The Honda Insight brake light requires a 7443 bulb size for the specific lighting component located at the rear of the vehicle. Data for the bulb specifications covers the range from 2000 to 2006.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 7443 is the dominant bulb type across the Honda Insight brake light specifications, appearing in both the general brake and outer brake positions for the 2000-2006 model years.
The 7443 is an ANSI-standardized dual-filament wedge bulb in the T20 form factor, rated at 12V with a 21W/5W output, where the higher wattage filament serves the brake function and the lower wattage filament serves a secondary running light function.
The dual-filament nature of the 7443 means it is not directly interchangeable with single-filament bulbs of similar physical size, as substituting a single-filament type would result in the loss of one lighting function.
The Honda Insight (2021-2022) uses the 12961 in the center high mount stop light position, which is a physically distinct bulb from the 7443 used in earlier model years.
The 12961 is a single-filament miniature wedge bulb in the T10 form factor with a W2.1x9.5d base, rated at 12V and 5W, making it significantly lower in wattage than the 7443.
The 12961 carries a Philips part number designation rather than an ANSI standard number, indicating it is identified by a manufacturer-specific reference rather than a universal industry code.
The T10 base type of the 12961 and the T20 base type of the 7443 are physically incompatible with each other, as the two wedge base sizes are not interchangeable across different socket housings.