Factory build sheet
1991 BMW 325i E30
Build WBABB231-M · 2.5L 6cyl · Convertible
VIN positions 1 through 8 read WBABB231 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every 325i whose VIN starts WBABB231 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 98 of them.
- Decoded Jul 7, 2026
- 98 known VINs
- 4 listed for sale now
Factory specification
As filed by BMW 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
- 2.5 L
- Cylinders
- 6
- Engine model
- 4-Value
- Engine manufacturer
- BMW-AG
- Horsepower
- 168 hp
- Fuel type
- Gasoline
Drivetrain
- Transmission
- Automatic
Body & chassis
- Body class
- Convertible/Cabriolet
- NHTSA body type
- PASSENGER CAR
- Doors
- 2
- Series
- 3-Series
- Manufacturer
- BMW AG
What this build asks today
Asking prices of live dealer listings decoded to this exact configuration — narrower than the trim-level figure, because every car counted here shares the same engine, transmission and drivetrain.
$24,988 median asking price · 8 listings · as of Aug 30, 2026
Too few listings to publish a price range — with 8 cars on the market, the cheapest and the dearest are single cars, not a spread. The median above is what they ask in the middle.
The same build, other model years
BMW used the VIN pattern WBABB231 for 3 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
- 1990 E30 2.5L 6cyl Convertible · 66 vehicles code L $17,950
-
1991 You are here code M $24,988
- 1992 IC Automatic 2.5L 6cyl Convertible · 61 vehicles code N
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 | WBA | BMW AG · World manufacturer identifier |
| 4–8 | BB231 | Model, body style, engine and restraint system |
| 9 | × | Check digit — computed per vehicle, not part of the build |
| 10 | M | Model year — 1991 |
| 11 | × | Assembly plant |
| 12–17 | ×××××× | Production sequence number, unique to each vehicle |
98 vehicles carry this build
Every VIN we have decoded to WBABB231-M shares the specification above.
- 98 Known VINs
- 4 Listed for sale now
- 8 Priced listings
- $24,988 Median asking
Vehicles of this build
A fixed sample of 1 vehicles carrying this configuration — each with its own history page. The sample refreshes quarterly, not nightly, so it stays put between visits.
Cars are filed by a fixed rule based on the VIN, so a car never moves between groups.
Neighboring configurations
Other factory configurations of the 325i, 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.
Prices are asking prices from 8 live dealer listings decoded to this build , last updated August 30, 2026 . They are what sellers ask, not what buyers paid.
Vehicle counts come from the 98 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.