The Vespa ET4 high beam and low beam headlight bulbs both utilize a 6235B bulb size. 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 ET4 uses the 6235B bulb for both the high beam and low beam headlight positions across the 2001-2005 model years.
The 6235B is a festoon-style bulb, meaning it is cylindrical in shape with contact caps at each end rather than a screw or bayonet base.
The 6235B operates at 12 volts, which is consistent with standard 12V electrical systems found in small-displacement motorized scooters.
The 6235B carries an ANSI designation, indicating it conforms to a standardized specification recognized in the United States and Canada.
The bulb features blue tinted glass, which alters the color temperature of the emitted light compared to clear glass equivalents of the same type.
The 6235B is classified as a specialty application bulb, which indicates it is not a general-purpose replacement type and is intended for specific fitments.
Because the same bulb size fills both the high beam and low beam positions on the Vespa ET4, the two functions are served by a single bulb type rather than separate dedicated bulbs for each function.