BMW 525i Turn Signal Bulb Size
BMW 525i front inner turn signal bulbs utilize 12496 or PY21W bulb sizes, while front turn signals accommodate 3357NA, 12496, or 3457NA sizes, and rear turn signals use PY21W, 12496, or P21W sizes. The replacement chart covers 1989 through 2007 model 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 | Bulb Size |
|---|---|
| 2007 | 12496 |
| 2006 | PY21W |
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 2007 | 3357NA (Front, To 03/2007) |
| 2006 | 3357NA (Front) |
| 2004-2005 | 12496 |
| 2001-2003 | 3457NA |
| 1989-1995 | P21/5W |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 2007 | PY21W |
| 2006 | 12496 |
| 2005 | P21W |
| 2001-2004 | 12496 |
| 1989-1995 | P21W |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| Philips/Osram part number. Halogen bulb, specialty application. 12V. | 12496 |
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W |
| ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W. | 3357NA |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |