BMW Motorcycle R850R high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers vehicle production spanning 1995 to 2001.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The BMW Motorcycle R850R uses the 9003 bulb for both high beam and low beam headlight positions across all listed model years from 1995-2001.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments to serve both the high and low beam functions within one housing.
The 9003 operates at 12 volts 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 flange, and fitment requires a bulb with this exact base type to seat correctly in the headlight housing.
The 9003 designation follows the ANSI standard used in the United States and Canada, and it is electrically and physically equivalent to the European H4 bulb, though the two designations originate from different regional standards bodies.
Because the 9003 and H4 share the same P43t base and dual-filament configuration, they are generally considered interchangeable, though confirmation against the vehicle's housing specifications is advisable before substitution.