Audi A4 Courtesy Bulb Size
The Audi A4 courtesy light uses bulb size 12961 or DE3423 depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 1996 to 1999.
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
| Years | Bulb Size |
|---|---|
| 1999 | DE3423 |
| 1996-1997 | 12961 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V. | DE3423 |
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 |