The Ducati Monster 600 headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 1997 to 2001 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 type is specified for both the high beam and low beam headlight positions across all listed model years of the Ducati Monster 600.
The 9003 bulb is a dual-filament halogen type, meaning a single bulb contains separate filaments for both high and low beam functions within one housing.
Because the 9003 bulb serves both beam positions on the Ducati Monster 600, the high beam and low beam headlight sockets accept the same bulb type rather than two distinct sizes.
The 9003 specification covers the 1997-2001 model years without variation, indicating a consistent headlight bulb fitment across the entire production span represented in these specifications.
The 9003 bulb is also commonly referenced under the equivalent designation H4, and these two part numbers are generally considered interchangeable in the aftermarket, though the 9003 designation reflects the North American DOT standard while H4 reflects the ECE standard used in many other markets.
The 9003/H4 bulb operates at standard ratings of 60 watts on the high beam filament and 55 watts on the low beam filament, which are the conventional output levels associated with this bulb type.
The dual-filament design of the 9003 means that a single bulb failure can affect both beam modes, as both filaments reside within the same glass envelope.
Fitment of the 9003 bulb is governed by a specific three-pronged base configuration, which is not compatible with single-filament bulb sockets or other base types such as H7 or H11.