2021 Infiniti Q50 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 RBD41HR.

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

2 Conversion / Lower Gasket Set parts for the 2021 Infiniti Q50 come from AJUSA.

Listed part numbers: AJUSA 54338800 and AJUSA 54212000.

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 are listed for the 2021 Infiniti Q50, from KING ENGINE BEARINGS and TOPLINE. 3 parts fit every engine; the other 1 is engine-specific.

In the High Performance grade, KING ENGINE BEARINGS supplies 2 parts: engineered beyond original-equipment specification. A representative part number is KING ENGINE BEARINGS MB4524XPC.

The Standard Replacement section lists 2 options from KING ENGINE BEARINGS and TOPLINE — built to original-equipment specification. KING ENGINE BEARINGS MB4524SI is listed in this group.

Listed part numbers: KING ENGINE BEARINGS MB4524XPC, KING ENGINE BEARINGS MB4524XPCX and KING ENGINE BEARINGS MB4524SI, 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

5 Crankshaft Seal parts are listed for the 2021 Infiniti Q50, from AJUSA, FEL-PRO, JAPANESE OE and 1 other brand. FEL-PRO BS40694 carries the "Popular" badge. 2 parts fit every engine; the other 3 are engine-specific.

Part numbers include FEL-PRO BS40694, AJUSA 15060100 and AJUSA 15092900, among others listed above.

This table covers the Crankshaft Thrust washers. Read more

2 Crankshaft Thrust Washer parts for the 2021 Infiniti Q50 come from 2 brands — KING ENGINE BEARINGS and TOPLINE. 1 part fits every engine; the other 1 is engine-specific.

This group includes KING ENGINE BEARINGS TW1042AM and TOPLINE TWD41HR.

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

3 Cylinder Head Bolt parts for the 2021 Infiniti Q50 come from 2 brands — AJUSA and TOPLINE.

Part numbers include AJUSA 81086100, AJUSA 81062500 and TOPLINE HBD34.

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

8 Cylinder Head Gasket parts for the 2021 Infiniti Q50 come from AJUSA.

Listed part numbers: AJUSA 10275500, AJUSA 10275600 and AJUSA 52654300, 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

2 Cylinder Head Gasket Set parts for the 2021 Infiniti Q50 come from AJUSA.

This group includes AJUSA 52654200 and AJUSA 52407700.

This table covers the Engine covers. Read more

5 Engine Cover parts for the 2021 Infiniti Q50 come from 2 brands — VARIOUS MFR and TECHPRO. The "Popular" part is TECHPRO IN1228131. 2 parts fit every engine; the other 3 are engine-specific.

This group includes TECHPRO IN1228131, TECHPRO IN1228132 and VARIOUS MFR IN1228130 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

2 Engine Kit Gasket Set parts for the 2021 Infiniti Q50 come from AJUSA.

This group includes AJUSA 50582800 and AJUSA 50369700.

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

3 Intake Manifold Gasket parts for the 2021 Infiniti Q50 come from AJUSA.

Part numbers include AJUSA 13347100, AJUSA 13347200 and AJUSA 13241200.

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

10 Motor Mount parts are listed for the 2021 Infiniti Q50, from PIONEER, DEA / MARMON RIDE CONTROL, ANCHOR and 2 other brands. SKP SKM9774 carries the "Popular" badge.

In the Economy grade, SKP supplies 1 part: the catalog's value-priced group. A representative part number is SKP SKM9774.

The Standard Replacement section: 8 options from DEA / MARMON RIDE CONTROL, ANCHOR, PIONEER and 1 other brand. DEA / MARMON RIDE CONTROL A4370 is listed in this group.

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

This table covers the Motor Mount kits. Read more

One part is listed for the 2021 Infiniti Q50 — ANCHOR 301058.

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

33 Oil parts are listed for the 2021 Infiniti Q50, from VALVOLINE, LIQUI MOLY, MOBIL and 3 other brands. LIQUI MOLY 2208 carries the "Popular" badge. They are grouped as Full Synthetic and High Mileage (>75,000 Miles), with Full Synthetic the largest group at 27 parts from LIQUI MOLY, VALVOLINE, MOBIL and 3 other brands.

This table covers the Oil Cooler 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

SUNSONG supplies the 4 Oil Cooler Line parts for the 2021 Infiniti Q50. 1 part fits every engine; the other 3 are engine-specific.

