Audi A4 Turn Signal Bulb Size
The Audi A4 front inner turn signal uses 3357NA, 3457NA, or 2357NA bulb sizes, while front turn signals use 12174NA, 12272NA, or P21W sizes, and rear turn signals use PY21W, 921, or P21W sizes. The replacement bulb chart covers 1996 to 2020 model years with corresponding 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
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 |
|---|---|---|---|
| 2002 | 3357NA | 3357NA | Check Price |
| 2000-2001 | 3457NA | PY27/7W | Check Price |
| 1999 | 2357NA | P21/5W | Check Price |
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 |
|---|---|---|---|
| 2019 | PSY24W | PSY24W | Check Price |
| 2018 | PSY24W (With HID Headlamps) | PSY24W | Check Price |
| 2009-2017 | PSY24W | PSY24W | Check Price |
| 2007-2008 | 7506 | 7506 | Check Price |
| 2002 | 3757NA (Side) | PY27/7W | Check Price |
| 2000-2001 | 3757NA | PY27/7W | Check Price |
| 1999 | 12961 | 12961 | Check Price |
| 3757NA (From VIN 8D-X-200 001) | PY27/7W | Check Price | |
| 1996-1997 | 2357NA | P21/5W | Check Price |
Rear 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 |
|---|---|---|---|
| 2020 | 7507 | PY21W | Check Price |
| 2019 | 7507 (Without special body measures, standard tail assembly) | PY21W | Check Price |
| 2017-2018 | 7507 | PY21W | Check Price |
| 2015 | 921 (For Vehicle With LED Taillights) | W16W | Check Price |
| 2013-2014 | 7506 (With Halogen Capsule Headlamps) | 7506 | Check Price |
| 2007-2012 | 7506 | 7506 | Check Price |
| 2002 | 7507 | 7507 | Check Price |
| 1999-2001 | 7506 | 7506 | Check Price |
| 1996-1997 | 7506 | 7506 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament wedge bulb (T25), natural amber glass. 12V, 27W. | 3357NA | Check Price |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V, 27W/7W. | 3457NA | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base, natural amber glass. 12V, 26.9W/8W. | 2357NA | Check Price |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W | Check Price |
| ECE standard (Europe & worldwide). Single-filament amber halogen bulb with PG20-4 base. 12V, 24W. | PSY24W | Check Price |
| ANSI standard (US & Canada). Dual-filament wedge bulb (T25), natural amber glass. 12V. | 3757NA | Check Price |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 | Check Price |
| ECE standard (Europe & worldwide). Single-filament amber bulb with BAU15s bayonet base. 12V, 21W. | PY21W | Check Price |
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 | Check Price |