Audi S4 Brake Bulb Size
The Audi S4 uses multiple brake bulb sizes including 921, 7506, 1157, P21W, 2723, and 12961 across different brake light positions, with each bulb size corresponding to specific lighting functions on the vehicle. The replacement chart covers 33 years of S4 production data from 1992 to 2024, detailing bulb specifications for each model year.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Brake
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 |
|---|---|---|---|
| 2021 | 921 | W16W | Check Price |
| 2020 | 7506 | 7506 | Check Price |
| 2018 | 7506 | 7506 | Check Price |
| 2015 | 921 (For Vehicle With LED Taillights) | W16W | Check Price |
| 2013-2014 | 7506 (For Vehicle With LED Taillights) | 7506 | Check Price |
| 2007-2012 | 7506 | 7506 | Check Price |
| 2000 | 1157 | P21/5W | Check Price |
| 1992-1994 | 1157 | P21/5W | Check Price |
Center High Mount Stop Light
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 |
|---|---|---|---|
| 2007-2008 | 1156 | P21W | Check Price |
| 2000 | 2723 | 2723 | Check Price |
| 1992-1994 | 12961 | 12961 | Check Price |
Outer Brake
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2023-2024 | 1156 | P21W | Check Price |
| 2019 | 1156 (Without special body measures, Taillight assemblies, standard design) | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 | Check Price |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 | 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 signalling bulb with BA15s bayonet base. 12V, 21W. | P21W | Check Price |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 | Check Price |
| ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W. | 2723 | Check Price |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 | Check Price |