Lincoln Aviator Map Light Bulb Size

The Lincoln Aviator map light requires a bulb size of 578 for the interior lighting system. Data for the specified component covers the range from 2003 to 2005.

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
2003-2005	578

Bulb Specifications

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

Other Locations

Additional Notes

The 578 bulb is the map light bulb size for the Lincoln Aviator across the 2003-2005 model years.
The 578 is a festoon-type bulb, meaning it is cylindrical in shape and makes electrical contact through metal caps at each end rather than through a base or pins.
The 578 bulb has a length of 41mm, which is the span between its two end caps and determines whether it fits a given festoon socket.
It operates at 12 volts and draws 12 watts, figures consistent with standard automotive interior lighting circuits.
The 578 carries an ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.
Festoon bulbs of the same length are not always interchangeable, as wattage and voltage ratings must also match the socket and circuit requirements of the vehicle.