This group includes SUNSONG 5801908, SUNSONG 5801894 and SUNSONG 5801904 and the remaining parts above.

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

5 Oil Drain Plug parts are listed for the 2021 Infiniti Q50, from DORMAN, BECK/ARNLEY, ENGINETECH and 1 other brand. 3 parts fit every engine; the other 2 are engine-specific.

This group includes BECK/ARNLEY 0160116, DORMAN 090038 and DORMAN 090049 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

4 Oil Drain Plug Gasket parts for the 2021 Infiniti Q50 come from 3 brands — DORMAN, AJUSA and FEL-PRO. 2 parts fit every engine; the other 2 are engine-specific.

This group includes AJUSA 01140600, DORMAN 097134 and DORMAN 997134CD and the remaining parts above.

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

3 Oil Filler Cap parts are listed for the 2021 Infiniti Q50, from GATES, MOTORAD and SKP.

Listed part numbers: GATES 31115, MOTORAD MO107 and SKP SKMO107.

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

16 Oil Filter parts are listed for the 2021 Infiniti Q50, from VARIOUS MFR, BOSCH, WIX and 9 other brands. MOBIL M1108A carries the "Popular" badge. 2 parts fit every engine; the other 14 are engine-specific.

Economy: 6 parts, from VARIOUS MFR, BOSCH, FRAM and 2 other brands. A representative part number is BOSCH 72230WS.

In the High Performance / Heavy Duty grade, MOBIL and WIX supply 2 parts: 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 M1108A.

The Standard Replacement section: 8 options from BOSCH, WIX, BECK/ARNLEY and 5 other brands. BOSCH 3300 is listed in this group.

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

3 Oil Pan parts for the 2021 Infiniti Q50 come from SPECTRA PREMIUM.

This group includes SPECTRA PREMIUM NSP49A, SPECTRA PREMIUM NSP48A and SPECTRA PREMIUM NSP31A.

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 are listed for the 2021 Infiniti Q50, from AJUSA and VICTOR REINZ.

Part numbers include AJUSA 14123000 and VICTOR REINZ 703141410.

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

One part is listed for the 2021 Infiniti Q50 — SKF 18857.

This table covers the turbochargers that compress intake air. Read more

6 Turbocharger parts are listed for the 2021 Infiniti Q50, from GPD and ROTOMASTER. GPD 2511596 carries the "Popular" badge.

Listed part numbers: GPD 2511596, GPD 2511605 and GPD 2511589, 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 JTC12789.

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

4 Turbocharger Oil Line parts are listed for the 2021 Infiniti Q50, from AJUSA and GATES.

Part numbers include AJUSA OP11415, AJUSA OP11465 and GATES TL285, among others listed above.

This table covers the Valve covers. Read more

2 Valve Cover parts for the 2021 Infiniti Q50 come from DORMAN.

Listed part numbers: DORMAN 264780 and DORMAN 264779.

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

AJUSA supplies the 4 Valve Cover Gasket parts for the 2021 Infiniti Q50.

Listed part numbers: AJUSA 11181700, AJUSA 11181800 and AJUSA 56041300, plus the other parts above.

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

3 Valve Spring Retainer Keeper parts for the 2021 Infiniti Q50 come from 3 brands — MELLING, QUALCAST and SBI.

Listed part numbers: MELLING VL730, QUALCAST 345012 and SBI 1211064.

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

5 Valve Stem Seal parts are listed for the 2021 Infiniti Q50, from AJUSA and FEL-PRO.

Part numbers include AJUSA 12009100, AJUSA 57097900 and AJUSA 12012100, among others listed 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

9 Variable Valve Timing (VVT) Solenoid / Actuator parts are listed for the 2021 Infiniti Q50, from HOLSTEIN, GATES, ACKOJA and 5 other brands. ACKOJA A380327 carries the "Popular" badge.

Economy: 3 parts, from HOLSTEIN and GATES. A representative part number is GATES VVS247.

The Standard Replacement section: 6 options from ACKOJA, ASTEMO / HITACHI, BECK/ARNLEY and 3 other brands. ACKOJA A380327 is listed in this group.

This group includes ACKOJA A380327, GATES VVS247 and HOLSTEIN 2VTS0279 and the remaining parts above.