BMW 328i Turn Signal Bulb Size
BMW 328i front inner turn signal requires a P21/5W bulb size, while front outer applications use 12821, front turn signals accommodate 3357NA, PY21W, or 12496, and rear turn signals use P21W bulb size. The replacement chart covers 1996 to 2016 vehicle production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Inner Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 1997-1998 | 1157 | P21/5W | Check Price |
Front Outer Turn Signal
| Years | Bulb Type | Shop |
|---|---|---|
| 1997-1998 | 12821 | Check Price |
Front Turn Signal
If US Type and EU Type show the same value, a direct cross-reference for this bulb is not available or the data is insufficient.
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2016 | 3357NA (With Halogen Capsule Headlamps) | 3357NA | Check Price |
| 2015 | 7507 | PY21W | Check Price |
| 2014 | 12496 | 12496 | Check Price |
| 1999-2000 | 1156 | P21W | Check Price |
| 1997-1998 | 1157 (Front) | P21/5W | Check Price |
| 12961 (Side) | 12961 | Check Price | |
| 1996 | 1157 | P21/5W | Check Price |
Rear Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2014-2015 | 1156 | P21W | Check Price |
| 1996-2000 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | Check Price |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12821 | Check Price |
| ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W. | 3357NA | Check Price |
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W | Check Price |
| Philips/Osram part number. Halogen bulb, specialty application. 12V. | 12496 | Check Price |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 | Check Price |