BMW 550i Stepwell Bulb Size
The BMW 550i stepwell requires 12961 and DE3423 bulb sizes for the interior lighting system. Available information covers the specific range of years from 2006 through 2016.
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 Type | Shop |
|---|---|---|
| 2011-2016 | 12961 | Check Price |
| 2006-2010 | DE3423 | Check Price |
Bulb Specifications
| Description | Type | Shop |
|---|---|---|
| Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W. | 12961 | Check Price |
| ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V. | DE3423 | Check Price |