Factory build sheet
1998 Audi A4 1.8T
Build WAUBB28D-W · 1.8L 4cyl · Sedan
VIN positions 1 through 8 read WAUBB28D and position 10 reads W. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every A4 whose VIN starts WAUBB28D and carries W in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 23 of them.
- Decoded Jul 7, 2026
- 23 known VINs
Factory specification
As filed by Audi with NHTSA for this build. Fields the filing does not record are left out entirely — a missing row means no recorded value, not a missing feature.
Engine
- Displacement
- 1.8 L
- Cylinders
- 4
- Engine model
- 1.8T
- Engine manufacturer
- Audi
- Horsepower
- 150 hp
- Fuel type
- Gasoline
Body & chassis
- Body class
- Sedan/Saloon
- NHTSA body type
- PASSENGER CAR
- Doors
- 4
- Manufacturer
- AUDI AG
Weight rating
- GVWR class
- Class 1
- GVWR
- 6,000 lb or less
Gross vehicle weight rating is the loaded ceiling set by the manufacturer, not the car's own weight.
The same build, other model years
Audi used the VIN pattern WAUBB28D for 2 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
-
1998 You are here code W
- 1999 1.8L 4cyl Sedan · 34 vehicles code X
How this VIN pattern is read
A 17-character VIN carries two kinds of information: what was built, and which one it is. This page is the first kind — the nine highlighted positions.
| Positions | Characters | What they encode |
|---|---|---|
| 1–3 | WAU | AUDI AG · World manufacturer identifier |
| 4–8 | BB28D | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | W | Model year — 1998 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
23 vehicles carry this build
Every VIN we have decoded to WAUBB28D-W shares the specification above.
- 23 Known VINs
- WAUBB28D 7WA013639
- WAUBB28D 0WA080065
- WAUBB28D 1WA149331
- WAUBB28D 4WA190682
- WAUBB28D 7WA126023
- WAUBB28D 7WA156381
- WAUBB28D 2WA020322
- WAUBB28D XWA060079
- WAUBB28D 5WA074990
- WAUBB28D 8WA230732
- WAUBB28D XWA107837
- WAUBB28D 0WA070474
- WAUBB28D 6WA145100
- WAUBB28D 0WA208983
- WAUBB28D 4WA095278
- WAUBB28D 8WA008563
- WAUBB28D XWA157136
- WAUBB28D 5WA087691
- WAUBB28D 0WA125165
- WAUBB28D 8WA038162
- WAUBB28D XWA191514
- WAUBB28D 0WA202181
- WAUBB28D 1WA139740
Neighboring configurations
Other factory configurations of the A4, each with its own build sheet. The set is fixed by the VIN patterns themselves, so it does not shuffle as prices or inventory move.
Keep going
Where this data comes from
Specification fields are decoded from the manufacturer's filings in the NHTSA vPIC database, keyed on VIN positions 1–8 and 10. We publish the filed values as they stand and leave out anything the filing does not record.
Vehicle counts come from the 23 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.