2025 Audi S3 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

One part is listed for the 2025 Audi S3 — AJUSA 54326200.

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

4 Crankshaft Seal parts for the 2025 Audi S3 come from 3 brands — AJUSA, FEL-PRO and MAHLE / CLEVITE.

This group includes AJUSA 15103300, AJUSA 71013900 and FEL-PRO BS40725 and the remaining parts above.

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

One part is listed for the 2025 Audi S3 — AJUSA 81077400.

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

One part is listed for the 2025 Audi S3 — AJUSA 10268400.

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

One part is listed for the 2025 Audi S3 — AJUSA 52626300.

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

One part is listed for the 2025 Audi S3 — AJUSA 50558100.

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 are listed for the 2025 Audi S3, from AJUSA, FEL-PRO and MAHLE / CLEVITE.

Part numbers include AJUSA 13245500, FEL-PRO MS97518 and MAHLE / CLEVITE MS20326.

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

5 Motor Mount parts for the 2025 Audi S3 come from 3 brands — ANCHOR, VAICO and PIONEER. The "Popular" part is ANCHOR 9919.

The Economy section lists 1 option from VAICO — the catalog's value-priced group. VAICO V107841 is listed in this group.

In the Standard Replacement grade, ANCHOR and PIONEER supply 4 parts: built to original-equipment specification. A representative part number is ANCHOR 9919.

Listed part numbers: ANCHOR 9919, VAICO V107841 and ANCHOR 9918, plus the other parts 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

5 Oil parts for the 2025 Audi S3 come from 3 brands — LIQUI MOLY, VALVOLINE and MOBIL. The "Popular" part is MOBIL 124547.

Part numbers include MOBIL 124547, LIQUI MOLY 22156 and LIQUI MOLY 22158, among others listed above.

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: 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

One part is listed for the 2025 Audi S3 — FEL-PRO 73305.

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

3 Oil Drain Plug parts for the 2025 Audi S3 come from 2 brands — REIN and DORMAN.

Part numbers include DORMAN 090090, REIN HWP1014 and REIN HWU1014.

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

One part is listed for the 2025 Audi S3 — AJUSA 18001000.

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 for the 2025 Audi S3 come from 13 brands — WIX, CHAMP / LUBER-FINER, FRAM and 10 other brands. The "Popular" part is HENGST E358H03D246.

The Economy section: 4 options from CHAMP / LUBER-FINER, FRAM, FVP and 1 other brand. CHAMP / LUBER-FINER P1078 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 M1C258A is listed in this group.

Standard Replacement: 8 parts, from HENGST, MANN, WIX and 5 other brands. A representative part number is HENGST E358H03D246.

This table covers the Oil Filter covers. Read more

One part is listed for the 2025 Audi S3 — MOTORAD MO319.

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

One part is listed for the 2025 Audi S3 — VAICO V10000085.

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

One part is listed for the 2025 Audi S3 — DAYCO 95352.

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

This group shows a single part: GMB 34800923.

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

One part is listed for the 2025 Audi S3 — ANCHOR 10363.

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

One part is listed for the 2025 Audi S3 — WELLS 5S13477.

This table covers the Turbocharger Diverter / Bypass valves. 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

This group shows a single part: VEMO V10771023.

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

One part is listed for the 2025 Audi S3 — AJUSA JTC12738.

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

This group shows a single part: AJUSA OP11313.

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

This group shows a single part: AJUSA 85009000.

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

3 Valve Stem Seal parts for the 2025 Audi S3 come from 2 brands — AJUSA and MAHLE / CLEVITE.

Part numbers include AJUSA 12035500, AJUSA 57077600 and MAHLE / CLEVITE SS46126.

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

This group shows a single part: WELLS 2T1269.