The Yamaha VK540 headlight bulb uses a 9003 size for both high beam and low beam applications. The replacement chart covers vehicle production spanning 1988 to 2022.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is the sole bulb type listed across all headlight positions for the Yamaha VK540, covering both high beam and low beam functions throughout the entire model range in these specifications.
The 9003 bulb is a dual-filament halogen type, meaning a single bulb unit contains two separate filaments, one rated at 60 watts for high beam output and one rated at 55 watts for low beam output.
The 9003 operates on a 12-volt electrical system and uses a P43t base, which is a bayonet-style mount with a 43mm collar width.
The 9003 designation follows the ANSI standard used in the United States and Canada, making it the applicable specification for those markets.
Because both the high beam and low beam positions share the same 9003 bulb, the VK540 uses a single dual-filament unit per headlight housing rather than separate bulbs for each function.
The 9003 bulb is also commonly cross-referenced as H4, though the H4 designation follows ECE standards used outside North America. The two types share the same physical form and filament configuration but are governed by different regulatory standards.
The 9003 specification applies to the Yamaha VK540 across the years 1988-1993, 1994-2005, and 2017-2022 as listed, indicating a consistent headlight bulb fitment across a long production span.
The P43t base is a keyed mount, meaning the bulb is designed to seat in only one rotational position within the housing, which aligns the filaments correctly relative to the reflector.