Audi A3 Turn Signal Bulb Size
The Audi A3 front inner turn signal, front turn signal, and rear turn signal bulbs utilize PY21W size specifications across multiple part numbers including 12496, 12174NA, 12188, 921, and 232. The replacement chart covers 2006 through 2024 model years with corresponding bulb size data for each signal location.
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 |
|---|---|
| 2008 | PY21W |
| 2006-2007 | 12496 |
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 2022-2024 | PY21W |
| 2017-2021 | 12174NA (With HID Headlamps) |
| 2014-2016 | 12174NA |
| 2009-2013 | 12188 |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 2022-2024 | PY21W |
| 2020 | 7507 |
| 2017-2018 | 7507 |
| 2014-2016 | 7507 (With Halogen Capsule Headlamps) |
| 2009-2013 | 7507 |
| 2006-2008 | 7506 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W |
| Philips/Osram part number. Halogen bulb, specialty application. 12V. | 12496 |
| OEM part number. Natural amber glass variant. 12V. | 12174NA |
| Philips part number. Halogen bulb, specialty application. 12V. | 12188 |