Honda Pilot Courtesy Bulb Size

The Honda Pilot courtesy light uses bulb size 168 or 578 depending on the specific version of the vehicle. Data for the bulb sizes covers the range from 2003 to 2018.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2016-2018	168
2003-2005	578

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578

Other Locations

Additional Notes

The Honda Pilot uses two distinct courtesy bulb types across its model years: the 168 and the 578, both of which conform to ANSI standards recognized in the United States and Canada.
The 168 bulb is a T10 miniature wedge type, rated at 12V and 4.9W. The wedge base design means the bulb is held in place by the socket itself rather than by a separate base or pins.
The 578 bulb is a festoon type with a 41mm length and end-cap contacts, rated at 12V and 12W. Festoon bulbs make electrical contact at both ends of the bulb body rather than through a base.
The 578 draws 12W compared to the 168's 4.9W, meaning the two bulb types are not electrically interchangeable despite both operating on a 12V circuit.
The Honda Pilot (2016-2018) uses the 168 bulb for the courtesy application.
The Honda Pilot (2003-2005) uses the 578 bulb for the courtesy application.
The T10 wedge form factor of the 168 and the end-cap festoon form factor of the 578 are physically incompatible with each other's sockets, making cross-substitution between these two generations impossible without socket modification.