2023 Audi A4 Engine Parts

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 Audi A4 come from 3 brands — AJUSA, ENGINETECH and VICTOR REINZ.

Part numbers include AJUSA 54262400, AJUSA 54295400 and ENGINETECH AU20CSA, among others listed 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 2023 Audi A4, from VICTOR REINZ, FEL-PRO, MAHLE / CLEVITE and 1 other brand. FEL-PRO BS40725 carries the "Popular" badge.

This group includes FEL-PRO BS40725, MAHLE / CLEVITE 67969 and VAICO V103682 and the remaining parts above.

This table covers the Crankshaft Seal covers. Read more

This group shows a single part: DORMAN 635696.

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

2 Cylinder Head Bolt parts for the 2023 Audi A4 come from 2 brands — AJUSA and VICTOR REINZ.

Part numbers include AJUSA 81077400 and VICTOR REINZ 141966401.

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 Audi A4 come from 3 brands — AJUSA, VICTOR REINZ and FEL-PRO. The "Popular" part is AJUSA 10202800.

Listed part numbers: AJUSA 10202800, AJUSA 10269100 and AJUSA 10269200, 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

5 Cylinder Head Gasket Set parts for the 2023 Audi A4 come from 2 brands — AJUSA and VICTOR REINZ.

This group includes AJUSA 52550400, AJUSA 52626200 and AJUSA 52626400 and the remaining parts above.

This table covers the Engine covers. Read more

2 Engine Cover parts for the 2023 Audi A4 come from TECHPRO.

This group includes TECHPRO AU1228145 and TECHPRO AU1228141.

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

3 Engine Kit Gasket Set parts for the 2023 Audi A4 come from AJUSA.

Listed part numbers: AJUSA 50504300, AJUSA 50558000 and AJUSA 50559100.

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

This group shows a single part: ASTEMO / HITACHI HCF3057.

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

6 Intake Manifold Gasket parts for the 2023 Audi A4 come from 4 brands — VICTOR REINZ, AJUSA, FEL-PRO and 1 other brand. The "Popular" part is FEL-PRO MS97518.

Part numbers include FEL-PRO MS97518, VICTOR REINZ 714278600 and AJUSA 13245500, 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

2 Motor Mount parts are listed for the 2023 Audi A4, from REIN and VAICO.

Listed part numbers: REIN AVE0769 and VAICO V109175.

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

16 Oil parts are listed for the 2023 Audi A4, from PENTOSIN, LIQUI MOLY, VAICO and 2 other brands. LIQUI MOLY 20238 carries the "Popular" badge.

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

One part is listed for the 2023 Audi A4 — NISSENS 91607.

This table covers the gaskets that seal the Oil Cooler. 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: FEL-PRO 73305.

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

3 Oil Drain Plug parts are listed for the 2023 Audi A4, from DORMAN, REIN and ÜRO PARTS.

Listed part numbers: DORMAN 090090, REIN HWP0043 and ÜRO PARTS 06L103801PRM.

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

14 Oil Filter parts are listed for the 2023 Audi A4, from WIX, CHAMP / LUBER-FINER, FRAM and 10 other brands. HENGST E358H03D246 carries the "Popular" badge.

In the Economy grade, CHAMP / LUBER-FINER, FRAM, FVP and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is CHAMP / LUBER-FINER P1078.

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 M1C258A.

The Standard Replacement section lists 8 options from HENGST, MANN, WIX and 5 other brands — built to original-equipment specification. HENGST E358H03D246 is listed in this group.

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 for the 2023 Audi A4 come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

Part numbers include FEL-PRO 76367 and MAHLE / CLEVITE B33479.

This table covers the Oil Filter covers. Read more

3 Oil Filter Cover parts for the 2023 Audi A4 come from 3 brands — DORMAN, MOTORAD and ÜRO PARTS.

Part numbers include DORMAN 921169, MOTORAD MO319 and ÜRO PARTS 06L115401LPRM.

This table covers the Oil Level Sensor 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

One part is listed for the 2023 Audi A4 — AJUSA 01899000.

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

3 Oil Pan parts for the 2023 Audi A4 come from 3 brands — DORMAN, REIN and SPECTRA PREMIUM.

Part numbers include DORMAN 264553, REIN ESK0240 and SPECTRA PREMIUM VWP60A.

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

5 Oil Pan Gasket parts are listed for the 2023 Audi A4, from VICTOR REINZ, AJUSA and ELRING. VICTOR REINZ 703141410 carries the "Popular" badge.

Part numbers include VICTOR REINZ 703141410, AJUSA 16063100 and AJUSA 59016300, among others listed 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

One part is listed for the 2023 Audi A4 — INA ZT0273.

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 Audi A4 come from 2 brands — DORMAN and GATES.

This group includes DORMAN 916880 and GATES VVS263.

This table covers the Timing belts. Typical signs include squeal on cold start, cracked ribs, or glazing. Spin the tensioner and idlers by hand while the belt is off. Read more

This group shows a single part: DAYCO 95352.

This table covers the Timing Belt & component kits. Read more

One part is listed for the 2023 Audi A4 — GMB 34800923.

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 2023 Audi A4 — SKF 17708.

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

2 Torque Strut Mount parts for the 2023 Audi A4 come from ANCHOR.

Part numbers include ANCHOR 10332 and ANCHOR 10333.

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

One part is listed for the 2023 Audi A4 — VNE 7005081.

This table covers the Turbocharger Boost 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

2 Turbocharger Boost Sensor parts for the 2023 Audi A4 come from WELLS.

Part numbers include WELLS 5S13477 and WELLS 5S15121.