The Acura NSX tail light requires a 194 bulb size for proper illumination and function within the rear housing assembly. Data for the specific component covers a continuous range from 1995 through 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Acura NSX uses two distinct bulb types across its inner and outer tail light positions for the 1991-2005 model years: the 168 for the inner tail light and the 2057 for the outer tail light.
The 168 bulb is a T10 miniature wedge type rated at 12V and 4.9W, conforming to ANSI standards for the US and Canadian markets.
The 2057 bulb is a dual-filament type with a BAY15d bayonet base, rated at 12V with a high/low wattage split of 26.9W and 8W, also conforming to ANSI standards for the US and Canadian markets.
The dual-filament design of the 2057 allows it to serve both brake/turn signal and running light functions within a single bulb, which is typical for outer tail light positions that combine multiple lighting roles.
The 2057 is noted as a brighter variant of the 1157 bulb. While the two share the same BAY15d bayonet base and are physically interchangeable in many housings, the 2057 produces higher output on its primary filament.
The outer tail light position on the Acura NSX (1995-2005) also takes a 194 bulb alongside the 2057, indicating that the outer tail light assembly accommodates more than one bulb socket for those model years.
The 194 bulb is a T10 miniature wedge type rated at 12V and 3.78W, sharing the same wedge base form factor as the 168 but drawing slightly less wattage.
Because the 168 and 194 share the same T10 wedge base, they are physically compatible with the same socket type, though their wattage ratings differ and they are specified for separate positions on the NSX.
All three bulb types listed, the 168, 2057, and 194, conform to ANSI standards applicable to both the United States and Canada.
The inner tail light position on the Acura NSX uses the 168 bulb without variation across the entire 1991-2005 production span covered by these specifications.