Fiat X-1/9 Brake Bulb Size
The Fiat X-1/9 brake light utilizes unique bulb sizes 1157, 1073, and P21W depending on the specific production requirements for the vehicle. Available data for the lighting components covers the range from 1974 to 1983.
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 |
|---|---|
| 1983 | P21W |
| 1982 | 1073 |
| 1981 | P21W |
| 1974-1980 | 1157 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ECE standard (Europe & worldwide). Single-filament signalling bulb with BA15s bayonet base. 12V, 21W. | P21W |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Lower wattage variant of 1156. 12V, 13W. | 1073 |
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |