Ferrari F355 GTS front and rear turn signal bulbs utilize a 1156 size across both positions. The replacement chart covers 1994 to 1998 production specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ferrari F355 GTS uses the 1156 bulb for both front and rear turn signals across all model years from 1994-1998.
The 1156 is a single-filament bulb, meaning it is wired to perform one lighting function only, which in this application is the turn signal.
The 1156 operates at 12 volts and 21 watts, a wattage typical of incandescent turn signal applications in European-market sports cars of that era.
The 1156 uses a BA15s bayonet base, where "BA" denotes a bayonet-style mount, "15" refers to the 15mm base width, and the lowercase "s" indicates a single contact at the base.
The 1156 conforms to ANSI standards applicable in the United States and Canada, classifying it as a North American standardized bulb type.
Because the front and rear turn signal positions share the same 1156 bulb type, a single bulb specification covers all four turn signal sockets on the vehicle.
The BA15s single-contact base of the 1156 is not interchangeable with the BA15d double-contact base found on dual-filament bulbs such as the 1157, despite the two types sharing the same 15mm base width.