BMW Motorcycle R75/6 uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 1973 to 1976 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 R75/6 uses the 9003 bulb size for both high beam and low beam headlight positions across all listed model years, 1973-1976.
The 9003 is an ANSI-standard halogen bulb recognized in the United States and Canada, operating on a 12-volt electrical system with a dual-filament design rated at 60 watts for high beam and 55 watts for low beam.
Because the 9003 carries two filaments within a single housing, one bulb serves both the high and low beam functions, which accounts for its use in both headlight positions on the R75/6.
The 9003 bulb uses a P43t base, a bayonet-style mount with a 43mm collar, which determines physical fitment into the headlight socket and is not interchangeable with bulbs carrying different base types.
The 9003 designation is the ANSI classification for this bulb type; it is electrically and physically equivalent to the ECE-designated H4 bulb, though labeling differences between the two standards exist depending on the market of sale.