Mercury Marauder front and rear side marker bulbs utilize 194NA, 194, and 1034NA bulb sizes depending on location and model generation. The replacement chart covers 1969 through 2004 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 194 is the most frequently specified bulb across the Mercury Marauder's side marker positions. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W, and it covers the rear side marker position across all listed model years as well as the front side marker position in 1970.
The 194NA shares the same T10 wedge base, voltage, and wattage as the 194 but incorporates natural amber glass to produce a colored output without a painted or coated lens. It is specified for the front side marker on the 2003-2004 Mercury Marauder.
Because the 194 and 194NA are physically identical T10 wedge bulbs with the same electrical ratings, the only distinction between them is the amber glass envelope of the NA variant. Whether one can substitute for the other depends on whether the housing lens provides the required amber color on its own.
The 1034NA is specified exclusively for the 1969 Mercury Marauder front side marker. It uses a BAY15d bayonet base rather than a wedge base, making it physically incompatible with the T10 socket used in all other listed positions.
The 1034NA is a dual-filament bulb rated at 12V and 21/5W, which reflects two separate wattage levels for its two filaments. This is a notably different electrical profile from the single-filament 3.78W rating of the 194 and 194NA.
The 1034NA is described as a variant of the 1157, a widely recognized dual-filament bayonet bulb. The natural amber glass of the 1034NA distinguishes it from the standard 1157, which has a clear envelope.
The rear side marker position on the 1969 Mercury Marauder uses the 194, a single-filament T10 wedge bulb, while the front side marker for that same year uses the 1034NA, a dual-filament BAY15d bayonet bulb. The two positions therefore require entirely different socket types and bulb formats.
All three bulb types listed in the specifications conform to ANSI standards applicable in both the United States and Canada, indicating they meet a common regulatory baseline for those markets.