Toyota Matrix Side Marker Bulb Size

Additional Notes

• The Toyota Matrix front side marker uses three distinct bulb types across its production run: the 1157NA for 2003-2005 (with 2003 using the 1034NA), the 3457NA for most of the later years, and the 3357NA exclusively for the 2010 model year.
• The 3457NA is a dual-filament T25 wedge bulb rated at 12V with a 27W high filament and 7W low filament. It carries natural amber glass, meaning the amber color is built into the glass rather than achieved through a coating or lens.
• The 3357NA used in the 2010 Toyota Matrix front side marker position is a single-filament T25 wedge bulb rated at 12V and 27W. Despite sharing the same T25 wedge form factor as the 3457NA, it is not a direct substitute due to the absence of a second filament.
• The 1157NA and 1034NA are both dual-filament bulbs with a BAY15d bayonet base, and the 1034NA is formally classified as a variant of the 1157NA. Both are rated at 12V, though the 1157NA is specified at 21W/5W and the 1034NA at 21/5W, reflecting the same functional output.
• The BAY15d bayonet base used by the 1157NA and 1034NA is physically and electrically different from the T25 wedge base used by the 3457NA and 3357NA. These base types are not interchangeable regardless of wattage similarity.
• The rear side marker position on the Toyota Matrix uses the 7443 across all model years from 2003-2013 without variation. The 7443 is a dual-filament T20 wedge bulb rated at 12V and 21W/5W.
• The T20 wedge base of the 7443 and the T25 wedge base of the 3457NA differ in physical size. A T20 bulb seated in a T25 socket, or vice versa, would present a fitment mismatch.
• All bulb types listed across both the front and rear side marker positions conform to ANSI standards applicable to the US and Canadian markets.