Kawasaki KAF400 Mule 600 Brake Bulb Size

The Kawasaki KAF400 Mule 600 brake utilizes a P21/5W bulb size for the lighting component. Data for the specific bulb covers the range from 2015 to 2016.

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
2015-2016	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

Other Locations

Additional Notes

The P21/5W is the brake bulb size specified for the Kawasaki KAF400 Mule 600 across the 2015-2016 model years.
The P21/5W is a dual-filament bulb, with one filament rated at 21 watts for braking and turn signal functions, and a second filament rated at 5 watts for running light functions.
The P21/5W operates on a 12-volt electrical system, which aligns with standard automotive and utility vehicle electrical architecture.
The bulb uses a BAY15d bayonet base, a two-pin offset base design that prevents incorrect installation by ensuring the bulb can only be seated in one orientation.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, meaning it is a globally recognized specification used across European and international markets.