Saturn Sky high beam headlight bulbs use H9 size while low beam headlight bulbs use H11 size. The replacement chart covers 2007 to 2010 vehicle 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 Saturn Sky uses the H9 bulb for high beam headlights across its entire 2007-2010 production run.
The H9 is a single-filament halogen bulb operating at 12V and 65W, built to ECE standards with a PGJ19-5 base, and carries approval for use in the United States as well as worldwide markets.
Low beam headlights on the Saturn Sky follow the same 2007-2010 fitment pattern, specifying the H11 bulb throughout.
The H11 is a single-filament halogen bulb rated at 12V and 55W, conforming to ECE standards with a PGJ19-2 base, and is likewise approved for the US market.
Although the H9 and H11 are both single-filament halogen bulbs sharing the same 12V operating voltage and a visually similar PGJ19 base family, their base suffixes differ (PGJ19-5 versus PGJ19-2), making the two types non-interchangeable between the high and low beam positions.
The wattage difference between the H9 at 65W and the H11 at 55W reflects the higher output demand of the high beam function relative to the low beam.