Honda Ridgeline Tail Light Bulb Size

Additional Notes

• The 7443 bulb is the tail light specification for the Honda Ridgeline across the 2006-2014 model years, making it the predominant fitment across this generation.
• The 7440 bulb applies to the 2023-2024 Ridgeline tail lights, representing a different electrical configuration from the earlier generation.
• Both the 7440 and 7443 are T20 wedge-base bulbs operating at 12 volts and sharing the same physical base type, which can create confusion when sourcing replacements.
• The critical difference between the two bulb types is filament count. The 7440 carries a single filament rated at 21 watts, while the 7443 carries dual filaments rated at 21 watts and 5 watts respectively.
• Because the 7443 has two filaments, it is capable of serving two lighting functions from a single socket, such as combining a brighter stop function with a dimmer running light function.
• Despite sharing the T20 wedge form factor, the 7440 and 7443 are not interchangeable for the Ridgeline. Installing a 7440 in a socket designed for a 7443 would result in the loss of one lighting function.
• Both bulb types conform to ANSI standards applicable in the United States and Canada, meaning they meet the same regulatory framework regardless of which model year is being serviced.