Audi A8 Turn Signal Bulb Size
The Audi A8 front inner turn signal requires a 2357NA bulb size, while front turn signals use 12188, 12180, or 1157NA bulbs, rear turn signals use P21W bulbs, and additional turn signal applications use 921 bulbs. The replacement chart covers vehicle production years spanning 1997 through 2014 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 |
|---|---|
| 2001-2003 | 2357NA |
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 2011-2014 | 12188 (With HID Headlamps) |
| 2009-2010 | 12188 |
| 2004-2008 | 12180 |
| 2001-2003 | 1157NA |
| 1997-2000 | 2357NA |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 1997-2003 | P21W |
Turn Signal
| Years | Bulb Size |
|---|---|
| 2010 | 921 (Silver, From VIN 4E-A-000 001, To VIN 4E-A-020 000) |
| 2004-2009 | 921 (Silver) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W. | 2357NA |
| Philips part number. Halogen bulb, specialty application. 12V. | 12188 |
| Philips part number. Halogen bulb, specialty application. 12V. | 12180 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 21W/5W. | 1157NA |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 |