The Alfa Romeo Milano high beam and low beam headlight bulbs both utilize a 9004 bulb size. The replacement chart covers vehicle production spanning 1987 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9004 bulb is the sole type listed across all headlight positions for the Alfa Romeo Milano, covering model years 1987-1989.
The 9004 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam output, which accounts for its use in both headlight positions.
The bulb operates on a 12-volt electrical system and draws 65 watts on the high beam filament and 45 watts on the low beam filament.
The 9004 uses a P29t base, a three-pronged connector specific to this bulb family, which physically prevents substitution with single-filament or incompatible base types.
The 9004 conforms to ANSI standards as adopted in the United States and Canada, classifying it as a regulated North American market specification rather than an ECE-standard type common in European markets.
Because the same bulb number is specified for both the high beam and low beam positions across all three model years, the Milano uses a single-bulb-per-headlight assembly rather than separate bulbs for each function.