Polaris ACE 500 / 570 Brake Bulb Size

The Polaris ACE 500 / 570 uses a 3157 bulb size for brake applications. The replacement chart covers vehicle production spanning 2016 to 2019.

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
2016-2019	3157

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

The 3157 is the brake bulb size for the Polaris ACE 500 / 570 across the 2016-2019 model years.
The 3157 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard used in both the United States and Canada.
The 3157 is a dual-filament bulb, which means it contains two separate filaments within a single housing. In automotive brake light applications, one filament typically handles running light duty at lower wattage while the other activates at higher wattage for braking signals.
The bulb operates on a 12-volt electrical system, consistent with the standard voltage found in most powersport vehicles.
The two filaments draw 27 watts and 7 watts respectively, with the higher-wattage filament serving the brake function and the lower-wattage filament serving the running light function.
The 3157 follows a T25 wedge form factor, referring to the shape and base type of the bulb. The T25 designation indicates a wedge-style base rather than a bayonet or screw base, which affects physical fitment in the socket.
Because the 3157 is a dual-filament type, substituting it with a single-filament bulb of similar size would result in the loss of one lighting function, making direct replacement with the correct type necessary for proper operation.