Factory build sheet
1991 BMW 318IC I
Build WBABA731-M · 1.8L 4cyl · Convertible
VIN positions 1 through 8 read WBABA731 and position 10 reads M. Those nine characters define this build. Position 9 and positions 11 through 17 differ on every car.
Every 318IC whose VIN starts WBABA731 and carries M in position 10 left the plant with the same engine, transmission, drivetrain and equipment listed below. We know of 34 of them.
- Decoded Jul 7, 2026
- 34 known VINs
- 2 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
- 1.8 L
- Cylinders
- 4
- Engine model
- 4-Value
- Engine manufacturer
- BMW-AG
- Horsepower
- 134 hp
- Fuel type
- Gasoline
Body & chassis
- Body class
- Convertible/Cabriolet
- NHTSA body type
- PASSENGER CAR
- Doors
- 2
- Series
- 3-Series
- Manufacturer
- BMW AG
The same build, other model years
BMW used the VIN pattern WBABA731 for 2 model years. Nothing but the year changes between these pages, so the price gap between them is depreciation on an identical car.
-
1991 You are here code M
- 1992 I 1.8L 4cyl Convertible · 29 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 | BA731 | 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 |
34 vehicles carry this build
Every VIN we have decoded to WBABA731-M shares the specification above.
- 34 Known VINs
- 2 Listed for sale now
- WBABA731 3MEJ10470
- WBABA731 5MEJ11264
- WBABA731 XMEJ10384
- WBABA731 9MEJ10845
- WBABA731 9MEJ11526
- WBABA731 2MEJ11125
- WBABA731 1MEJ10922
- WBABA731 9MEJ10098
- WBABA731 2MEJ11402
- WBABA731 5MEJ10597
- WBABA731 2MEJ11741
- WBABA731 XMEJ10692
- WBABA731 2MEJ10668
- WBABA731 1MEJ10502
- WBABA731 6MEJ11676
- WBABA731 6MEJ11631
- WBABA731 3MEJ10453
- WBABA731 4MEJ10249
- WBABA731 2MEJ11416
- WBABA731 2MEJ10685
- WBABA731 XMEJ10580
- WBABA731 4MEJ11322
- WBABA731 2MEJ11304
- WBABA731 1MEJ11374
- WBABA731 9MEJ11087
- WBABA731 4MEJ10364
- WBABA731 4MEJ11711
- WBABA731 7MEJ10035
- WBABA731 0MEJ11544
- WBABA731 XMEJ11308
- WBABA731 2MEJ11948
- WBABA731 8MEJ10822
- WBABA731 3MEJ11232
- WBABA731 1MEJ10161
Neighboring configurations
Other factory configurations of the 318IC, 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 34 VINs of this build we have seen in dealer inventory. They are a sample of the road population, not a production figure.