Nissan Sentra Tail Light Bulb Size

Additional Notes

• The 1157 bulb is the most frequently specified tail light bulb across the Nissan Sentra's model history, covering the 1982-2006 model years. It is a dual-filament bulb rated at 12V, 21W/5W, and uses a BAY15d bayonet base rather than a wedge-style fitting.
• The 3057 bulb is a dual-filament T25 wedge type rated at 12V, 27W/5W, and represents a higher wattage output on its primary filament compared to the 1157 it replaced in the Sentra's tail light position starting with the 2007 model year.
• The 7443 is a dual-filament T20 wedge bulb rated at 12V, 21W/5W and shares the same wattage rating as the 1157, though it uses a wedge base rather than a bayonet fitting, making the two types physically non-interchangeable despite identical electrical ratings.
• The 2023 Nissan Sentra is the only model year in these specifications to use the 7440NA bulb. This is a single-filament T20 wedge type with natural amber glass, rated at 12V, 21W, distinguishing it from all other listed years which use dual-filament bulbs.
• Because the 7440NA is single-filament and the 7443 is dual-filament, the two T20 wedge bulbs are not functionally interchangeable despite sharing the same T20 form factor. Substituting one for the other would result in incorrect tail light operation.
• All four bulb types in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating consistent regulatory compliance across the full range of listed model years.
• The base type changes across the specification history represent a fitment incompatibility between generations. The BAY15d bayonet base of the 1157 is physically distinct from the wedge bases of the T25 and T20 bulbs used in later model years.