Polaris Sportsman 450 HO EPS Turn Signal Bulb Size

The Polaris Sportsman 450 HO EPS rear turn signal bulb measures 3157 in size. The replacement chart covers vehicle production spanning 2017 to 2019.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Rear Turn Signal

Years	Bulb Size
2017-2019	3157

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157

The 3157 bulb is an ANSI-standardized type used in the United States and Canada, operating at 12 volts with a dual-filament design rated at 27 watts for the primary filament and 7 watts for the secondary filament.
The dual-filament construction of the 3157 allows a single bulb to serve two lighting functions at different brightness levels, which is typical for rear turn signal applications that also function as running or brake lights.
The Polaris Sportsman 450 HO EPS uses the 3157 bulb for the rear turn signal across the 2017-2019 model years.
The T25 designation refers to the wedge-style base of the 3157 bulb, a form factor that is not interchangeable with bayonet-base or indexed-base bulb types even when wattage ratings are otherwise similar.
The 3157 shares its T25 wedge base with several related bulb types, such as the single-filament 3156, but substituting a single-filament variant in a dual-filament socket would result in the loss of one lighting function.