Vespa S 50 4V Tail Light Bulb Size

The Vespa S 50 4V tail light requires a P21/5W bulb size for proper illumination. Replacement specifications covered in the chart span from 2010 to 2014 model years.

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

YearsUS TypeEU TypeShop
2010-20141157P21/5WCheck Price

Bulb Specifications

Description Type Shop
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.P21/5WCheck Price
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.1157Check Price

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