The Suzuki Motorcycle DR-Z400SM uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2005 to 2019 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 Suzuki Motorcycle DR-Z400SM uses the 9003 bulb size for both its high beam and low beam headlight positions across the 2005-2009 and 2013-2019 model years.
The 9003 is an ANSI-standardized bulb designation used in the United States and Canada, operating on a 12-volt electrical system with a dual-filament halogen design rated at 60 watts for high beam and 55 watts for low beam.
Because both the high beam and low beam positions share the same 9003 specification, a single bulb type serves both lighting functions within the same housing unit.
The 9003 bulb uses a P43t base, which is a bayonet-style mount with a 43mm collar. This base type determines physical fitment into the headlight housing and is not interchangeable with other base configurations.
The 9003 designation is functionally equivalent to the H4 bulb standard used in international markets, though the designations originate from different regional classification systems. Both share the same physical base and filament configuration.
The wattage split of 60W high and 55W low is a fixed characteristic of the 9003 bulb's dual-filament construction, meaning output levels are determined by the bulb's internal design rather than the vehicle's circuitry alone.