Toyota Sienna Turn Signal Bulb Size

Additional Notes

• The Toyota Sienna front turn signal uses three distinct bulb types across its model years: the 1157 (1998-2000), the 3157NA (2001-2005), and the 3457NA or 3357NA for 2006 and later years. The 3457NA and 3157NA are both dual-filament T25 wedge bulbs rated at 12V, 27W/7W, while the 3357NA is a single-filament T25 wedge rated at 12V, 27W.
• The "NA" suffix on bulb designations such as 3457NA, 3357NA, 3157NA, and 7440NA indicates natural amber glass. This coloring is built into the glass envelope itself rather than applied through a housing lens, which is a relevant distinction for vehicles where the turn signal housing is clear or white.
• The 3457NA and 3157NA share the same T25 wedge base and identical wattage ratings of 27W/7W at 12V, making them physically and electrically similar. However, they are not the same part number, and fitment should follow the year-specific specification rather than treating them as interchangeable.
• The 3357NA, used in the Toyota Sienna front turn signal for 2011 and 2014, is a single-filament bulb, whereas the 3457NA used in surrounding years is dual-filament. Substituting one for the other without confirming socket compatibility and circuit requirements could result in incorrect operation.
• The rear turn signal on the Toyota Sienna uses either the 7440 or 7440NA across most of its model range from 2001 onward, with the exception of 1998-2000, 2004-2005, which use the 1156. Both the 7440 and 7440NA are single-filament T20 wedge bulbs rated at 12V, 21W, with the only difference being the amber glass coating on the NA variant.
• The 1157, used in the front turn signal for 1998-2000, operates on a BAY15d bayonet base and carries a dual-filament rating of 12V, 21W/5W. This base type is physically incompatible with the T25 wedge socket used in later model years, so the two bulb families cannot be substituted for one another.
• The 1156, used in the rear turn signal for 1998-2000 and 2004-2005, uses a BA15s single-contact bayonet base rated at 12V, 21W. The BA15s base is not interchangeable with the T20 wedge base of the 7440 series, despite both being single-filament bulbs with the same wattage rating.
• For the 2021-2024 rear turn signal, the Toyota Sienna specifies the 7440NA, a single-filament T20 wedge bulb with natural amber glass at 12V, 21W. The 7440 (clear glass) carries the same electrical rating but lacks the integrated amber tint of the NA variant.