The UD 2600 high beam and low beam headlight bulb size specifications both utilize a 9003 bulb size. The replacement chart covers vehicle production spanning 1995 to 1998.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 bulb is the sole bulb type specified for the UD 2600 across all listed headlight positions and model years, covering both high beam and low beam functions for 1995-1998.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
The 9003 operates on a 12-volt electrical system, which is standard for automotive applications of this type.
The bulb uses a P43t base, a bayonet-style fitting with a 43mm flange that physically locks the bulb into the headlight housing.
The 9003 designation follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated performance and fitment classification.
Because the 9003 serves both the high beam and low beam positions on the UD 2600, a single bulb type covers the full headlight system rather than requiring separate bulbs for each function.
The 9003 and H4 bulbs share the same dual-filament halogen design and P43t base, making them functionally interchangeable in many applications, though fitment should be confirmed against housing specifications before substitution.