Ferrari 328 GTS Turn Signal Bulb Size
The Ferrari 328 GTS front and rear turn signal bulbs utilize sizes P21W, 1073, and 1157, with front applications accepting P21W, 1073, or 1157 and rear applications using 1073 or P21W. The replacement chart covers 1986 through 1989 model production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
Front Turn Signal
| Years | Bulb Size |
|---|---|
| 1989 | P21W |
| 1988 | 1073 |
| 1986-1987 | 1157 |
Rear Turn Signal
| Years | Bulb Size |
|---|---|
| 1989 | 1073 |
| 1986-1988 | P21W |
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 |