Polaris SS Brake Bulb Size

The Polaris SS brake light utilizes a specific bulb size identified as 90 for the lighting system. Data for the bulb size covers the range from 1985 to 1986.

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 Type	Shop
1985-1986	90	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90	Check Price

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Additional Notes

The bulb type 90 is an ANSI-standard single-filament bulb rated at 12 volts and 13 watts, fitted with a BA15s bayonet base. The BA15s designation indicates a single-contact bayonet cap with a 15mm base width, a common format in automotive lighting applications.
The Polaris SS uses the type 90 bulb for the brake light position across the 1985-1986 model years.
The single-filament construction of the type 90 means it serves a dedicated function, as opposed to dual-filament bulbs that handle two lighting roles, such as brake and tail, within a single unit.
The BA15s base is a non-indexed bayonet fitting, meaning the bulb can be inserted in any rotational orientation. This differs from the BA15d or BAY15d variants, which use offset or dual-contact configurations and are not interchangeable with BA15s sockets.