325 and PREFERRED COMPONENTS INC G57020, among others listed above.

This table covers the pistons that travel in each cylinder. Typical signs include knock, blow-by, or a cylinder that will not hold compression. Piston work is a short-block job. Match bore, pin and ring pack in the notes — not the photo. Read more

This group shows a single part: TOPLINE PATO59H.

This table covers the rings that seal each piston to the cylinder wall. Read more

This group shows a single part: TOPLINE RSTO59.

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

7 Timing Chain parts for the 2023 Toyota Highlander come from 5 brands — JAPANESE OE, MELLING, CLOYES and 2 other brands.

Part numbers include CLOYES C995, JAPANESE OE A05094AM and JAPANESE OE A05078AM, among others listed above.

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

10 Timing Chain & Component Kit parts are listed for the 2023 Toyota Highlander, from MELLING, S.A. GEAR, CLOYES and 2 other brands. CLOYES 90995SX carries the "Popular" badge.

Economy: 2 parts, from S.A. GEAR. A representative part number is S.A. GEAR 76492S.

The Standard Replacement section: 2 options from MELLING. MELLING 31109SAX is listed in this group.

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

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

11 Timing Chain Guide / Damper parts for the 2023 Toyota Highlander come from 4 brands — MELLING, CLOYES, PREFERRED COMPONENTS INC and 1 other brand. The "Popular" part is MELLING BT7063.

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

5 Timing Chain Tensioner parts are listed for the 2023 Toyota Highlander, from MELLING, CLOYES, PREFERRED COMPONENTS INC and 1 other brand.

This group includes CLOYES 96154, MELLING BT7089 and MELLING BT7062 and the remaining parts above.

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

8 Timing Crank Sprocket parts are listed for the 2023 Toyota Highlander, from MELLING, CLOYES, PREFERRED COMPONENTS INC and 1 other brand. MELLING S1323 carries the "Popular" badge.

Listed part numbers: MELLING S1323, MELLING S1324 and CLOYES S1187, plus the other parts above.

This table covers the gaskets that seal the Turbocharger. 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

This group shows a single part: AJUSA JTC12790.

This table covers the Turbocharger Oil lines. Typical signs include a wet fitting, a rusted pipe, or a pressure loss in this circuit. Flare or thread the new line the way the notes specify; a kinked replacement will fail early. Read more

One part is listed for the 2023 Toyota Highlander — AJUSA OP11481.

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 are listed for the 2023 Toyota Highlander, from BECK/ARNLEY, AJUSA, ELRING and 2 other brands. BECK/ARNLEY 0362105 carries the "Popular" badge.

Listed part numbers: BECK/ARNLEY 0362105, AJUSA 56097500 and BECK/ARNLEY 0362084, plus the other parts above.

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

TOPLINE supplies both parts for the 2023 Toyota Highlander.

Part numbers include TOPLINE EVGTO59 and TOPLINE IVGTO55.

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

One part is listed for the 2023 Toyota Highlander — AJUSA 85022700.

This table covers the springs that close each intake and exhaust valve. 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

2 Valve Spring parts for the 2023 Toyota Highlander come from QUALCAST.

This group includes QUALCAST 325507 and QUALCAST 325508.

This table covers the Valve Spring retainers. Read more

This group shows a single part: MELLING VSR726.

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

2 Valve Spring Retainer Keeper parts for the 2023 Toyota Highlander come from 2 brands — MELLING and SBI. 1 part fits every engine; the other 1 is engine-specific.

This group includes 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

9 Valve Stem Seal parts are listed for the 2023 Toyota Highlander, from ELRING, AJUSA, SBI and 1 other brand. ELRING 215710 carries the "Popular" badge.

Listed part numbers: ELRING 215710, SBI 1221266 and AJUSA 12027100, 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

One part is listed for the 2023 Toyota Highlander — WELLS 2T1306.

This table covers the cam phaser sprockets used by the variable-valve-timing system. Read more

One part is listed for the 2023 Toyota Highlander — STANDARD MOTOR PRODUCTS VVT747.