Fiat 131 Brake Bulb Size
The Fiat 131 brake light requires 1157, P21W, and 1156 bulb sizes depending on the specific application. Available data for the bulb sizes covers the range from 1975 to 1978.
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 |
|---|---|
| 1978 | 1157 |
| 1975-1977 | 1156 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W. | 1157 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W. | 1156 |