When doing replacement or upgrading on 2003 – 2005 Lincoln Aviator with capsule halogen headlamps HID, the bulb size guide is necessary for you to take the reference.
Jump to corresponding car model with the catalog bellow.

Low Beam Headlight 2003 – 2005 H11
High Beam Headlight 2003 – 2005 9005
Front Fog Light 2003 – 2005 9140
Back Up Light 2003 – 2005 3156
Brake 2003 – 2005 3057
Dome Light 2003 – 2005 578
Front Side Marker 2003 – 2005 12396NA
License Plate 2003 – 2005 168
Parking Light 2003 – 2005 3157
Rear Turn Signal 2003 – 2005 3057
Front Inner Turn Signal 2003 – 2005 3157NA
Front Outer Turn Signal 2003 – 2005 12396NA
Luggage Compartment 2003 – 2005 578
Courtesy 2003 – 2005 194
Inner Tail Light 2003 – 2005 912
Map Light 2003 – 2005 578
Outer Tail Light 2003 – 2005 3057
Low Beam Headlight 2003 – 2005 D2R
High Beam Headlight 2003 – 2005 9005
Front Fog Light 2003 – 2005 9140
Back Up Light 2003 – 2005 3156
Brake 2003 – 2005 3057
Dome Light 2003 – 2005 578
Front Side Marker 2003 – 2005 12396NA
License Plate 2003 – 2005 168
Parking Light 2003 – 2005 3157
Rear Turn Signal 2003 – 2005 3057
Front Inner Turn Signal 2003 – 2005 3157NA
Front Outer Turn Signal 2003 – 2005 12396NA
Luggage Compartment 2003 – 2005 578
Courtesy 2003 – 2005 194
Inner Tail Light 2003 – 2005 912
Map Light 2003 – 2005 578
Outer Tail Light 2003 – 2005 3057