BMW Motorcycle K75 headlight bulbs utilize a 9003 size for both high beam and low beam applications. The replacement chart covers 1986 to 1995 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 BMW Motorcycle K75 uses the 9003 bulb size for both high beam and low beam headlight positions across all model years from 1986-1995.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both high and low beam functions within one housing.
The 9003 bulb operates on a 12-volt electrical system and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm collar, and this base type determines physical fitment into the headlight housing.
The 9003 designation follows the ANSI standard used in the United States and Canada, and it is electrically and functionally equivalent to the H4 bulb used under European and international standards, though the two designations reflect different regional certification systems.
Because the same 9003 bulb serves both beam functions on the K75, a single bulb failure can affect both high and low beam output simultaneously.
The consistent use of the 9003 across the full 1986-1995 production span of the K75 means bulb fitment is uniform regardless of which model year unit is being serviced.