BMW Z4 Tail Light Bulb Size
The BMW Z4 tail light requires P21/5W and P21/4W bulb sizes for the rear lighting assembly. Available data for the specified components covers the period from 2003 through 2008.
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 |
|---|---|
| 2007-2008 | P21/5W |
| 2003-2006 | P21/4W |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W. | P21/5W |
| ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAZ15d bayonet base. 12V, 21W/4W. | P21/4W |