The Vespa ET2 front and rear turn signal bulbs both utilize a 5008 bulb size for proper illumination. The replacement chart covers vehicle production spanning 2001 to 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Vespa ET2 uses the 5008 bulb for both front and rear turn signals across the 2001-2005 model years.
The 5008 is an ANSI-standardized bulb type recognized in the United States and Canada.
It operates on a 12-volt electrical system, consistent with standard automotive and small-displacement scooter applications.
The 5008 is a single-filament bulb, meaning it serves one lighting function rather than combining two functions such as stop and tail into a single unit.
It uses a BA15s bayonet base, a single-contact base type where the "s" denotes a single pin, distinguishing it from the dual-contact BA15d variant.
The 5008 is a lower-wattage variant of the 1156 bulb, sharing the same BA15s bayonet base but drawing less power, which makes the two types physically similar yet electrically distinct.
Because the 1156 operates at higher wattage than the 5008, substituting a 1156 in a socket specified for the 5008 risks exceeding the designed electrical load for the Vespa ET2 turn signal circuit.
The identical bulb specification across both front and rear positions means the ET2 uses a single bulb type throughout its turn signal system for the entire 2001-2005 production span.