Toyota Tundra Side Marker Bulb Size

Additional Notes

• The 168 bulb is a T10 miniature wedge type rated at 12V and 4.9W, making it among the lowest-wattage bulbs in these specifications. It serves as the front side marker on the Toyota Tundra for model years 2007-2021.
• The 3157NA designation indicates a T25 dual-filament wedge bulb with natural amber-tinted glass, rated at 12V with a 27W high filament and 7W low filament. The amber glass produces a colored output without relying on a colored lens.
• The standard 3157 shares the same T25 form factor and 12V/27W/7W electrical ratings as the 3157NA but uses clear glass. These two bulbs are physically interchangeable in socket terms, though the amber tint of the 3157NA is absent from the 3157.
• The Toyota Tundra front side marker shifted from the 3157NA to the smaller 168 bulb between the 2006 and 2007 model years, representing a change in both bulb family and wattage.
• The 7443 is a T20 dual-filament wedge bulb rated at 12V, 21W/5W. Its wattage ratings differ from the 3157, and the two bulbs are not interchangeable despite both being dual-filament wedge types.
• The rear side marker for the 2006 Tundra carries a production date qualifier, specifying the 7443 bulb only for units built through December 2006, while the 2007 and later years use the 3157.
• Rear side marker fitment on the Tundra varied across multiple bulb types between 2000 and 2006, with the 3157, 7443, and no single bulb type consistent across all years in that range.
• All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating a shared North American fitment classification.