BMW Motorcycle R1150R Roadster Headlight Bulb Size
BMW Motorcycle R1150R Roadster headlight bulbs use H1 size for both high and low beam functions. The replacement chart covers 2002 to 2006 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 R1150R Roadster uses the H1 bulb type for both high beam and low beam headlights across the 2002-2006 model years.
The H1 is a single-filament halogen bulb, meaning one filament handles one lighting function, which is why separate H1 bulbs are required for the high beam and low beam positions rather than a single dual-function unit.
H1 bulbs operate at 12 volts and 55 watts, which are standard ratings for halogen headlight applications in this voltage class.
The H1 bulb uses a P14.5s base, a single-pin connector type that locks into a specific orientation within the housing, making it non-interchangeable with bulbs that use different base configurations such as H4 or H7.
The H1 is built to the ECE standard, a regulatory framework governing lighting equipment across Europe and many other markets worldwide, and it also carries approval for use in the United States and Japan.
Because both the high beam and low beam positions on the R1150R Roadster share the same H1 specification, the physical bulb is identical in both sockets, though the two positions remain electrically and functionally separate circuits.