Toyota Sienna Parking Light Bulb Size

Additional Notes

• The 3457NA and 3157NA bulbs share the same T25 wedge base, dual-filament design, and 12V/27W/7W electrical rating. The natural amber glass in both types produces the amber color output without the use of a painted or coated lens, which is the defining characteristic of the "NA" designation in ANSI nomenclature.
• The 3357NA differs from the 3457NA in that it carries only a single filament rated at 27W, making it a non-equivalent substitute in applications where the second filament serves a separate lighting function such as a running light or turn signal.
• The 1157 uses a BAY15d bayonet base rather than a wedge base, making it physically incompatible with the T25 wedge sockets used in later Toyota Sienna model years. The 1157 is also rated at 21W/5W, which is a lower wattage output than the 27W/7W rating of the T25 dual-filament types.
• The Toyota Sienna (1998-2000) takes the 1157 bulb, while the 2001-2004 model years use the 3157NA. This represents a base-type change between the two generations, as the BAY15d bayonet socket of the 1157 is not interchangeable with the T25 wedge socket of the 3157NA.
• The 2012 Toyota Sienna is specified with the 3357NA, a single-filament bulb, while all surrounding model years from 2006-2018 use the dual-filament 3457NA. Because the 3357NA lacks a second filament, it is not a drop-in functional replacement for the 3457NA in applications relying on both filaments.
• All four bulb types listed across these specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the full range of model years covered.