Audi S3 Brake Bulb Size
The Audi S3 brake light uses 7440 and 921 bulb sizes for the rear lighting components. Data for the specific bulb sizes covers the range from 2015 to 2020.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Brake
| Years | US Type | EU Type | Shop |
|---|---|---|---|
| 2020 | 7440 | W21W | Check Price |
| 2019 | 921 | W16W | Check Price |
| 2015-2018 | 7440 | W21W | Check Price |
Outer 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 |
|---|---|---|---|
| 2023-2024 | 1156 | P21W | Check Price |
| 2019 | 7506 | 7506 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W. | 7440 | Check Price |
| ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W. | 921 | 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 |