The Alternator Air Duct on the BMW 3 Series & M3 (1992–1999) connects the intake components so air reaches the throttle housing. BMW has built vehicles in Munich since 1916, and each Original BMW Part carries its own BMW part number.
Technical Details
- Part: Alternator Air Duct
- Function: Routes intake air between the specified intake-system components.
- BMW part number: 12-31-1-730-635
- Fitment years: 1992–1999
- Applications: BMW 3 Series & M3
Fitment & Compatibility
The table below lists every application this part covers.
PMB Performance can confirm this against your VIN, backed by more than 20 years of parts and fitment work.
| Year | Make | Model | Submodel | Notes |
|---|---|---|---|---|
| 1992–1998 | BMW | 318i | ||
| 1992–1997 | BMW | 318is | ||
| 1998–1999 | BMW | 323i | ||
| 1998–1999 | BMW | 323is | ||
| 1992–1995 | BMW | 325i | ||
| 1992–1995 | BMW | 325is | ||
| 1996–1999 | BMW | 328i | ||
| 1996–1999 | BMW | 328is | ||
| 1995–1999 | BMW | M3 |