The Kawasaki VN900 Vulcan 900 uses a P21/5W bulb size for front turn signals and a P21W bulb size for rear turn signals. The replacement chart covers vehicle production spanning 2006 to 2020 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 Kawasaki VN900 Vulcan 900 uses two distinct bulb types across its turn signal positions: the P21/5W at the front and the P21W at the rear, with both types remaining consistent across the 2006-2020 model years.
The P21/5W is a dual-filament bulb rated at 12V with a 21W main filament and a 5W secondary filament, mounted on a BAY15d bayonet base. The offset pins of the BAY15d base are positioned at different heights to prevent incorrect installation.
The P21W is a single-filament bulb rated at 12V and 21W, mounted on a BA15s bayonet base. The BA15s base features a single contact pin, distinguishing it physically from the dual-contact BAY15d used at the front.
Both bulb types conform to ECE standards, meaning they are recognized for road use across Europe and numerous other markets worldwide.
The front P21/5W and rear P21W are not interchangeable. Although both share a 21W operating wattage and a similar bayonet-style base format, their base types differ, and the P21/5W carries an additional 5W filament absent in the P21W.
The BAY15d base of the P21/5W and the BA15s base of the P21W are physically incompatible with each other's sockets, which prevents cross-position installation without modification.