Kawasaki KVF300 Brute Force Brake Bulb Size

The Kawasaki KVF300 Brute Force uses a P21/5W bulb size for brake applications. The replacement chart covers 2012 through 2022 production years with corresponding bulb size specifications.

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
2021-2022	P21/5W
2012-2018	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 Kawasaki KVF300 Brute Force uses the P21/5W bulb for the brake light position across the 2012-2018, 2021, and 2022 model years covered in these specifications.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope, one rated at 21 watts and one at 5 watts, allowing it to serve both a brighter brake function and a dimmer running light function simultaneously.
The P21/5W operates on a 12-volt electrical system, which is standard for most powersports vehicles in this class.
The bulb uses a BAY15d bayonet base, a two-pin offset base design where the two pins are positioned at different heights to ensure the bulb can only be inserted in the correct orientation, preventing filament misassignment.
The P21/5W conforms to ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
Because the BAY15d base is offset, it is not interchangeable with the similarly named BA15d base, which uses pins at equal heights; substituting one for the other is not possible without modification.
The P21/5W designation is also sometimes labeled 1157 in North American markets, though electrical characteristics between equivalent part numbers from different regional standards should be verified before substitution.