BMW Motorcycle R1200ST uses 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2005 to 2007 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 9003 bulb is the sole bulb type specified across all headlight positions on the BMW Motorcycle R1200ST, covering model years 2005-2007.
The 9003 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to serve two distinct lighting functions.
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 this base type governs physical fitment into the headlight housing.
The 9003 is an ANSI-standardized bulb designation applicable in the United States and Canada, and it is electrically and physically equivalent to the international HB2 designation.
Because the R1200ST uses the same 9003 bulb for both the high beam and low beam headlight positions across all listed years, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.
The H4 bulb, which shares the same dual-filament halogen construction and 60W/55W rating as the 9003, differs in its base type and is not a direct drop-in replacement despite the electrical similarities.