The BMW 850i brake light requires a P21W bulb size for the lighting system. Data for the specific component covers the range from 1991 to 1992.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Brake
Center High Mount Stop Light
Bulb Specifications
| Description |
Type |
Shop |
| 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 |