The Isuzu VehiCROSS uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years from 1999 to 2001 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 9003 bulb is the sole type specified across all headlight positions for the Isuzu VehiCROSS, covering both high beam and low beam functions for the 1999-2001 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments: one rated at 60W for high beam output and one at 55W for low beam output.
Because the 9003 serves both beam functions within one unit, the VehiCROSS uses the same bulb in the same socket regardless of whether the high or low beam circuit is active.
The 9003 operates on a 12V electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar width, standardized for this bulb family.
The 9003 designation follows ANSI standards as applied in the United States and Canada, distinguishing it from the functionally similar H4 bulb used in other markets, which shares the same dual-filament halogen design but carries a different designation under ECE regulations.
The H4 and 9003 are often referenced together in fitment contexts, but they are not universally interchangeable due to potential differences in base tolerances and regulatory compliance depending on the application.