Home › Vehicles › Audi › Audi A4 › 2002-2008 Audi A4 Wheel Bearing Part Numbers
The short version
- The 2002 to 2008 Audi A4 has an honest gap up front for its first three years, and a 2002 Audi A4 wheel bearing search runs straight into that gap at the front.
- Front hubs are not documented for 2002 to 2004, then read 512305 from 2005 to 2008.
- Rears split by drivetrain the whole run: 512231 on front wheel drive, 510019 on quattro, which presses in.
- 2009 is a seam year that belongs to the next body, not this one.
This page covers the 2002 to 2008 Audi A4, a body that mixes a bolt on front hub with a press in quattro rear. A 2002 Audi A4 wheel bearing question at the front has no documented answer until 2005. The rears, by contrast, are covered for the whole run.
Audi A4 front and rear wheel bearing numbers
Front wheel drive cars use a bolt on rear hub, 512231, for all seven years. Quattro cars use a press in wheel bearing, 510019, also for all seven years.
The front is simpler on paper but thinner in coverage: nothing documented for 2002 to 2004, then 512305 from 2005 on.
Audi A4 wheel bearing part numbers
| Years | Detail | Number |
|---|---|---|
| 2005 to 2008 | Front | 512305 check price |
| 2002 to 2004 | Front | not documented |
| 2002 to 2008 | Rear, quattro, press in | 510019 check price |
| 2002 to 2008 | Rear, front wheel drive | 512231 check price |
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Lookups run through the cross reference page.
This page covers the 2002 to 2008 Audi A4: 2002, 2003, 2004, 2005, 2006, 2007, 2008. Other years live on the main Audi A4 wheel bearing page.
Front wheel drive and quattro rears are completely different parts: a bolt on hub, 512231, against a press in ball bearing, 510019. Do not cross them.
2009 is a seam. One catalog line for the front hub runs into 2009, but that model year belongs to the next body’s page, not this one. Match by what the car is, not by the calendar.
Year by year
2002 to 2004 fronts are an honest gap in the catalogs we hold. A 2002 Audi A4 wheel bearing search at the front meets that gap directly. Match the old part or run the VIN for those model years.
2005 through 2008 fronts read 512305, sometimes noted by bore size in the wider catalogs. Rears do not change across this span at all.
Rears split by drivetrain every single year from 2002 to 2008: 512231 for front wheel drive, 510019, a press in wheel bearing, for quattro.
Front wheel drive and quattro on the same body
This generation was sold with both drivetrains, and the rear axle is not shared between them. A front wheel drive car and a quattro car of the same model year need entirely different rear parts.
The earlier body has its own gaps, covered on the 1996 to 2001 Audi A4 page, and the later one moves to a measurement based system, covered on the 2009 to 2016 Audi A4 page.
Diagnosing an Audi A4 wheel bearing
- Confirm the drivetrain. Front wheel drive and quattro cars need different rear parts, so check which one sits under the car.
- Listen for a hum or growl. A worn bearing usually gets louder with speed and can shift pitch in a turn.
- Compare against tire wear. Read tire noise versus a wheel bearing before ruling in the hub.
- Check for play at the wheel. Follow the standard wheel bearing check with the wheel off the ground.
- Match the old part on a 2002 to 2004 front. With no documented number, read what the old bearing actually is before ordering.
Common questions
What is the 2002 Audi A4 wheel bearing number for the front?
A 2002 Audi A4 wheel bearing at the front is not documented in the catalogs we hold. Match the old part or run the VIN rather than guessing at a number.
What wheel bearing does a 2006 Audi A4 use up front?
A 2006 Audi A4 front takes 512305, part of the run that covers 2005 through 2008.
Why is the quattro rear different from the front wheel drive rear?
The two drivetrains use physically different designs at the rear. Quattro cars press in a ball bearing, 510019, while front wheel drive cars bolt on a hub, 512231.
Does the front hub carry over into the next generation?
Not cleanly. One catalog line for 512305 reaches into 2009, but the 2009 to 2016 body has its own measurement based numbers, so match by the car in hand.
Is the 2002 to 2004 front gap really undocumented?
Yes. The catalogs we hold stop short for those three years, so the correct move is matching the old part or running the VIN, not borrowing a later number.