Sterling 827 high beam headlight bulbs use 9005 size while low beam headlight bulbs use 9006 size. The replacement chart covers 1989 to 1991 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 Sterling 827 uses the 9005 bulb for high beam headlights across the 1989-1991 model years.
The 9005 is a single-filament halogen bulb operating at 12V and 65W, built to the ANSI standard for the US and Canadian markets, and fitted with a P20d base.
Low beam headlights on the Sterling 827 use the 9006 bulb across the same 1989-1991 model years.
The 9006 is also a single-filament halogen bulb rated at 12V but draws 55W rather than 65W, and it carries a P22d base rather than the P20d base found on the 9005.
The difference in base type between the 9005 (P20d) and the 9006 (P22d) means the two bulbs are not physically interchangeable, despite their otherwise similar construction.
Both bulb types conform to ANSI standards, which govern electrical and mechanical tolerances to ensure consistent performance across compliant products.