The Ducati 999S 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 999S front turn signal uses the 906 bulb across all four model years covered, from 2003-2006.
The 906 is a T10 miniature wedge bulb rated at 12V and 8W, conforming to ANSI standards for the US and Canadian markets.
The T10 wedge base is a push-in type that requires no rotation during installation, a common format for lower-wattage automotive signal applications.
The rear turn signal position on the Ducati 999S does not use a single bulb type across all years, with two different bulbs specified depending on the model year.
The 5008 bulb is specified for the rear turn signal in 2003 and 2006, while the 232 is specified for 2004-2005.
The 5008 is a single-filament bulb with a BA15s bayonet base, operating at 12V, and is described as a lower-wattage variant of the 1156 bulb type.
The BA15s bayonet base uses a single locating pin, which distinguishes it from the dual-pin BA15d base and makes the two types physically non-interchangeable.
The 232 is a festoon bulb with an SV8.5 base, rated at 12V and 3W, a format typically associated with interior or low-load signal applications rather than high-visibility exterior turn signals.
Because the 5008 and 232 use entirely different base types, a bayonet socket and a festoon socket respectively, the two bulbs are not interchangeable between the model years that specify each one.
All three bulb types, the 906, 5008, and 232, conform to ANSI standards applicable to the US and Canadian markets.