The Ducati Monster 620 uses 5008 and 232 bulb sizes for front turn signals and 5008 for rear turn signals. The replacement chart covers 2002 through 2006 model 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 5008 is the dominant bulb type across the turn signal specifications for the Ducati Monster 620, appearing in both front and rear positions for the 2002-2003 and 2005-2006 model years, as well as all rear positions across the full 2002-2006 range.
The 5008 is an ANSI-standard single-filament bulb operating at 12V with a BA15s bayonet base. It is a lower wattage variant of the 1156 bulb, sharing the same base type but drawing less power.
The 232 is an ANSI-standard festoon bulb with an SV8.5 base, rated at 12V and 3W. Its physical form and base type differ entirely from the 5008, making the two bulbs non-interchangeable.
The 2004 front turn signal on the Ducati Monster 620 takes a 232 festoon bulb rather than the 5008 bayonet bulb used in all other front and rear positions across the model's production run.
Because the 2004 front turn signal uses a festoon-style 232 while the 2004 rear turn signal uses the bayonet-style 5008, the front and rear positions in that model year require two distinct bulb types.
The BA15s base on the 5008 is a single-contact bayonet fitting. It is not compatible with BA15d dual-contact sockets, so socket type should be confirmed before substitution with any other BA15-family bulb.
The SV8.5 base on the 232 festoon bulb refers to the contact cap spacing. A festoon bulb of a different cap spacing would not seat correctly in the same housing, even if the voltage and wattage ratings matched.