BMW X3 Daytime Running Light Bulb Size
The BMW X3 daytime running light requires bulb size 7440 or P21W depending on the specific configuration of the lighting assembly. Data for the provided bulb sizes covers the range from 2014 to 2018.
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 |
|---|---|
| 2015-2018 | 7440 (With Halogen Capsule Headlamps) |
| 2014 | P21W (From 04/2014) |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Single-filament wedge bulb (T20). 12V, 21W. | 7440 |
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |