Honda Odyssey Back Up Light Bulb Size

Additional Notes

• The Honda Odyssey uses the 7440 bulb size for the back up light across all model years from 1995 to 2024.
• The 7440 is a single-filament wedge bulb built to the T20 form factor, which refers to its wedge-style base that locks into the socket without a separate metal base or pins.
• The 7440 operates at 12 volts and draws 21 watts, which is standard for incandescent reverse light applications in passenger vehicles.
• Being a single-filament bulb, the 7440 serves one lighting function only, distinguishing it from dual-filament variants in the same T20 family, such as the 7443, which would not be a direct equivalent.
• The 7440 conforms to ANSI standards applicable in the United States and Canada, meaning it meets the electrical and physical specifications recognized by those markets.
• The T20 wedge base design means the bulb is held in place by the tension of the socket itself rather than by a bayonet or screw mechanism, a common trait in modern automotive tail light assemblies.
• Because the 7440 and 7443 share the same T20 wedge housing, they are sometimes confused at point of sale, but the 7443 carries a second filament and a different wattage profile, making it a non-equivalent substitute for a single-filament application.