Isuzu Rodeo headlight bulbs utilize 9003 and 9004 size specifications for both high beam and low beam applications. The replacement chart covers vehicle production spanning 1991 to 2004.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Isuzu Rodeo uses two distinct headlight bulb types across its production span: the 9003 and the 9004, both of which are ANSI-standardized dual-filament halogen bulbs rated at 12 volts.
The 9003 bulb carries a 60W/55W power rating, where the higher wattage serves the high beam filament and the lower wattage serves the low beam filament, and it uses a P43t base.
The 9004 bulb carries a 65W/45W power rating and uses a P29t base, which is a physically different base type from the P43t found on the 9003.
Because the 9003 and 9004 use different base types, the two bulbs are not interchangeable, and installing the wrong type will result in an incompatible fit.
Both the high beam and low beam positions on the Isuzu Rodeo use the same bulb type for a given model year, as the 9003 and 9004 are each dual-filament designs that handle both functions within a single unit.
The Isuzu Rodeo (2000-2004) requires the 9003 bulb for both the high beam and low beam headlight positions.
The 9004 bulb applies to the 1991-1999 model years for both headlight positions, representing the longer of the two fitment periods covered in these specifications.
The transition from the 9004 to the 9003 occurred between the 1999 and 2000 model years, marking a change in both base type and wattage configuration across the headlight assembly.