Kawasaki VN900 Vulcan 900 Parking Light Bulb Size

The Kawasaki VN900 Vulcan 900 parking light bulb uses a P21/5W size. The replacement chart covers 2006 to 2020 model production data with corresponding bulb specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2006-2020	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

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Additional Notes

The Kawasaki VN900 Vulcan 900 uses the P21/5W bulb for its parking light across all listed model years from 2006-2020, with no variation in specification throughout that span.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, one rated at 21 watts and the other at 5 watts, allowing it to serve two distinct lighting functions.
The P21/5W operates on a 12-volt electrical system, which is standard for motorcycle applications.
The bulb uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to ensure the bulb can only be inserted in the correct orientation, preventing filament misalignment.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, meaning it is a regulated specification recognized across Europe and many international markets.
The BAY15d base is distinct from the similarly named BA15d base; the offset pin placement on the BAY15d is a critical fitment detail, as a BA15d bulb with equal-height pins is not a compatible substitute despite its similar appearance.