Toyota Sienna Side Marker Bulb Size

Additional Notes

• The Toyota Sienna front side marker uses three distinct bulb families across its model years: the T25 wedge group (3357NA, 3457NA, 3157NA), the T10 miniature wedge group (168, 168NA), and bayonet or specialty base types (1157NA, 9005). Each family represents a physically different bulb format, meaning they are not interchangeable with one another.
• The 3457NA and 3157NA bulbs are both dual-filament T25 wedge types rated at 12V, 27W/7W with natural amber glass, yet they carry different ANSI designations. Despite their similar ratings, the differing part numbers indicate distinct base or contact configurations, and substituting one for the other without confirming fitment compatibility is not advised.
• The 3357NA is a single-filament T25 wedge bulb rated at 12V, 27W with natural amber glass, while the 3457NA is its dual-filament counterpart at 12V, 27W/7W. The Sienna's front side marker used the 3457NA in 2011 and 2013-2014, and the 3357NA in 2012 and 2018, meaning the filament count changed between adjacent model years.
• The 168NA and 168 bulbs are both miniature T10 wedge types rated at 12V, 4.9W. The sole distinction is that the 168NA carries natural amber glass. The Toyota Sienna front side marker used the clear 168 in 2004-2005 and transitioned to the amber 168NA variant for 2006-2010.
• The 2000 Toyota Sienna front side marker has a mid-year specification change. Vehicles produced through August 2000 used the 1157NA, a dual-filament bulb with a BAY15d bayonet base rated at 12V, 21W/5W. Vehicles produced from August 2000 onward used the 9005, a single-filament halogen bulb with a P20d base rated at 12V, 65W. These two bulbs are entirely different in base type, filament count, and wattage.
• The 9005 is the only halogen bulb in the front side marker specifications. Its P20d base and 65W rating place it in a substantially higher power class than all other bulbs listed, which are low-wattage incandescent types. Its presence in the 2000 model year (from August 2000) represents an outlier relative to all surrounding years.
• The rear side marker on the Toyota Sienna used the 7443 exclusively across 2004-2010. The 7443 is a dual-filament T20 wedge bulb rated at 12V, 21W/5W. Its T20 body is physically larger than the T10 used in some front side marker positions and smaller than the T25 used in others, making cross-position substitution impossible on a dimensional basis alone.
• The "NA" suffix present on several bulb designations (168NA, 3357NA, 3457NA, 3157NA, 1157NA) denotes natural amber glass coloring as part of the ANSI standard classification. This amber tint is built into the glass envelope itself rather than achieved through a lens or coating, which is a relevant distinction for applications where amber output is a regulatory or fitment requirement.