Honda Fit high beam and low beam headlight bulbs both use 9003 size bulbs for replacement. The chart covers bulb size specifications across 2007 to 2020 model years.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Honda Fit uses the 9003 bulb type for both high beam and low beam headlights across the 2007-2012 and 2015-2020 model years.
The 9003 bulb is a dual-filament halogen type, meaning a single bulb contains two separate filaments that serve both the high beam and low beam functions within one housing.
Because the 9003 operates both beam functions, the high beam and low beam positions on the Fit share the same bulb socket and the same replacement part, requiring only one bulb per headlight assembly.
The 9003 standard is electrically and physically equivalent to the H4 bulb, a designation more commonly used in European markets. These two designations refer to the same bulb and are interchangeable in fitment.
The 9003/H4 bulb operates at 12 volts and carries a rated wattage of 60 watts on the high beam filament and 55 watts on the low beam filament.
The dual-filament design of the 9003 uses a P43t base, which is a three-pronged bayonet-style connector. This base type is specific to the H4/9003 family and is not compatible with single-filament base types such as the 9005 or 9006.
Substituting a single-filament bulb in place of the 9003 is not a direct swap, as the socket configuration and wiring harness on the Fit are designed specifically for the dual-filament connector of the 9003.