Honda S2000 Tail Light Bulb Size

The Honda S2000 tail light requires a specific bulb size identified as 7443 for proper installation and function within the rear lighting assembly. Data provided for the bulb specifications covers the range from 2000 to 2003.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2000-2003	7443

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Dual-filament wedge bulb (T20). 12V, 21W/5W.	7443

Other Locations

Additional Notes

The Honda S2000 uses the 7443 bulb for the tail lights across the 2000-2003 model years.
The 7443 is an ANSI-standardized bulb type, meaning its physical and electrical specifications are governed by a recognized North American standard used in the United States and Canada.
The 7443 is a dual-filament bulb, which means it contains two separate filaments within a single housing, allowing it to serve two distinct lighting functions from one unit.
The bulb operates on a 12-volt electrical system, consistent with standard automotive DC voltage.
The two filaments in the 7443 are rated at 21 watts and 5 watts respectively, with the higher-wattage filament typically associated with braking or turn signal functions and the lower-wattage filament associated with running light functions.
The 7443 uses a T20 wedge base, a designation that refers to the shape and size of the base used to seat the bulb in its socket.
The T20 wedge form factor is a push-in style base, meaning the bulb is retained in the socket by friction rather than by a bayonet or screw mechanism.
Because the 7443 is dual-filament, it is not directly interchangeable with single-filament variants in the T20 family, such as the 7440, without potential loss of one lighting function.