Honda Motorcycle CBR300R front and rear turn signal bulbs utilize a 12496 PY21W bulb size. The replacement chart covers 2015 through 2020 model years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Motorcycle CBR300R uses two distinct bulb types across its turn signal positions: the 12496 and the PY21W.
The 12496 is a halogen bulb designated for specialty applications, operating at 12V, and referenced by Philips and Osram part numbering systems.
The PY21W is an ECE-standard single-filament amber bulb rated at 12V and 21W, fitted with a BAU15s bayonet base, and is common in European and worldwide automotive markets.
The BAU15s base on the PY21W features an offset pin arrangement, which prevents it from being interchanged with bulbs using a standard BA15s base despite a similar physical profile.
The 12496 is the sole front turn signal bulb specified for the CBR300R across the 2015-2020 model years.
For the 2016 front turn signal, both the 12496 and PY21W are listed, indicating that two fitment variants exist for that year.
The rear turn signal for the 2017-2020 model years specifies only the 12496, while the 2015-2016 rear position lists both the 12496 and the PY21W as applicable bulb types.
The dual listings for certain years on the CBR300R reflect the presence of multiple production variants or regional configurations within the same model year rather than a single universal fitment.