BMW 550i Turn Signal Bulb Size
The BMW 550i uses a 12496 or PY21W bulb size for the front inner turn signal, while the front turn signal requires either a PY24WNA, 3457NA, or PY21W bulb, and the rear turn signal uses a PY21W or 12496 bulb size. The replacement chart covers vehicle production years spanning 2006 to 2016 with corresponding bulb 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 |
|---|---|
| 2014-2016 | PY24WNA (With HID Headlamps) |
| 2011-2013 | PY24WNA |
| 2008-2010 | 3457NA |
| 2006-2007 | PY21W |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 2007 | PY21W |
| 2006 | 12496 |
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). Amber variant of ECE PY24W with PGU20-4 base. 12V, 24W. | PY24WNA |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA |