Kawasaki ZX636 Ninja ZX-6R License Plate Bulb Size

The Kawasaki ZX636 Ninja ZX-6R license plate bulb uses 2 distinct bulb sizes: 12961 and 12821. The replacement chart contains vehicle production years and bulb size specifications spanning 2003 to 2018.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2013-2018	12961
2003-2006	12821

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821

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Additional Notes

The Kawasaki ZX636 Ninja ZX-6R uses two distinct Philips part numbers for its license plate bulb across the model years covered in the specifications: 12961 for 2013-2018 and 12821 for 2003-2006.
Despite carrying different part numbers, both the 12961 and 12821 are T10 miniature wedge bulbs sharing an identical W2.1x9.5d base, 12V operating voltage, and 5W power rating.
The W2.1x9.5d base designation refers to a wedge-type base with a 2.1mm wire contact width and a 9.5mm pin spacing, a format common in low-wattage automotive and motorcycle lighting applications.
The T10 designation describes the bulb's tubular envelope size, where "10" corresponds to a width of 10 eighths of an inch, making it one of the smaller wedge bulb formats used in vehicle lighting.
Because both bulbs share the same base type, voltage, and wattage, the physical and electrical fitment is functionally identical across all model years listed in the specifications.
At 5W, the license plate bulb on the Kawasaki ZX636 Ninja ZX-6R operates at a relatively low wattage consistent with incandescent wedge bulbs used in small-format illumination positions rather than primary lighting roles.