Subaru Baja front and rear side marker bulbs utilize 1034NA and 168 bulb sizes respectively. The replacement chart covers 2003 to 2004 vehicle 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 Subaru Baja uses two distinct bulb types across its front and rear side marker positions for the 2003-2004 model years.
The front side marker on the 2003-2004 Subaru Baja takes the 1034NA bulb, a dual-filament unit rated at 12V and 21/5W with a BAY15d bayonet base and natural amber glass.
The 1034NA is an ANSI-standardized bulb recognized in both the US and Canada, and it is a variant of the widely used 1157 bulb type.
Because the 1034NA is a variant of the 1157, the two share the same BAY15d bayonet base, though the natural amber glass of the 1034NA distinguishes it from the clear-glass 1157.
The dual-filament design of the 1034NA means it carries two separate wattage ratings, 21W and 5W, corresponding to its high and low output modes respectively.
The rear side marker on the 2003-2004 Baja uses the 168 bulb, a single-filament miniature wedge type rated at 12V and 4.9W.
The 168 follows the T10 wedge form factor, which uses no base pins and instead relies on the wedge-shaped glass envelope to make contact within the socket.
The 168 is also an ANSI-standardized bulb recognized in both the US and Canada.
The front and rear side marker positions are not interchangeable, as the BAY15d bayonet base of the 1034NA is physically incompatible with the wedge socket that accepts the 168.