2003 Audi A4 Quattro bearing, hub & seal reference — page 2
Look up 42 BCA catalogue entries for 2003 Audi A4 Quattro. Compare full part references, component roles and recorded restrictions; confirm current vehicle-specific requirements before use.
Filter by vehicle and component
What this lookup establishes—and what it does not
Source: BCA 2021 Wheel Hub Assembly, Bearing and Seal Catalog. The loaded entries cover listed model years from 1995 through 2020. This is a historical catalogue reference, not a live VIN decoder or a guarantee for every trim, market or production date.
BCA is an NTN-owned product line. The numbers below remain BCA part references; they are not silently converted into NTN, SKF or another brand's part numbers. Confirm current OEM/service requirements before use.
Which bearing or hub reference applies?
The catalogue contains 42 reference entries for 2003 Audi A4 Quattro. Select the year and component, then read the full condition and footnote fields. There is no single universal bearing number for every support in this vehicle.
Reference records
26–42 of 42“Bearing”, “hub assembly”, “seal” and “repair sleeve” describe different components. The source description, rather than the catalogue title, determines the role of each number.
On a phone, each record is shown as a complete card with its restrictions. These records do not supply tightening torques or certify a replacement.
| BCA part reference | Component / position | Source model years | Recorded conditions & restrictions | Source trace |
|---|---|---|---|---|
| NS710618BCA catalogue reference | Engine | 2002–2005Subject to the conditions in this row | Crankshaft Seal - Front - 1.8L 1781cc L4No additional numbered footnote is attached to this source row. | 2021 catalogue Page 22Entry 150204a8 |
| NS710618BCA catalogue reference | Engine | 2002–2006Subject to the conditions in this row | Crankshaft Seal - Front - 3.0L 2976cc V6No additional numbered footnote is attached to this source row. | 2021 catalogue Page 22Entry fec0ff7b |
| NS99166BCA catalogue reference | Engine | 2002–2003Subject to the conditions in this row | Camshaft Repair Sleeve - 3.0L 2976cc V6No additional numbered footnote is attached to this source row. | 2021 catalogue Page 22Entry fd94c887 |
| NBA35BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Differential Bearing - Left - 01A Trans.; Manual Trans.; 5 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry 5fef2ce8 |
| NBA35BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Differential Bearing and Race Set - 01A Trans.; Manual Trans.; 5 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry 4c70bc5c |
| NBA35BCA catalogue reference | Manual Transmission | 2003Subject to the conditions in this row | Differential Bearing - Left - 01E Trans.; Manual Trans.; 6 Speed Trans
| 2021 catalogue Page 24Entry 259acdf3 |
| NBLM300811BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Differential Race - Manual Trans.; 5 Speed Trans
| 2021 catalogue Page 24Entry 98869220 |
| NBLM300811BCA catalogue reference | Manual Transmission | 2002–2005Subject to the conditions in this row | Differential Race - Manual Trans.; 6 Speed Trans
| 2021 catalogue Page 25Entry b1389a8d |
| NBLM300849BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Differential Bearing - Right - 01A Trans.; Manual Trans.; 5 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry c0af48d7 |
| NBLM300849BCA catalogue reference | Manual Transmission | 2002–2004Subject to the conditions in this row | Differential Bearing - Right - 01E Trans.; Manual Trans.; 6 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry ed9cb049 |
| NS222540BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Input Shaft Seal - 01A Trans.; Manual Trans.; 5 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry 7d7b06ea |
| NS222540BCA catalogue reference | Manual Transmission | 2002–2004Subject to the conditions in this row | Input Shaft Seal - 01E Trans.; Manual Trans.; 6 Speed TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry 427f7ca5 |
| NS99177BCA catalogue reference | Manual Transmission | 1996–2003Subject to the conditions in this row | Output Shaft Repair Sleeve - 01A TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry 90ebfcea |
| NS99177BCA catalogue reference | Manual Transmission | 2002–2004Subject to the conditions in this row | Output Shaft Repair Sleeve - 01E TransNo additional numbered footnote is attached to this source row. | 2021 catalogue Page 24Entry bcb80991 |
| WE60673BCA catalogue reference | Wheel-Front | 2002–2009Subject to the conditions in this row | Bearing Kit
| 2021 catalogue Page 26Entry b0b9c566 |
| WE60997BCA catalogue reference | Wheel-Front | 1996–2008Subject to the conditions in this row | Bearing
| 2021 catalogue Page 26Entry 001ad5ec |
| WE60997BCA catalogue reference | Wheel-Rear | 2002–2008Subject to the conditions in this row | Bearing
| 2021 catalogue Page 28Entry 366089ec |
Checks before treating a reference as a replacement
Identify the complete vehicle
Match model year, engine, transmission, driven axle, body and production/VIN limits. A year and model name alone may leave several valid-looking entries.
Match the component role
Distinguish a loose bearing, complete hub, cup/cone, seal and repair sleeve. Check front/rear and inner/outer or left/right position exactly as recorded.
Preserve vehicle-specific interfaces
Confirm encoder/ABS arrangement, flange and spline interfaces, retention and the current service procedure. Do not transfer torque or installation force from an unrelated part.
How to use these results
Does a listed number guarantee fitment for my VIN?
No. These are source-listed catalogue references. Read every restriction and verify the current OEM and manufacturer information for the exact vehicle configuration. Missing VIN or production details remain unknown.
Can I replace a hub using a bearing with the same dimensions?
Not on dimensions alone. The complete assembly, encoder, retention, loading and installation interfaces must agree. The main bearing catalogue and cross-brand comparisons are separate dimensional references, not vehicle approvals.
Where are the axle-nut torque and installation instructions?
This application catalogue does not establish a universal torque or a complete installation sequence. Use the current vehicle-specific service procedure, including fastener reuse rules and staged tightening. Do not infer torque from the bearing number.
Does wheel noise prove that one of these parts has failed?
No. Bearing damage, tyres, brakes and driveline faults can produce overlapping symptoms. A reference lookup identifies candidates; it does not diagnose the cause or prove which side has failed.
Look up an exact source part number
Keep the BCA prefix and full marking. Similar numbers from other manufacturers are not automatically cross-references.
Continue the technical investigation
Source and interpretation limits
Factual reference basis: BCA 2021 Wheel Hub Assembly, Bearing and Seal Catalog, published by BCA Bearings, an NTN product line, with its linked numbered footnote reference. Each row retains its source page and restrictions. Vehicle names shared by one source entry remain associated with that entry; source counts are not quantities for sale.
BearingScope provides independently organized technical lookup and interpretation. It does not sell these parts, provide a repair service, certify current fitment, or claim that an absent result is unavailable from a manufacturer. Original public catalogue files and source fingerprints are retained in the site's verification records.