Suzuki Motorcycle LT-F4WDX King Quad 300 Tail Light Bulb Size

The Suzuki Motorcycle LT-F4WDX King Quad 300 tail light requires a 12821 bulb size for proper operation and visibility. Data for the specified component covers the range from 1991 through 1998.

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 Type	Shop
1991-1998	12821	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821	Check Price

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Additional Notes

The Suzuki Motorcycle LT-F4WDX King Quad 300 uses the 12821 bulb for its tail light across the 1991-1998 model years.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base.
The T10 designation refers to a tubular bulb with a 10mm body width, commonly found in low-intensity automotive lighting positions such as tail lights and parking lights.
The W2.1x9.5d base is a wedge-type base, meaning the bulb is held in its socket by the tension of the base itself rather than by a bayonet or screw mechanism.
The 12821 operates at 12 volts and 5 watts, a rating consistent with indicator and tail light applications where low power draw is standard.
The consistent use of a single bulb specification across all eight model years indicates no fitment variation within this production run, and no cross-year substitution concerns arise from the data.