The Ski-Doo Summit X E-TEC 850 uses 9008 and 9003 bulb sizes for both high beam and low beam headlight applications. The replacement chart covers 2017 through 2019 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.
The 9003 and 9008 are the two bulb types specified for the Ski-Doo Summit X E-TEC 850, and both are dual-filament halogen bulbs operating on a 12-volt system, allowing a single bulb to serve both high and low beam functions.
The 9003 carries a P43t base and is rated at 60W on the high beam filament and 55W on the low beam filament, conforming to ANSI standards applicable in the United States and Canada.
The 9008 carries a P26t base and is rated at 65W on the high beam filament and 55W on the low beam filament, also conforming to ANSI standards for the US and Canadian markets.
The P43t and P26t base types are physically distinct and incompatible with each other, meaning the 9003 and 9008 are not interchangeable despite sharing the same dual-filament halogen design and low beam wattage rating.
For the 2017-2018 model years, both the high beam and low beam headlight positions use the 9003 bulb, while the 2019 model year uses the 9008 for both positions, reflecting a base type change between those production periods.
Because the high beam and low beam positions share the same bulb type within each model year, a single bulb replacement applies to both functions simultaneously on this snowmobile.