Suzuki Motorcycle LT160 Tail Light Bulb Size

Suzuki Motorcycle LT160 tail light requires a P21/5W bulb size, designated as 12821. The replacement chart covers vehicle production spanning 1989 to 2004.

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
2003-2004	P21/5W
1989-1992	12821

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821

Other Locations

Additional Notes

The Suzuki Motorcycle LT160 tail light specifications cover two distinct bulb types across the listed model years: the P21/5W for 2003-2004 and the 12821 for 1989-1992.
The P21/5W is a dual-filament bulb rated at 12V with a 21W primary filament and a 5W secondary filament, conforming to ECE standards used in European and worldwide markets.
The P21/5W uses a BAY15d bayonet base, which is an offset twin-pin fitting. The offset pin placement prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The 12821 is a Philips part number designating a miniature wedge-type bulb in the T10 form factor, rated at 12V and 5W, with a W2.1x9.5d wedge base that requires no separate locking mechanism.
The single-filament 5W rating of the 12821 contrasts with the dual-filament P21/5W, indicating a functional difference in the tail light assembly between the 1989-1992 and 2003-2004 model years.
The BAY15d base of the P21/5W and the W2.1x9.5d wedge base of the 12821 are physically incompatible with each other, meaning the two bulb types are not interchangeable across the different LT160 model years.