BMW 320i Turn Signal Bulb Size
BMW 320i front turn signal bulbs utilize 3457NA, 3357NA, or PY21W sizes, while rear turn signal bulbs use P21W size specifications. The replacement chart covers 42 years of vehicle production data from 1977 through 2018.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
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 |
|---|---|---|---|
| 2017-2018 | 3457NA (With Halogen Capsule Headlamps) | PY27/7W | Check Price |
| 2016 | 3357NA (With Halogen Capsule Headlamps) | 3357NA | Check Price |
| 2015 | 7507 | PY21W | Check Price |
| 2014 | 12496 | 12496 | Check Price |
| 2013 | 7507 | PY21W | Check Price |
| 1977-1983 | 1157 | P21/5W | Check Price |
Rear Turn Signal
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2013-2015 | 1156 | P21W | Check Price |
| 1977-1983 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA | 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). 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 |
| 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 |