The Isuzu Ascender uses a 9005 bulb size for high beam headlights and a 9006 bulb size for low beam headlights. The replacement chart covers vehicle production years spanning 2003 to 2008 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 Isuzu Ascender uses the 9005 bulb for high beam headlights and the 9006 bulb for low beam headlights across all model years from 2003-2008.
Both the 9005 and 9006 are ANSI-standardized halogen bulb types recognized in the United States and Canada, each operating on a 12-volt electrical system.
The 9005 is a single-filament halogen bulb rated at 65 watts, fitted with a P20d base, and serves the high beam function in the Ascender's headlight system.
The 9006 is a single-filament halogen bulb rated at 55 watts, fitted with a P22d base, and serves the low beam function. Its lower wattage rating distinguishes it from the 9005.
Although the 9005 and 9006 share a similar physical profile, their base types differ: the P20d base on the 9005 and the P22d base on the 9006 are not interchangeable, meaning the two bulb types cannot be substituted for one another in the Ascender's headlight housings.