Yamaha XVS950CT V Star 950 Tourer Turn Signal Bulb Size
The Yamaha XVS950CT V Star 950 Tourer uses a P21/5W bulb size for front turn signals and 12496 or PY21W bulb sizes for rear turn signals. The replacement chart covers 2014 to 2017 model 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 P21/5W is a dual-filament bulb operating at 12V with a 21W main filament and a 5W secondary filament, fitted with a BAY15d bayonet base. It conforms to ECE standards used in Europe and worldwide markets.
The BAY15d base on the P21/5W uses offset pins to prevent incorrect installation, a design feature that distinguishes it from single-filament bayonet bases.
The PY21W is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base. It also conforms to ECE standards and produces amber light from the glass envelope itself rather than from a coating or lens.
The BAU15s base on the PY21W uses asymmetrically offset pins, which differ from the BAY15d base on the P21/5W. These two bases are not interchangeable despite their similar appearance.
The 12496 is a Philips/Osram part number designation for a 12V halogen bulb intended for specialty applications. It does not carry an ECE type designation in the same manner as the P21/5W or PY21W.
On the Yamaha XVS950CT V Star 950 Tourer, the front turn signal position uses the P21/5W across all listed model years from 2014-2017.
The rear turn signal position does not use a single bulb type across all listed years. The 2014 and 2017 model years specify the 12496, while 2015-2016 specify the PY21W.
Because the rear turn signal alternates between the 12496 and PY21W depending on model year, confirming the exact year before sourcing a replacement bulb is relevant to correct fitment.