Suzuki Motorcycle LT185 Tail Light Bulb Size

The Suzuki Motorcycle LT185 tail light requires a bulb size of 12821 for proper installation and function. Data for the specified component covers the range from 1984 through 1987.

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
1984-1987	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 LT185 uses the 12821 bulb for the tail light across the 1984-1987 model years.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor, rated at 12 volts and 5 watts.
The T10 designation refers to a tubular bulb with a width of approximately 10mm, commonly found in low-current indicator and tail light applications.
The base type is W2.1x9.5d, a wedge-style base that relies on the tension of the socket contacts rather than a bayonet or screw mechanism to hold the bulb in place.
The 5-watt rating places this bulb in the low-power category, consistent with its role as a tail light rather than a primary illumination source.
Because all four model years share the same 12821 specification, bulbs sourced for any one of those years are directly interchangeable with the others.