Honda Pilot Back Up Light Bulb Size

Additional Notes

• The Honda Pilot backup light specifications reference two bulb types across the model's production years: the 921 (T15) and the 7440 (T20), both of which are ANSI-standardized wedge-base bulbs rated at 12 volts.
• The 921 is a T15 wedge bulb rated at 16 watts, while the 7440 is a T20 wedge bulb rated at 21 watts, making the 7440 a higher-wattage unit despite both sharing the same wedge-base design family.
• Although the 921 and 7440 are both single-filament wedge bulbs, their physical base sizes differ, as the T15 and T20 designations indicate different socket widths. The two types are not interchangeable.
• The Honda Pilot uses the 921 bulb for model years 2003-2015, representing the longer of the two fitment periods covered in the specifications.
• The 7440 bulb applies to the Honda Pilot for model years 2016-2023, with the exception of 2019, 2020, and 2022, which are not listed in the specifications.
• The transition from the 921 to the 7440 between the 2015 and 2016 model years reflects a socket and wattage change, meaning replacement bulbs must correspond to the specific model year rather than being selected interchangeably across the full production range.
• Both bulb types conform to ANSI standards applicable in the United States and Canada, indicating consistent regulatory compliance across the fitment range covered by the specifications.