Toyota 4Runner Turn Signal Bulb Size

Additional Notes

• The Toyota 4Runner front turn signal uses three distinct bulb types across its production history. The 1156NA serves model years 2006-2013, the 7443NA serves 2014-2017, and the 7444NA serves 2018-2024, reflecting a gradual shift toward dual-filament T20 wedge bulbs in later generations.
• The 7444NA and 7443NA are both dual-filament T20 wedge bulbs rated at 12V with a 21W/5W filament configuration and natural amber glass. The two types share the same physical T20 wedge form factor, though they are specified separately by year and are not listed as interchangeable within these specifications.
• The 7440NA is a single-filament T20 wedge bulb rated at 12V and 21W with natural amber glass. It serves as the rear turn signal bulb for the Toyota 4Runner across model years 2001-2024, making it the most consistently used bulb type in these specifications overall.
• The 1156NA is a single-filament bulb with a BA15s bayonet base, rated at 12V and 21W, with natural amber glass. It is used in the front turn signal position for model years 2006-2013 and differs from the standard 1156 in that its amber color is produced by the glass itself rather than a coating.
• The 2005 Toyota 4Runner front turn signal fitment splits by trim configuration. Vehicles equipped with Daytime Running Lamps use the 5702AK, a Sylvania-specific coated variant of the ANSI 3157 bulb in a T25 wedge form rated at 12V and 27W/7W, while vehicles without Daytime Running Lamps use the 7440NA.
• The 2003-2004 Toyota 4Runner front turn signal also splits by DRL configuration. The 4157NA, a dual-filament T25 wedge bulb with natural amber glass rated at 12V and 27W/7W, is specified for DRL-equipped vehicles, while the 7440NA applies to non-DRL vehicles.
• The 1989 Toyota 4Runner rear turn signal uses the 1073 bulb, a single-filament BA15s bayonet-base bulb rated at 12V and 13W. This is a lower-wattage variant of the 1156 and is not interchangeable with it due to the wattage difference, despite sharing the same base type.
• The standard 7440 and 1156 bulbs, used in earlier model years, lack the "NA" suffix found on their later counterparts. The NA designation indicates natural amber glass, meaning the amber color is built into the glass envelope rather than applied as a coating, which is a construction distinction relevant to replacement compatibility.
• The rear turn signal transitions from the 1156 bayonet-base bulb to the 7440 T20 wedge format between the 1995 and 1996 model years. These two bulb types use different base designs and are not physically interchangeable.
• For front turn signal positions, the 1984-1998 Toyota 4Runner uses the 1156 or 1156NA, both single-filament BA15s bayonet-base bulbs rated at 12V and 21W. The 1156 and 1156NA share the same electrical ratings and base type, with the only difference being the amber glass construction of the NA variant.