BMW Motorcycle R1150GS headlight bulbs utilize H1 size for both high and low beam functions. The replacement chart covers 1999 to 2005 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The BMW Motorcycle R1150GS uses the H1 bulb type for both its high beam and low beam headlight positions across all model years from 1999-2005.
The H1 is a single-filament halogen bulb, meaning each lamp position requires a dedicated bulb rather than sharing filaments within one unit. This is why the R1150GS carries separate H1 bulbs for the high and low beam functions.
H1 bulbs operate at 12 volts and 55 watts, which are standard ratings for halogen headlight applications in motorcycles of this type.
The H1 bulb uses a P14.5s base, a single-pin bayonet-style connector. Any replacement bulb must match this base type to seat correctly in the headlight housing.
The H1 is built to ECE standards, the regulatory framework governing lighting equipment across Europe and many other markets worldwide. It also carries approval for use in the United States and Japan, making it a broadly accepted specification.
Because both the high beam and low beam positions on the R1150GS share the same H1 specification, the same bulb part number is applicable to either socket, though the two positions are not interchangeable in terms of their optical alignment within the housing.