2021 Audi A4 Allroad 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

3 Conversion / Lower Gasket Set parts are listed for the 2021 Audi A4 Allroad, from AJUSA, ENGINETECH and VICTOR REINZ.

Part numbers include AJUSA 54295400, ENGINETECH AU20CSA and VICTOR REINZ 081018101.

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 2021 Audi A4 Allroad come from 3 brands — AJUSA, FEL-PRO and MAHLE / CLEVITE.

Part numbers include AJUSA 15103300, AJUSA 71013900 and FEL-PRO BS40725, among others listed above.

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

One part is listed for the 2021 Audi A4 Allroad — 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

3 Cylinder Head Gasket parts are listed for the 2021 Audi A4 Allroad, from AJUSA, FEL-PRO and VICTOR REINZ.

Part numbers include AJUSA 10269200, FEL-PRO 26888PT and VICTOR REINZ 611109300.

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 are listed for the 2021 Audi A4 Allroad, from AJUSA and VICTOR REINZ.

This group includes AJUSA 52626200 and VICTOR REINZ 021109302.

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 2021 Audi A4 Allroad — AJUSA 50558000.

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

One part is listed for the 2021 Audi A4 Allroad — 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

3 Intake Manifold Gasket parts are listed for the 2021 Audi A4 Allroad, from AJUSA, FEL-PRO and MAHLE / CLEVITE.

Listed part numbers: 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

3 Motor Mount parts for the 2021 Audi A4 Allroad come from 2 brands — WESTAR and VAICO.

Part numbers include VAICO V109175, WESTAR EM7478 and WESTAR EM7479.

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 for the 2021 Audi A4 Allroad come from 5 brands — PENTOSIN, LIQUI MOLY, VAICO and 2 other brands. The "Popular" part is LIQUI MOLY 20238.

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

2 Oil Cooler parts for the 2021 Audi A4 Allroad come from 2 brands — DORMAN and NISSENS.

Listed part numbers: DORMAN 918985 and 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

2 Oil Cooler Gasket parts are listed for the 2021 Audi A4 Allroad, from FEL-PRO and MAHLE / CLEVITE.

This group includes FEL-PRO 73305 and MAHLE / CLEVITE B33478.

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

3 Oil Drain Plug parts for the 2021 Audi A4 Allroad come from 3 brands — DORMAN, REIN and ÜRO PARTS.

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

This table covers the Oil Drain Plug Removal tools. This is a service tool, not a wear part — match the application in the notes. Read more

This group shows a single part: DORMAN 090999.

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 for the 2021 Audi A4 Allroad come from 14 brands — VAICO, WIX, CHAMP / LUBER-FINER and 11 other brands. The "Popular" part is WIX WL10396XP.

The Economy section lists 7 options from VAICO, CHAMP / LUBER-FINER, FRAM and 2 other brands — the catalog's value-priced group. CHAMP / LUBER-FINER P1078 is listed in this group.

The High Performance / Heavy Duty section lists 2 options from WIX and MOBIL — grouped under the catalog's "High Performance / Heavy Duty" designation — the notes column spells out what sets them apart. WIX WL10396XP is listed in this group.

In the Standard Replacement grade, HENGST, MANN, WIX and 5 other brands supply 8 parts: built to original-equipment specification. A representative part number is HENGST E358H03D246.

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 are listed for the 2021 Audi A4 Allroad, from 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 are listed for the 2021 Audi A4 Allroad, from DORMAN, MOTORAD and ÜRO PARTS.

Listed part numbers: 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

This group shows a single part: AJUSA 01899000.

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

4 Oil Pan parts are listed for the 2021 Audi A4 Allroad, from DORMAN, REIN, SPECTRA PREMIUM and 1 other brand.

This group includes DORMAN 264553, REIN ESK0240 and SPECTRA PREMIUM VWP60A and the remaining parts above.

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 for the 2021 Audi A4 Allroad come from 3 brands — VICTOR REINZ, AJUSA and ELRING. The "Popular" part is VICTOR REINZ 703141410.

Listed part numbers: VICTOR REINZ 703141410, AJUSA 16063100 and AJUSA 59016300, plus the other parts above.

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

This group shows a single part: VAICO V10000191.

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 are listed for the 2021 Audi A4 Allroad, from DORMAN and GATES.

Part numbers include DORMAN 916880 and GATES VVS263.

This table covers the Oil Temperature senders. Read more

One part is listed for the 2021 Audi A4 Allroad — VEMO V10720210.

This table covers the rocker arms that transfer cam motion to the valves. Read more

This group shows a single part: MELLING MR1349.

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 2021 Audi A4 Allroad — DAYCO 95352.

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

This group shows a single part: 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

This group shows a single part: MAHLE / CLEVITE JV5175.

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

ANCHOR supplies both parts for the 2021 Audi A4 Allroad.

Listed part numbers: ANCHOR 10332 and ANCHOR 10333.

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

This group shows a single part: 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

One part is listed for the 2021 Audi A4 Allroad — WELLS 5S13477.

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 2021 Audi A4 Allroad — 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 OP11334.

This table covers the Turbocharger Wastegate Solenoid actuators. 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: SKP SK145874.

This table covers the Valve covers. Read more

One part is listed for the 2021 Audi A4 Allroad — VAICO V105778.

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

2 Valve Lifter parts for the 2021 Audi A4 Allroad come from 2 brands — AJUSA and MELLING.

Listed part numbers: AJUSA 85009000 and MELLING JB7532.

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

One part is listed for the 2021 Audi A4 Allroad — MELLING VL1098.

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

4 Valve Stem Seal parts for the 2021 Audi A4 Allroad come from 2 brands — AJUSA and MAHLE / CLEVITE.

Listed part numbers: AJUSA 12035500, AJUSA 57077600 and MAHLE / CLEVITE SS45940A, 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

5 Variable Valve Timing (VVT) Solenoid / Actuator parts for the 2021 Audi A4 Allroad come from 4 brands — STANDARD MOTOR PRODUCTS, HOLSTEIN, SPECTRA PREMIUM and 1 other brand. The "Popular" part is STANDARD MOTOR PRODUCTS VVT302.

The Economy section: 3 options from HOLSTEIN, SPECTRA PREMIUM and WELLS. HOLSTEIN 2VTS0191 is listed in this group.

Standard Replacement: 2 parts, from STANDARD MOTOR PRODUCTS. A representative part number is STANDARD MOTOR PRODUCTS VVT302.

This group includes STANDARD MOTOR PRODUCTS VVT302, HOLSTEIN 2VTS0191 and SPECTRA PREMIUM VTS1199 and the remaining parts above.