BMW Motorcycle R1100GS high beam and low beam headlight bulbs both use a 9003 size. The replacement chart covers 1994 to 1999 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 R1100GS uses the 9003 bulb size for both high beam and low beam headlight positions across the 1994-1999 model years.
The 9003 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments: one rated at 60W for high beam output and one rated at 55W for low beam output.
The 9003 operates on a 12V electrical system, which is standard for motorcycle applications in this class.
The 9003 bulb follows the ANSI standard designation used in the United States and Canada, and it uses a P43t base, which is a bayonet-style fitting with a 43mm flange.
Because the R1100GS uses the same 9003 bulb for both the high beam and low beam positions, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.
The 9003 shares its filament configuration and base type with the H4 bulb, though the two designations reflect different regional standards and may carry subtle manufacturing variations that affect interchangeability depending on the fixture design.