The Aprilia RS 50 front turn signal requires a 5008 bulb size, while rear turn signal applications use either 232 or 5008 bulb sizes. The replacement chart covers 2002 through 2005 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 Aprilia RS 50 uses two distinct bulb types across its turn signal positions for the 2002-2005 model years: the 5008 and the 232.
The 5008 is a single-filament bulb with a BA15s bayonet base, operating at 12V. It is classified as a lower wattage variant of the 1156 and conforms to ANSI standards applicable in the US and Canada.
The 232 is a festoon bulb with an SV8.5 base, rated at 12V and 3W. It also conforms to ANSI standards for the US and Canada. The festoon form factor differs structurally from the bayonet-base 5008, and the two types are not interchangeable.
The front turn signal position on the RS 50 uses the 5008 bulb consistently across all four model years from 2002-2005.
The rear turn signal position does not follow the same consistency. The 232 festoon bulb is specified for 2002, 2003, and 2005, while the 5008 bayonet bulb is specified for 2004.
Because the rear turn signal alternates between the 5008 and the 232 depending on the model year, confirming the exact year before sourcing a replacement bulb is necessary to avoid a fitment mismatch.
The BA15s base of the 5008 is a single-contact bayonet fitting, which is mechanically distinct from the SV8.5 base of the 232. Substituting one for the other would result in an incompatible socket fit.