Honda Motorcycle NRX1800 Rune Turn Signal Bulb Size
The Honda Motorcycle NRX1800 Rune uses a 12496 or PY21W bulb size for front turn signals and a 7440NA bulb size for rear turn signals. The replacement chart covers 2004 to 2005 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 Honda Motorcycle NRX1800 Rune uses three distinct bulb types across its front and rear turn signal positions for the 2004-2005 model years: the 12496, PY21W, and 7440NA.
The 7440NA is the most consistently used bulb in these specifications, appearing in the rear turn signal position for both the 2004 and 2005 model years.
The 7440NA follows the ANSI standard used in the US and Canada. It is a single-filament wedge bulb in the T20 form factor, rated at 12V and 21W, with natural amber glass that produces the amber signal color.
The PY21W follows the ECE standard used in Europe and worldwide. It is a single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base.
Although the PY21W and 7440NA share the same voltage and wattage ratings, their bases are not interchangeable. The PY21W uses a BAU15s bayonet base, while the 7440NA uses a wedge base, making the two physically incompatible.
The front turn signal of the Honda Motorcycle NRX1800 Rune differs between model years. The 2004 model uses the PY21W, while the 2005 model uses the 12496.
The 12496 is a Philips/Osram part number designating a 12V halogen bulb for specialty applications. Unlike the PY21W and 7440NA, it is not defined by a universal ECE or ANSI standard designation.
The rear turn signal position uses the same 7440NA bulb for both the 2004 and 2005 model years, indicating no change in that position across the two model years covered by these specifications.