The Ducati 748 Biposto front turn signal bulb size measures 232 or 5008, while the rear turn signal bulb size measures 5008. The replacement chart covers 1997 to 1999 vehicle production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ducati 748 Biposto uses two bulb types across its front and rear turn signal positions: the 232 and the 5008, both conforming to ANSI standards applicable to the US and Canadian markets.
The 232 is a festoon-style bulb with an SV8.5 base, rated at 12V and 3W. Festoon bulbs are cylindrical in form and mount by contact pressure at each end rather than by a socket base.
The 5008 is a single-filament bulb with a BA15s bayonet base, rated at 12V. The BA15s designation indicates a single-contact bayonet fitting with a 15mm base width, a common format in automotive and motorcycle lighting.
The 5008 is a lower wattage variant of the 1156 bulb. While the two share the same BA15s bayonet base, they are not identical in wattage output, which is a relevant fitment consideration.
The rear turn signal position on the Ducati 748 Biposto uses the 5008 bulb across all three model years covered: 1997-1999.
The front turn signal position uses the 232 bulb for the 1997 and 1999 model years, while the 1998 model year uses the 5008 bulb instead.
The 1998 front turn signal specification differs from both the 1997 and 1999 model years, meaning the front bulb type is not consistent across the full 1997-1999 production span of the 748 Biposto.
Because the 232 and 5008 use physically different base types, an SV8.5 festoon socket and a BA15s bayonet socket respectively, the two bulbs are not interchangeable with each other.