Kawasaki VN1700 Vulcan 1700 Voyager Turn Signal Bulb Size
The Kawasaki VN1700 Vulcan 1700 Voyager uses a P21/5W bulb size for front turn signals and a P21W bulb size for rear turn signals. The replacement chart covers 2009 through 2020 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 Kawasaki VN1700 Vulcan 1700 Voyager uses two distinct bulb types across its front and rear turn signal positions for the 2009-2020 model years: the P21/5W at the front and the P21W at the rear.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, housed in a BAY15d bayonet base. The dual-filament design allows a single bulb to serve two lighting functions simultaneously.
The P21W is a single-filament bulb rated at 12V and 21W, fitted with a BA15s bayonet base. Its single-filament construction means it serves one dedicated lighting function only.
The BAY15d base of the P21/5W and the BA15s base of the P21W are not interchangeable. The BAY15d features offset pins to prevent incorrect installation, while the BA15s uses a single-contact pin arrangement, making the two physically incompatible despite their similar appearance.
Both the P21/5W and P21W conform to ECE standards, which are recognized across Europe and numerous markets worldwide, reflecting a globally standardized specification rather than a region-specific one.
The front turn signal position on the Kawasaki VN1700 Vulcan 1700 Voyager requires the P21/5W exclusively across all listed model years, meaning a P21W, which lacks the second filament, is not a suitable substitute for that position.
Because the rear turn signal uses the P21W, a single-contact BA15s base bulb, installing a dual-filament P21/5W with its offset BAY15d base in that socket would not be physically compatible.
The consistent use of the same bulb type in each position across all 2009-2020 model years indicates no variation in bulb specification throughout the entire production span covered by these data.