Polaris 500 XC SP Tail Light Bulb Size

The Polaris 500 XC SP tail light utilizes 194 and 3157 bulb sizes for the lighting components. Data for the specified lighting equipment covers the range from 1999 through 2007.

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	US Type	EU Type	Shop
2007	194	W5W	Check Price
2005-2006	3157	P27/7W	Check Price
1999-2004	194	W5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price
ANSI standard (US & Canada). Dual-filament wedge bulb (T25). 12V, 27W/7W.	3157	Check Price

Other Locations

Additional Notes

The 194 bulb is an ANSI-standard miniature wedge type with a T10 form factor, rated at 12 volts and 3.78 watts. It is recognized across the US and Canadian markets.
The 3157 bulb is an ANSI-standard dual-filament wedge type with a T25 form factor, also rated at 12 volts but drawing significantly more power, with filaments rated at 27 watts and 7 watts respectively. The dual-filament design allows it to serve two lighting functions within a single housing.
The Polaris 500 XC SP uses the 194 bulb for the tail light across the 1999-2004 and 2007 model years, making it the more frequently specified of the two bulb types across this model's production span.
The 3157 bulb is specified for the 2005-2006 model years only, representing a distinct departure from the 194 fitment used in surrounding years.
The 194 and 3157 bulbs are not interchangeable. The T10 and T25 wedge bases differ in physical size, and the wattage ratings are substantially different, with the 3157 drawing roughly seven times more power on its high-filament circuit than the 194 draws in total.
Because the 3157 carries a dual-filament configuration and the 194 does not, substituting one for the other would also result in a functional mismatch beyond the physical incompatibility.