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The short version
- No Audi A8 wheel bearing number appears anywhere in the catalogs, across D2, D3 or D4.
- The A4 and A6 are documented in depth over the same years. The flagship A8 was simply never picked up.
- D3 and D4 A8s use bolt-on hub units front and rear, with quattro standard on every US car.
- The only reliable path is to order by VIN through a dealer or match the old part directly.
Audi documented the A4 and A6 in detail across two decades of catalogs. The A8, the brand’s own flagship, never made the list.
A genuine gap in the catalogs
D2, D3 and D4 generations are all absent. The smaller A4 and A6, built the same years, are documented in depth.
Both ends use bolt-on hub units on D3 and D4 cars. Quattro all-wheel drive is standard across the US lineup.
Audi A8 wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 2010 to 2018 (D4) | Front and rear | own listings, match by VIN |
| 2004 to 2009 (D3) | Front and rear | own listings, match by VIN |
| 1997 to 2003 (D2) | Front and rear | own listings, match by VIN |
No model year on this chart resolves to a catalog number. On this chart a 1997 through 2018 Audi A8 is not documented, so those cars go by the old part or the VIN.
Lookups run through the cross reference page.
Marketplace listings sometimes borrow A6 part numbers for A8 searches, since the two share a badge family.
The A8’s heavier aluminum platform carries its own hardware. An A6 number is not a safe substitute without VIN confirmation.
Aluminum body, standalone hardware
Audi built the A8 on its own aluminum space frame, a construction the A4 and A6 never shared. That difference is likely why the flagship’s hub hardware sits outside the catalogs covering the rest of the lineup.
For context, the A6 page carries documented numbers, while the A7 page works through its own catalog gap. Neither substitutes for an A8 part.
A flagship built for VIN-based ordering
Every A8 sold in the US came standard with quattro. The bolt-on hub design on D3 and D4 cars means a shop is ordering a full assembly, not repacking a bearing. That assembly still has to be sourced against the VIN rather than a catalog row.
The earlier D2 generation faces the same catalog gap. The design specifics documented here stop at the D3 bolt-on hubs. The safest path is the same regardless of generation: order by VIN or match the old part.
Diagnosing an Audi A8 wheel bearing
- Pull the VIN before contacting a dealer, since no catalog row exists to search by year alone.
- Confirm the generation, D2, D3 or D4, to rule out an A6 substitute.
- Inspect the old hub for stamped numbers if it is still on the car.
- Rock each wheel to feel for vertical play at the hub.
- Verify quattro fitment on the replacement, since every US A8 runs all-wheel drive.
The full process is on the wheel bearing check page. The difference between a sealed hub and a serviceable bearing is covered on the bearing versus hub assembly page.
Common questions
Is there an Audi A8 wheel bearing part number?
Not in the catalogs checked for this page. D2, D3 and D4 generations all come back empty, so ordering runs through the VIN instead.
Can an A6 wheel bearing work on an A8?
Not safely. The A8’s aluminum platform carries its own hardware. Marketplace listings that borrow A6 numbers are not a confirmed fit.
Does the A8 use a bolt-on hub or a serviceable bearing?
D3 and D4 cars use bolt-on hub units front and rear. Quattro is standard, so every US car needs a hub built for all-wheel drive.
How should a shop order an A8 wheel bearing?
By VIN through a dealer, or by matching the part being removed. Neither the year nor the trim alone is enough to pull a number.
Why isn’t the A8 in the catalogs when the A4 and A6 are?
The catalogs used for this site never picked it up. The smaller A4 and A6 are documented in depth over the same years. It appears to be a gap in coverage, not a sign the part does not exist.