2025 Audi A6 Engine Parts

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

2 Crankshaft Seal parts are listed for the 2025 Audi A6, from FEL-PRO and MAHLE / CLEVITE.

Part numbers include FEL-PRO BS40725 and MAHLE / CLEVITE 67969.

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

This group shows a single part: FEL-PRO 26888PT.

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

2 Intake Manifold Gasket parts for the 2025 Audi A6 come from 2 brands — FEL-PRO and MAHLE / CLEVITE.

Part numbers include 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 are listed for the 2025 Audi A6, from ANCHOR, DEA / MARMON RIDE CONTROL and PIONEER. ANCHOR 10215 carries the "Popular" badge.

Listed part numbers: ANCHOR 10215, ANCHOR 10216 and DEA / MARMON RIDE CONTROL A4943, 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

12 Oil parts are listed for the 2025 Audi A6, from PENTOSIN, LIQUI MOLY, MOBIL and 2 other brands. MOBIL 125386 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 2025 Audi A6 — 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

2 Oil Drain Plug parts are listed for the 2025 Audi A6, from DORMAN and REIN.

Part numbers include DORMAN 090090 and REIN HWP0043.

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 2025 Audi A6, 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

This group shows a single part: MAHLE / CLEVITE B33479.

This table covers the Oil Filter covers. Read more

This group shows a single part: MOTORAD MO319.

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 2025 Audi A6 — AJUSA 01899000.

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

2 Oil Pan parts for the 2025 Audi A6 come from 2 brands — REIN and SPECTRA PREMIUM.

Listed part numbers: 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

One part is listed for the 2025 Audi A6 — AJUSA 16063100.

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 2025 Audi A6 — INA ZT0273.

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 2025 Audi A6 — GMB 34800923.

This table covers the gaskets that seal the Timing Cover. 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 A6 — FEL-PRO TCS46291.

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 2025 Audi A6 come from ANCHOR.

Listed part numbers: ANCHOR 10332 and ANCHOR 10333.

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

One part is listed for the 2025 Audi A6 — VEMO V10771023.

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

MAHLE / CLEVITE supplies both parts for the 2025 Audi A6.

Listed part numbers: MAHLE / CLEVITE SS45940A and MAHLE / CLEVITE SS46126.