Pontiac Aztek high beam headlight bulbs use 9005 size while low beam headlight bulbs use 9006 size. The replacement chart covers 2001 to 2005 production years 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 Pontiac Aztek uses the 9005 bulb for high beam headlights and the 9006 bulb for low beam headlights across all model years from 2001-2005.
Both the 9005 and 9006 are single-filament halogen bulbs operating on a 12-volt electrical system, meaning each bulb handles only one lighting function rather than combining high and low beam in a single unit.
The 9005 high beam bulb draws 65 watts, while the 9006 low beam bulb draws 55 watts, reflecting the typically higher output demanded of high beam applications.
The 9005 uses a P20d base and the 9006 uses a P22d base. These two base types are physically distinct, which prevents accidental cross-installation between the high and low beam sockets.
Although the 9005 and 9006 share a similar body shape, the difference in base configuration means the two bulb types are not interchangeable in the Aztek's headlight housings.
Both bulb types conform to ANSI standards recognized in the United States and Canada, indicating standardized electrical and physical tolerances across manufacturers producing these bulbs.