BMW Motorcycle R65 headlight bulbs utilize a 9003 size for both high beam and low beam functions. The replacement chart covers 1978 to 1987 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 R65 uses the 9003 bulb for both high beam and low beam headlight functions across all model years from 1978-1987.
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 operates at 12 volts and draws 60 watts on the high beam filament and 55 watts on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style mount with a 43mm collar, and fitment depends on this base type matching the headlight housing socket.
The 9003 is defined under ANSI standards as used in the United States and Canada, and it is functionally equivalent to the European H4 bulb, though housing and base tolerances between the two standards can affect interchangeability in practice.