Ski-Doo MX Z 670 Brake Bulb Size

The Ski-Doo MX Z 670 brake utilizes a 1157 bulb size for the lighting component. Data for the specified bulb covers the range from 1996 through 1999.

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
1996-1999	1157

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. 12V, 21W/5W.	1157

The Ski-Doo MX Z 670 uses the 1157 bulb for the brake light position across the 1996-1999 model years.
The 1157 is a dual-filament bulb, meaning it serves two brightness levels within a single unit, typically supporting both running light and brake light functions through separate filaments rated at 5W and 21W respectively.
The 1157 operates on a 12V electrical system, which is standard for this class of powersport vehicle.
The base type is BAY15d, a bayonet-style mount with two offset pins that prevent incorrect insertion orientation, distinguishing it from single-filament bayonet bases where pin alignment is not a factor.
The 1157 designation follows ANSI standardization recognized in both the United States and Canada, meaning bulbs sourced from either market are electrically and physically equivalent.
Because the BAY15d base is specific to dual-filament applications, substituting a single-filament bayonet bulb such as the 1156 would result in loss of one of the two brightness functions.