The Ducati 999 front turn signal requires a 906 bulb size, while rear turn signals use 5008 and 232 bulb sizes. The replacement chart covers 2003 to 2006 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.
The Ducati 999 uses the 906 bulb for the front turn signal across the 2003-2006 model years. This is an ANSI-standard miniature wedge bulb with a T10 base, rated at 12V and 8W.
The T10 wedge base on the 906 bulb is a push-in type that requires no rotation during installation, a common trait of miniature wedge bulbs in this class.
The rear turn signal on the 2004-2006 Ducati 999 uses the 5008 bulb, an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V.
The 5008 is described as a lower wattage variant of the 1156. While the 1156 and 5008 share the same BA15s bayonet base, their wattage ratings differ, making them non-interchangeable in applications where wattage tolerance is a factor.
The BA15s designation on the 5008 indicates a single-contact bayonet base with a 15mm cap, a standard fitting used across a wide range of automotive signal applications.
The 2003 Ducati 999 rear turn signal uses the 232 bulb rather than the 5008 found in later model years. The 232 is an ANSI-standard festoon bulb with an SV8.5 base, rated at 12V and 3W.
A festoon bulb, such as the 232, is cylindrical in form and makes contact at both ends rather than through a base socket, which is a physically distinct mounting style from the bayonet base used by the 5008.
Because the 2003 rear turn signal uses a festoon-type 232 and the 2004-2006 models use the bayonet-base 5008, these rear bulbs are not interchangeable across the full 2003-2006 production range of the Ducati 999.