Audi A4 Daytime Running Light Bulb Size
The Audi A4 daytime running light requires bulb sizes 12278, 12277, and P21W depending on the specific version of the vehicle. Data for the provided specifications covers the range from 2007 to 2014.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Bulb Size by Year Range
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 |
|---|---|---|---|
| 2013-2014 | 12278 (With Halogen Capsule Headlamps) | 12278 | Check Price |
| 2009-2012 | 12277 (With Halogen Capsule Headlamps) | 12277 | Check Price |
| 2007-2008 | 1156 | P21W | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| Philips part number. Single-filament halogen bulb with PG18.5d-3 base. 12V, 26W. | 12278 | Check Price |
| Philips part number. Single-filament halogen bulb with PG18.5d-1 base. 12V, 13W. | 12277 | 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 |